How To Get Power Out Of A 350 Tbi

How To Get Power Out Of A 350 Tbi2:1 compression with the stock wimpy cam. When you add a throttle body spacer it raises the throttle body thus giving you space in between the air cleaner and the distributor to remove it. Not only will fuel mileage improve, but it made mine run much better. From 270hp to 340hp you need to change the fuel pump as the stock pump can't maintain pressure over 270hp and you need to run 18psi on the 350 truck injectors for a flow rate of 72lb/hr From 340-370hp this is where you should be looking at the 350 injectors and run them at the 22psi for their 82lb/hr flow rate. Welcome to our Shallow Creek Complex where each townhome is approx. Then go to tbi chips for the tune. Additionally, if you want more products to add to your collection, our list of the best 350 tbi mods on the market is a great place to start. strap on a pair of good vortec heads (not sure of the #'s off hand) and an Edelbrock Performer RPM AirGap intake and Holley 650cfm 4150 vac. Discussion Starter · #1 · Jan 6, 2019. shot of nitrous I would guess at least another $10000. It is compatible with the small block engines with flat tappet camshaft and Chevrolet 262, 265, 302, 305, 327, 350, 383, and 400. The pistons you list with the 76cc heads will have a compression ratio of 11. 86 Silvy - LQ4/TH350/208/60F/14FF/4. made a touch over 400 rwhp and almost 600 lb feet on 12-13. and get rid of the carb and go with a fittech TBI 600hp with under the hood fuel pump but you will hear the pump working so if you don’t want to hear that put the fuel pump in the gas tank but that’s a different set up. a TBI 350 is just as junky as any mid 70s to mid 90's 350. changed temp sensor, ERG, cleaned and rebuilt the TBI, replaced all vac lines, fuel filter, added sea. The engine was later used in the Chevrolet Corvette, the Chevrolet Impala SS, and the Pontiac GTO. Discussion Starter · #1 · Sep 7, 2004. If you find a newer engine, an older fuel rail & DBC TB would fit without an issue. There's power hidden in your stock late-model Chevy pickup just waiting to be unlocked. Included in this package is a 5 year/50,000 mile warranty. these are the few things that i have done to the truck so far. It used a Rochester "4MV" Quadra-Jet 4-barrel carburetor and a L48 camshaft. The cpi is very easy to work on also. Jet chip, K&N FIPK, Edelbrock headers and a flow through exhaust. My question is, what is the best thing to do to get a little more power out of this motor? I have been looking into putting some performance . How do you add Power to a TBI 350?. When you add a throttle body spacer it raises the throttle body thus giving you space in between the air cleaner and the distributor to remove it. Get you a bored our TBI and intake, or use a TBI adapter to a 4bbl intake. How should I go about adding horsepower to my 1987 Blazer with a TBI 350? It seems like there is no way to get any good power from it. Add a cam swap and headers and you might get to 350, but probably more like 300-325. these are the few things that i have done to the truck so far. bearcat44 · Welcome Back - Senior Tech Joined Jul 10, 2005 · 890 Posts #2 · Oct 9, 2006 Simple. 030 over (355) – Stock iron heads – GM HEI distributor – cast iron exhaust manifold – Cast Iron manifold - Q-jet carb. 030-inch over Vortec 350 with four-bolt mains. Took #1 spark plug out to find TDC and there was no compression. In 1969 and 1970 it was a 300 hp (224 kW) version of the 350 cu in (5. I was looking along the lines of this: (COMP Cams CL12-205-2 - COMP Cams High Energy. The short-block purchased from eBay Motors was shipped from Wholesale-Engines. The most power that can be made from a smallblock throttle body and injectors is 240hp. hey guys, i recently aquired a 91 chevy C2500 with a new rebuilt 350 tbi. How should I go about adding horsepower to my 1987 Blazer with a TBI 350? It seems like there is no way to get any good power from it. The fp regulator is in your TBI but is easy to repair. problem is that i cant seem to get the truck to idle or run correctly. The TBI fuel system will support a carb. The first try should be an adjustable pressure regulator, turn up the pressure a pound or 2. We take a weekend to rebuild a 350ci small block Chevy V8 engine like you would at your home. secondary carb depending on his cam that should get him awful close to 400hp :> (I'm making 325hp with stock 72 smogger heads and a lame cam). He got my 383 running great and I am pushing 330 or so. Check the fuel pressure to verify if the TBI is indeed going out of fuel. I have a complete bone stock 350 in a 1994 k2500 ext cab shortbed i bought the exhaust was already upgraded from stock when i bought it to like a 3 inch pipe i currently have. they were in bad shape and so that could have. Designed for 1987-95 305/350ci (5. And I believe that with this motor its not really possible to add a performance cam or anything along those lines. 5” 10-bolt- there are a lot of parts made for this unit to strengthen it. i forgot to mention that i also changed the plugs and wires, also the cap and rotor. 350 TBI Build I got a 350 TBI that I want to convert to carbureted, I’m wanting to make good amount of power around 400 HP, this would be my first time doing this and wanna know what parts are needed to make that power with a 350, such as new heads or cam and which are best to make that happen, Thanks for any advice or help 1 1 1 comment Best. how to get a little more power of out a 1994 TBI 350?. The most power that can be made from a smallblock throttle body and injectors is 240hp. Chevy 350 TBI bogs on acceleration due to the following reasons: Leaky vacuum lines. I am looking to rebuild my tired 1990 350 tbi to get better performance and speed out of my rig as a tranny swap on my 4x4 seems to be far more expensive and extensive. Thanks to curiosity, we humans can venture into the unknown with confidence and optimism. (optional) This is a ground from the ECM to control the EGR relay. It started to fire when I cranked with the throttle wide open. Next, install the cold intake and then replace the stock exhaust system with aftermarket. A March pulley package makes a difference but you might lose your AC at low RPM's and tear up the compressor. 3 S10 will stall around 2,600 rpm behind a 350 and is available from GM still. 350 TBI Build I got a 350 TBI that I want to convert to carbureted, I’m wanting to make good amount of power around 400 HP, this would be my first time doing this and wanna know what parts are needed to make that power with a 350, such as new heads or cam and which are best to make that happen, Thanks for any advice or help 1 1 1 comment Best. Ask Away! with Jeff Smith: Getting 400+ HP From an Old Small. Thenadd Vortec heads, GM intake and a new cam and you've got something. If you want power get good headers, good intake and cam, and vortec heads. Custom Fab, brackets, tabs, gussets, wheel centers, and more. I was wondering if this is the build to do or are there other build. You need to get the compression ratio up to approx 9. You can find them on ebay cheap. 7 Posts. com fully assembled on a pallet. 350 tbi engine stalls while coming to a stop, also have. On my 94 I replaced it and put a spacer on it, and it made quite a bit of difference. The biggest TBI injector that was ever made was the. This video demonstrates how to test a TPS on a 1994 Chevy C1500 with a 350 TBI. secondary carb depending on his cam that should get him awful close to 400hp :> (I'm making 325hp with stock 72 smogger heads and a lame cam). 98 Posts. They all need all of the parts replaced to feel like a real v8. The most power that can be made from a smallblock throttle body and injectors is 240hp. HOW TO: MAKE SBC POWER WITH BASIC BOLT ONS (305, 327 & 350) Richard Holdener 235K subscribers 96K views 1 year ago HOW DO YOU INCREASE THE POWER OF ANY SBC WITH BOLT ONS? CAN YOU ADD POWER. Spark Plugs Get Worn Out 03. Check the fuel pressure to verify if the TBI is indeed going out of fuel. Something like a 290 Hp 350 is a good start. Just a head swap to a 64cc Vortec type head will get you a 40 HP gain. how easy is it to build power with a tbi 350 i got 4 layin around all run but i wanna run fuel injection on one of my 82s and i kno they will drop in there. I got a 350 TBI that I want to convert to carbureted, I’m wanting to make good amount of power around 400 HP, this would be my first time doing this and wanna know what parts are needed to make that power with a 350, such as new heads or cam and which are best to make that happen, Thanks for any advice or help. Here's a list of the pins but they are also on the wiring diagrams above. Yours may or may not have that canister, but it's worth a look and I think the kit was $15 or so. Back in the old days, could drop the fuel pump inlet into a gas tank, apply 12V to the ignition, hit the starter, and even hear how the engine runs before going through all the work of dropping it in, but less than a half a dozen wires to hook up. Street Ultimate Cam Kit 280H timing springs. KWTMECH said: The first try should be an adjustable pressure regulator, turn up the pressure a pound or 2. You have to tap off the exhaust manifold/header for the EGR with Vortec heads. Stock 210hp 350 V8 up to 250hp the stock 55lb 350 truck injectors at the factory 11-12psi is fine. Kennewick Washington. Take the can off and look into itlooks like about a 2" hole, VERY restrictive. And even then, that tbi will be struggling to make the same power as an LS swap with a few. How To Increase Horsepower On A 350 Engine?. Using your 1993 GM heads will need some work, mild porting to get them to breathe better. Check the knock sensor of the Chevy 350 TBI. You get more power with less weight and your motors weight is more in the center of your rig. One of the easiest ways to increase fuel flow is with an adjustable fuel pressure regulator. I've purchased a 1991 K1500 with the 5. Jet chip, K&N FIPK, Edelbrock headers and a flow through exhaust. The easiest ways to increase the horsepower on a 350 engine are: Installing a Supercharger or Turbo Kit Having an aftermarket exhaust system Installing an Engine Tuner The cheapest ways to increase horsepower on a 350 engine are: Upgrading the air intake Adding more exhaust fluid Installing performance tuner Upgrading to synthetic lubricants. mr_udy Registered Joined Feb 26, 2006 76 Posts #12 · Feb 26, 2006 My family has had a few TBI 350s w/ around 200K. A 180hp 350 tbi motor makes a good 230-240hp using Sae gross math. Vortec heads for higher rpm power and cleaned up TBI heads for low rpm TQ production. This would help with the current cam as well. But at 350 cubes it would be hard to get 700 hp or so and then put a 500 HP nitros shot on top of that. First it probably wouldn't last beyond one time. You can get more power for your 5. 3L truck engine and put on a carbureted intake manifold, a 750 cfm Holley carb, headers, and stick in a mild hydraulic roller like Summit’s Stage 2 truck cam with 218 degrees of duration. The ZQ3 is the standard engine in the 1969–1974 Chevrolet Corvette. If the valvetrain is already messed up, might as well trash it, sell the TBI setup on CL, rockcrawler guys tend to love it for an easy fuel injection swap. Companies such as JET, Turbo City, and CFM Technologies sell adjustable. Spark Plugs Get Worn Out; 03. Chevy 350 TBI Bogs On Acceleration [9 Easy Solutions] 01. A March pulley package makes a difference but you might lose your AC at low RPM's and tear up the compressor. Biggest HP gains you will see for not a lot of money would be cam and exhaust. The other way to get more power out of the TBI engine is to replace the heads. How to build a fuel efficient 250. 12-15 runs best The previous owner installed a new 3" pipe from the Y-collector back and deleted the cat (not my choice). The run on the Vortec 350. they were in bad shape and so that could have. Car Craft worked a 350 TBI truck over a few years ago and they saw some impressive power gains from rather odd items like a device they called "the mixing bowl" if memory serves, a filter adapter that tries to feed air through the top of the TBI unit better than without. Add a cam swap and headers and you might get to 350, but probably more like 300-325. A converter for a 1995 CPI L35 4. I just had my intake bored to match my bigger tbi. Then talk to Brian and http://www. Using a socket wrench, remove the oxygen sensor from the exhaust pipe. they were in bad shape and so that. There is a good chance that your Chevy 350 TBI is bogging due to a lack of fuel. Best Cam For TBI 350: Reviews, Tips and Buying Guide. Camshafts determine how far the valves open and let air in and out of . Having replaced the cam won't have any affect on seafoaming it now. Here’s how to check your muffler restriction on a Chevy 350 TBI: Park your vehicle on level ground and turn off the engine. I have a 90 K5 with 185k and starts all the time. 6:1 rockers with a 112° LSA and the stock intake and injection made 328 rwhp and ran a 14. Making big power from a recycled 350 Chevy is as easy as See all 13 photos 02. Spark plugs get worn out. Save Reply Quote C cutlass8692 Registered. I Performer Power Package. Replacing the exhaust with a higher flow will help a lot, also replace the cat TBI systems like fuel pressure. more hp for my 1990 350 with tbi. a 2 barrel tbi max hp is 350 the best thing you can do once you get it breathing better is swap for an FI tech that said, 454 TBIs are larger/high fuel capacity. all the cars came with all the roller hardware and cam, the trucks mainly after 90ish got roller machined blocks, just no hardware so keep that in mind. The Edlebrock 3702 is designed to take the TBI engine close to its limit with TBI on top. Discussion Starter · #1 · Jun 20, 2011. Basically I'm looking at some minor upgrades to my 94 350 tbi, nothing where I would have to modify alot. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, . Includes injector spacer (design may vary), 14psi regulator spring and instructions on modifying your OEM stock TBI base to add enough fuel and air for up to 40hp gain w/ power adders such as headers, free flow exhaust intake and small cam upgrades. that is what i did just get the TBI vortec heads. For flat tappet cams, I recommend the Davis Unified 12620bk then. A1- grn/wht- this wire is used to energize the fuel pump relay. The fuel pump gets defective. I have a 90 K5 with 185k and starts all the time. This isn't a bad cam, it is very close to the cam used in the 300 horse 327 but with more LSA at about 112 degrees to keep the idle vacuum up for the TBI. Your engine last longer and gets better milage if it runs at optium temp. 350 TBI Build. That's the fairly inexpensive package. With its four bolt main block, nodular iron crankshaft, PM steel connecting rods and light but strong cast aluminum pistons, this engine screams durability. also, many tbi blocks are roller ready, if you have a roller ready block your giving up some power by keeping it flat tappet. 67 and in my view a better transmission. Recommended 350 TBI modifications. You are talking about increasing the horsepower by almost 50% compared to the stock TBI motor. The filter screens in the fuel tank can gradually get gummed up. Yeah the heads are junk and not many people turbo TBI's but that's why I'm asking. 90 chevy 1500 350 220 ish mileage , TBI , drove 15 miles park came back out When those go bad, truck thinks it's like 0 degrees out, . Defective Ignition System FAQs: What does 350 TBI mean?. To what you have now, the cheapest add on power is a set of long tube headers. My truck needs some more powerit's a stock 94 350 TBI. Thenadd Vortec heads, GM intake and a new cam and. E11: Michael Unbroken: Got the Blueprint From Jay. If you're on a budget, just rebuild the TBI with Vortec Heads and stuff. how to improve fuel milage on a chevy 350 tbi? help!. Its there to raise the air cleaner so it doesn't hit the distributor. On my 94 I replaced it and put a spacer on it, and it made quite a bit of difference. With a set of headers ,2 1/4 exhaust and. The TBI heads actually flow better than. This is due to air shortages and fuel shortages. I just changed out the ICM at the base of the distributor and we have progress but it still wont start. The majority of engine codes begin with the letter L -- L31, for instance. 5:1 compression 383 for my 94 4x4 with RHS vortec heads, took a GMPP TBI intake and ported it / had the flange opened up to accept the Holley 680cfm TBI, Comp hydraulic roller, have had 3 companies burn chips for it and it it makes an HONEST 325HP I'd be surprised. Edelbrock 1223 Pro-Flo Black Finish 3″ Round Air Filter Element with 14″ Diameter. Also, check out the other sensors like the 02 sensor that controls the fuel management of ECM. Also, people tend to way over estimate the power ratings of their enginesthere is a big difference between a true dyno-proven 300 hp engine versus a stock motor with a few bolt-ons that somebody claims has 300 hp. 400 from the TBI motor is a pipe dream. Although I was skeptical, you were right about the regulator. I still want to run a stock trans. Michael offers gems of hard-earned wisdom on seeing new possibilities from the darkest places in life and living from unlimited potential by prioritizing. They have like a sleeve that takes the place of that can. The stock 305 and 350 TBI unit has 2 (1 11/16″) bores which flow 450 cfm of air. This again lets you get away with a milder cam and fewer, if any, changes to the injection programming. Replacing the exhaust with a higher flow will help a lot, also replace the cat TBI systems like fuel pressure. 350 TBI tows 5000/6000lbs. it will run while fluttering the pedal but that is all. Its there to raise the air cleaner so it doesn't hit the distributor. Motorised mobility power chair in Pembroke Dock. I'm confident you could get pretty close to the factory 96-98 truck torque hp figures with that intake manifold and heads I linked to and some tuning time. A stock cast can exceed the performance limits at 50 to 150 HP before surpassing the reliability level set by. Step one: Remove 305 Step two: Insert 350 and enjoy J/k, I'm sure others will chime in but it may take some doin to get that anemic 305 to push 275 horse I'm not an expert on that engine though. 1993 350 TBIwant more power. We'll trade in our professional gear for tools you might have at your house to show you how to get. An electric fan makes a difference but when it's hot out and you get stuck in traffic you could over heat your engine. a TBI 350 is just as junky as any mid 70s to mid 90's 350. 7L 350CI TBI V8 along with 4x4, it has an extended cab and standard bed. The first upgrade for our 305 will be this set of Hooker long-tube, stainless steel headers, PN 2451-2HKR. I just finished upgrading the top end on my 1991 Chevy K1500 5. Chevy 350 Replacement Parts. I have a 1992 Chevy k2500 with a 350 TBI in it and I have recently started having no pulse/spark/no start issues that I am trying to figure out. 5x15 Boggers jayz8886 Registered Joined Oct 24, 2004 1,051 Posts #5 · Nov 16, 2009 The pod spacers work well for a few hp but the dyno will show no real gains from the under tbi spacers. It depends on where you want your power. Yours may or may not have that canister, but it's worth a look and I think the kit was $15 or so. I'm confident you could get pretty close to the factory 96-98. 35 billion — but the taxman is always. Although that throttle-body injection (TBI) engine is disguised as just another. com as well as a bored SBC throttle body at 22psi of fuel pressure on. Looking at cams and trying to decide. Here's a list of the pins but they are also on the wiring diagrams above. The filter screens in the fuel tank can gradually get gummed up. There is a good chance that your Chevy 350 TBI is bogging due to a lack of fuel. The living area is very cozy and the kitchen has a breakfast bar looking into the living room, the dining room is right off of the kitchen with a door leading out to your own private covered patio! The kitchen is equipped with top-of-the-line energy star appliances, granite. Motorised mobility power chair in Pembroke Dock. Something like 15hp to find with the silly thing. How to get more hp from a 89 305 tbi. All that has changed with emission controls and a ton of wires to hook up. Adding Power to an Engine with GM TBI Injection. 2006 1500HD Cognito 4/6” lift Intake and HPtune (JIM),Cognito Steering kit, comp 218/224 114lsa cam 306RWHP 307RWTQ. Our Top 10 Best Spark Plugs for 350 TBI Reviews. If you don't want to tear into the engine, replace the prom . He has dynos to back up his customer and his own projects. CHEVY 350 TBI Fits 1987-1995 Chevy & GMC Full Size Trucks and SUV's "MACHO MAN" This 300 HP Chevy 350 TBI engine is a direct replacement without any modifications to the ECU or injectors. The other way to get more power out of the TBI engine is to replace the heads. The stock engine would be turbocharged for now and once that engine throws a rod, spins a bearing, burns a piston, or some other tragic reason to be pulled from the truck it will be replaced by a vortec 5. How to Mod a 305 with Bolt. A gt4708 is big enough to support moderate Rpms and power on say a 454. I was thinking headers and a better Y-collector. neverendingproject 1/2 ton status. 5 to one with a good set of aftermarket heads. Chevy 350 TBI Bogs On Acceleration. Chevy 350 TBI bogs on acceleration due to spark plugs get worn out, Vacuum lines or hoses are the power source of a car. Discussion Starter · #1 · Feb 9, 2011. They have like a sleeve that takes the place of that can. At this time, I would also get a TBI spacer ($60) and. I plumbed a gauge into the stock setup and it was only putting out 9. If you go tbi, do yourself a favor and get a better cam. The heads were shaved and the compression is up to 165 psi. Basically I'm looking at some minor upgrades to my 94 350 tbi, nothing where I would have to modify alot. 5” 10-bolt- there are a lot of parts made for this unit to. You can seafoam your engine right away. Ideal for trucks, Blazers and Suburbans (Will not fit Caprice or . One of the main pillars of Merck's company culture is cultivating curiosity in our colleagues. Check out a film where our colleagues reflect and share personal insights about the power. These pop-it valves open when the injectors pressurize the fuel block and hoses. Bosch Automotive 9614 Double Iridium. This type head gets much better power by improving the burn rather than using more fuel and air to burn. Here’s what the initial tax bill would be, and how much more you may owe. Filter screens get gummed up. The 350 will probley have more torque though. and found out that the person they got it from changed the exhaust. Up to 230hp engines that air flow is fine. Do ya think an early 90's TBI setup can support 330hp/380 lb/ft?. The stock exhaust manifolds were ditched in favor of a set of Hooker headers. Add a cam swap and headers and you might get to 350, but probably more like 300-325. Take the can off and look into itlooks like about a 2" hole, VERY restrictive. these are the few things that i have done to the truck so far. Easy at home upgrades include port matching for sure. Check the fuel pressure to verify if the TBI is indeed going out of fuel. So a 300 horse 350 would require about 150 pounds of fuel per hour which then requires 2 injectors of 75 pound per hour capacity. That's the fairly inexpensive package. We take a weekend to rebuild a 350ci small block Chevy V8 engine like you would at your home. For roller cam engines use a new best brand distributor you can get at your local autoparts store for a 1992 Camaro 350 TPI Z28 which also uses a flat tappet camshaft. The factory 1-5/8's throttle bore TBI flows around 440 CFM which is a bit small for a 350. the 200R4 has a higher 1st gear of 1. They feature 1-5/8 diameter pipes, the perfect size for our displacement. 7 TBI by filling up your vehicle with high-octane fuel above 90-octane and then adding the fuel injector cleaner to your vehicle’s gas tank every 3000 miles. Re: The 300HP TBI 350 challenge 01-30-03 05:48 PM - Post# 168226 In response to InfernoSRT8 Keep it comin' boys, I want this thread to have some info to archive. Remember they are 190HP at their best. Running a fuel rail w/ return and DBC TB is most simple IMO, this is most 99-02 engines. The 350 TBI is a fuel-injected engine that uses throttle body injection. 0 itself would be under a $1000 probably but the mods would run a little more than that. I have a 89 chevy tbi that cranks from a cold start and runs good until it warms, then runs rough and stalls everytime. The fp regulator is in your TBI but is easy to repair. Make sure the vacuum line to the map sensor in not pinched anywhere. We’ll trade in our professional gear for tools you might have at your house to show you how to get. While choosing the best cam for 350 TBI, you will have to consider various features and benefits before making an actual purchase. Its there to raise the air cleaner so it doesn't hit the distributor. i forgot to mention that i also changed the plugs and wires, also the cap and rotor. There is a good chance that your Chevy 350 TBI is bogging due to a lack of fuel. In this episode, best-selling author and award-winning speaker Michael Unbroken, an advocate for adult survivors of trauma, inspires us with his story of going from “homeless to hero. Smooth idling and torquey, no ticks, knocks, or blowby at all so it was well assembled. It was a complete pull from a salvage. That’s not what you asked, but that would be the easiest way to achieve 400 hp. I tuned a TBI big block and even with a bored out TB it was pulling vacuum . A 454 tbi wont work unless you get some custom intake for it i think. So that my friends is how to up the power on your 350 tbi. Higher if you're willing to swap pistons and cam. A converter for a 1995 CPI L35 4. Motorised Mobility Power Chair. Bent77 curmudgeon Status Staff member Moderator GMOTM Winner Joined. 1000 square feet with a very open and modern layout. Chevy 350 TBI Built In The Backyard with Hand Tools. Often, the fuel pumps and fuel pressure regulators can go bad. I have a 92 regular cab short box 1500 with the 350 TBI and power seems fine, it has a straigh exhaust, stock manifolds, no cat, no muffler and a shift kit, i think it has a different cam but i'm not sure cuz we've never done anything to it, but power for me is no problem. The cheapest and best performance gain you will get will be from a camshaft swap. Then a good exhaust is essential. 89 chev pu, 350 tbi, idles fine when cold ,. The stock 19 lb/hr poppet injectors are good for around 330 rwhp or 400 crank hp. You get more power with less weight and your motors weight is more in the center of your rig. Based on its power, a chevy 350 engine can produce 350–400 HP. Get a spray bottle of water and mist the coil while its . The intellectual curiosity is vital to human progress. PACKAGE OPTIONS TURN KEY - $6,000 Custom paint job Valve covers Breather Oil pan Timing cover Balancer Flexplate. 3 S10 will stall around 2,600 rpm behind a 350 and is available from GM still. Install a performance camshaft to increase airflow and exhaust movement during combustion. I slid under it to check the connections to the O2 Sen. At the end of each plastic hose is a spring-loaded check valve known as a pop-it valve. They all need all of the parts replaced to feel like a real v8. Discussion Starter · #4 · Apr 3, 2005. Joker is onto it with an FiTech fuel system. The second most important number to look for is the lobe seperation, which is the distance in degrees, as measured on the cam, between the point of peak lift on the intake lobe and the peak lift on the exhaust lobe. Check the knock sensor of the Chevy 350 TBI. You know you are in for a treat when the product you ordered lasts longer than expected, all the while functioning at an incredibly high performance. Next step up would be a set of cast iron Vortec Heads ($259 each brand spankin' new) and a GMPP TBI intake manifold (another $250) to fit the new heads and TBI unit. Discussion Starter · #1 · Nov 3, 2010. take the TBI and those stock heads, and throw them in the trash. oil is at 40psi at idle and blows no blue smoke. The other way to get more power out of the TBI engine is to replace the heads. You can easily get 300-340 hp. 400 from the TBI motor is a pipe dream. Sometimes, it can send false signals that cause the computer to retard your timing. I think the early tbi 350 is about 190 hp, The cpi vortec v6 on the other hand is 225 hp if im not mistaken. I have been told that the TBI unit will also need to be bored out a bit more . 7L) Chevy Throttle Body Injectioned (T. from 250hp to 260hp the fuel pressure should be bumped up to 13-14psi on stock 350 truck injectors which will change their flow rating to 60lb/hr. Defective Ignition System FAQs: What does 350 TBI mean?. Then you need to either buy a TBI intake for Vortec heads, or an adapter plate (Holley makes one) to fit the stock TBI onto the Vortec intake. No sense in spending money on a 350 just to yank it for the LS later. My v6 is plenty for most everything. You will need a lil more cam to reach your goal as well & maybe carb. At wide-open throttle, the computer switches to its base fuel map and the additional fuel pressure will increase fuel flow and (assuming the engine needs the additional fuel) will increase power. engine swap, chevy tbi 305 to tbi 350. 300hp from a 350 is easy, regardless of what induction you use. Do the ultimate TBI mods, headers, an intake with an adapter, and Vortecs really are a good idea. I was getting some backfire through the throttle body so I retarded the timing a bit by rotating the distributor a few degrees. Horse power Torque RPM. Mobility chair,comes apart for easy transportation and storage if needed, swivel's to both left & right to get out of the chair, brand new battery costing £100 purchased in December 2022 from Snowdrop mobility Haverfordwest. It has hooker headers and 3" dual exhaust and turbo packs. I did this on my exwifes 454SS back in 03. It's all someones definition of get up and go. First start with a bored 350 tbi. For roller cam engines use a new best brand distributor you can get at your local autoparts store for a 1992 Camaro 350 TPI Z28 which also uses a flat tappet camshaft. It all depends on exactly what you want to do with the car. It's 4500lbs with a stock converter, 3. used a T70 off an 11 liter detroit. Chevy 350 TBI Bogs On Acceleration [9 Easy Solutions] 01. Thenadd Vortec heads, GM intake and a new cam and you've got something. Add a cam swap and headers and you might get to 350, but probably more like 300-325. Spark Plugs Get Worn Out 03. A Corvette TV sleeve and plunger will give WOT 3-4 shifts. Aftermarket heads for the SBC are a dime a dozen. Filter Screens Get Gummed Up 04. A5- brn/wht- SES (service eng soon) light. with a Performer and or other aluminum intake. The 350 will probley have more torque though. Keep the oil clean and injector cleaner at every oil change and she will run for a very long time. Welcome to the group by the way!. The truck put down a respectable est. 300hp out of SBC is nothing. The second most important number to look for is the lobe seperation, which is the distance in degrees, as measured on the cam, between the point of peak lift on the intake lobe and the peak lift on the exhaust lobe. I'm more concerned about a higher torque rating rather than high horsepower. Also, check out the other sensors like the 02 sensor that controls the fuel management of ECM. 3 engine with 4L60-E Tranny and wiring harnase, computer, motor mounts and all acceries such as A/C compressor, alternator, power steering pump ect. A 1998 GMC with a 383, Vortec iron L31 heads, GM LT4 Hotcam with 218°/228° duration at 0. I just finished upgrading the top end on my 1991 Chevy K1500 5. You are talking about increasing the horsepower by almost 50% compared to the stock TBI motor. It won't need a cat converter in a 53 truck, he can also add duel exhaust. I have a 95 Chevy Silverado 4X4 that has the 350 TBI engine and I recently purchased a 5. The MAP sensor too can be the reason behind if it doesn’t pick readings correctly under light accelerations. Eliminate the factory Y pipe and go with the flowmaster piece he recommends. TBI mods, how to get the most power and Horse Power from your TBI. Jet chip, K&N FIPK, Edelbrock headers and a flow through exhaust. 1991 Chevy pickup 350 was rated at 210 HP. You can port the TBI to get more flow but you will always fight the low fuel pressure. Something like a 290 Hp 350 is a good start. The stock small block tbi's only flow about 450cfm. L-31 Vortec Heads, Edelbrock Cam & Intake, Holley 650, Flowtech Headers, Magnaflow exh. heck a local gm dealer retrofits the ht383 into tbi trucks, and can make them pass emmissions if you want, cat and all ( its all in the tuning, the right fuel mixture picks up your power and drops your tailpipe gases at the same time, the ht383 can even be run with the stock 350 chip and tbi, its been done on a local truck and it runs fine), mind …. IMO 300 with mods is more than possible, but after that you need a well thought plan that includes heads, cam, exhaust, and fuel system - this means alot more jing ($$). 350 EFI TBI Mods, cam, heads, intake, tune, 383?. The 350 TBI is a V8 engine that was first introduced in 1985. You need this set of pistons if using your 76 cc GM heads. Moser and Yukon has some really nice 8. The motor is a 350 TBI. Horse power Torque RPM. I got a 350 TBI that I want to convert to carbureted, I’m wanting to make good amount of power around 400 HP, this would be my first time doing this and wanna know what parts are needed to make that power with a 350, such as new heads or cam and which are best to make that happen, Thanks for any advice or help. Given your current TBI uses 60 pound per hour injectors the power limitation they can feed fuel for is 120 pounds per hour divided by. The fp regulator is in your TBI but is easy to repair. i forgot to mention that i also changed the plugs and wires, also the cap and . With the quality components we use, roller cam, roller lifters, and the machining and balancing processes we offer it’s a package that is longer lasting than a stock engine. I want more power out of my TBI 350. 030-over, honed, and decked in preparation for. 25:1 compression and hydraulic lifters. Mega Millions jackpot now $1. I am helping a friend build a mud racing truck: 87' tbi 350. I think the early tbi 350 is about 190 hp, The cpi vortec v6 on the other hand is 225 hp if im not mistaken. Ordered this replacement 350 for my 1994 Suburban, came after a 3 month backlog via truck freight to my driveway, installed it myself with some misery but I got it in and it runs great. I have a 97 Maxum 2100SR with the 350 EFI/TBI engine in it. Disconnect the oxygen sensor wiring harness from the sensor. just match up you cam/heads/intake like normal and put a upgraded tbi unit on top of it. A stock 91 Chevy truck can easily break any speed limit in North America. GM uses RPO codes, or Regular Production Option, to identify its engines; Chevy 350 engine codes are stamped near the cylinder head on the passenger side, where the alternator may hide it. what you do to a 91 sbc 350 tbi for more power. Standard Motor Products 1704 TBI Kit. Those heads will run out of breath by 4500 RPM. The first try should be an adjustable pressure regulator, turn up the pressure a pound or 2. At some point my 190HP K3500 is going to get a shot to boost power, I don't want to dump any money into the engine until I get some serious facts, not totally nuts about a Supercharger (unless I see Showblazers at some point and. It really chokes the engine of air. Run with a stock cam and two-barrel Rochester carb, the mild 350 produced 246 hp and 364 lb-ft of torque. You can make your stock fuel pressure regulator adjustable in under 30 minutes, or you can buy an aftermarket unit for $70. GM Performance Parts ''Base'' 350 HO Crate Engine This engine doesn't sacrifice power or durability. Brake Hose, Lines & Fittings Master Cylinders & Brake Boosters Ring and Pinion Brake Rotors Brake Calipers Differential Brake Pads Line Lock / Roll Control Kits & Components Brake Fluid Pedals Brake Tools Driveshafts Emergency Brake Proportioning Valves and Balance Bars Spools Vacuum Pumps & Vacuum Canisters Yokes - Transmission & Pinion U-Joints. Locate the oxygen sensor on your exhaust pipe, just upstream of the muffler. Carbureted Engine Combinations and Power (John Myers. I think the early tbi 350 is about 190 hp, The cpi vortec v6 on the other hand is 225 hp if im not mistaken. take the TBI and those stock heads, and throw them in the trash. Chevy 350 TBI Bogs On Acceleration [9 Easy Solutions] 01. The stock small block tbi's only flow about 450cfm. 42 tru trac lock up rear would be fine. The truck would downshift from 3rd to 2nd to get the RPM up, but it didn't actually gain any power in fact, it continued to slow down while maintaining 3K rpm definitely didn't feel right at all. Tools required are a multimeter, and a small blade or a knife to slightly nick. It was used in the Chevrolet Camaro and the Pontiac Firebird. It was a TBI engine to begin with, swapped it to blowthrough. The higher the lobe seperation number, the better the vacuum signal, the broader the powerband, and the better the idle quality. If you want it stong enough to withstand a 500 hp. Basically everything else is stock. So I was driving it and at a stop light just died on me with no warning, got it jumped about an hour later and it started. Smartest power/efficiency upgrade for 94 TBI 350. How to Get More Horsepower for the 1994 GMC 5. 1988 Chevy C-3500 2wd (no pic) 350 c. Get you a bored our TBI and intake, or use a TBI adapter to a 4bbl intake. 1994 chevy P/U 1500 Sportside 330 H. The base universal STS kit is like $2k +fuel system, tuning etc on top of that, a LS swap is easy as cake, and you can do a swap for a little more than half that easily including price of the engine and wiring harness. The Vortec is always a good choice for these. The stock 19 lb/hr poppet injectors are good for around 330 rwhp or 400 crank hp. If you go tbi, do yourself a favor and get a better cam. Frankly, the easiest way to make 400 to 425 horsepower would be to buy a 5. Moreover, the fuel pumps have a limited lifetime. these are the few things that i have done to the truck so far. 95 K2500 Silverado 350 ex cab. First start with a bored 350 tbi. The 350 TBI is also found in some trucks and SUVs. Run with a stock cam and two-barrel Rochester carb, the mild 350 produced 246 hp and 364 lb-ft of torque. Once back on the flat surface, it picked right up again and was cruising at highway speed no problem. Can I make 400tq out of a TBI 350?. Use Brian's 18# fuel pressure regulator spring. I would get rid of the TBI and put a performer intake and a rebuilt quadrajet or if bucks are scarce . I have been using a FULL BOAR SS muffler off ebay which are stainless and cheap and flow well but not going to be a huge gain in power. With the quality components we use, roller cam, roller lifters, and the machining and balancing processes we offer it’s a package that is longer lasting than a stock engine. you can do the ultimate TBI mods to the stock 42mm TBI unit and get that air flow up to 500cfm without increasing that bore diameter which is plenty for any 305 engine that you can run with TBI. Your wiring harness will need to match the TC, red/blue for DBC & green/blue for DBW. A 454 tbi wont work unless you get some custom intake for it i think. Flip the stock manifolds build a Y pipe and be done. Here's tax bill if you win. The Antelope has some VERY approachable geometry and will provide a comfortable ride for quite a few riders out there! The standover height is only 16”, which makes it easy to get on and off. 91 350 TBI rough idle and no power at all. The biggest TBI injector that was ever made was the. A1- grn/wht- this wire is used to energize the fuel pump relay. Filter Screens Get Gummed Up 04. You may face long odds of hitting the Mega Millions jackpot — now worth $1. 150 Wet Nitrous Holly kit w/t external full cell. The Vortecs will flow more and be more efficient, but the TBI is only good for ~520 cfm @ 3" IIRC. 1988 Chevy C-3500 2wd (no pic) 350 c. I just had my intake bored to match my bigger tbi. If you want power get good headers, good intake and cam, and vortec heads. Car Craft worked a 350 TBI truck over a few years ago and they saw some impressive power gains from rather odd items like a device they called "the mixing bowl" if memory serves, a filter adapter that tries to feed air through the top of the TBI unit better than without. This is my first post on GMFS and was wondering if anyone could help me out. Southern Pride said: Yeah but I'm on a tight budget to even try to do this. The spacer takes the place of your original gasket - no gasket required GM TBI power up kit. Welcome to our Shallow Creek Complex where each townhome is approx. Here’s what the initial tax bill would be, and how much more you may owe. I know the 383 build up is popular and Speedbumps has one. The 300HP TBI 350 challenge. HOW TO: MAKE SBC POWER WITH BASIC BOLT ONS (305, 327 & 350). Using your 1993 GM heads will need some work, mild porting to get them to breathe better. I am looking to rebuild my tired 1990 350 tbi to get better performance and speed out of my rig as a tranny swap on my 4x4 seems to be far more expensive and extensive. Then go to tbi chips for the tune. Dont mess with the spacers or cheap chips on ebay. (optional) This is a ground from the ECM to control the EGR relay. Opens up the airflow and cools the intake charge. as for the engine now days your better off. The following are a few tricks you can apply to get more horsepower from your 350 engine: Change the exhaust system Replace the valve trains and camshaft Change the cylinder head polished Build a new motor and blueprint it Final words Hopefully, now you are aware of how to increase horsepower on a 350 engine. Then there's all the ECM tuning involved. The big blocks are closer to 670. It really chokes the engine of air. Rated 5 out of 5 by Kermit from Great stock type replacement 350. You carb change probably won't change that number at all. Chevy 350 TBI Bogs On Acceleration: 5 Reasons Why (With Fixes). Car Craft worked a 350 TBI truck over a few years ago and they saw some impressive power gains from rather odd items like a device they called "the mixing bowl" if memory serves, a filter adapter that tries to feed air through. The heads on this engine do not have EGR provision and to get that power number you need to use the Weiand 8150 intake that ATK sells or use edelbrock 2701 intake and then open center adapter from TBIPARTS. flywheel hp of 292 hp and 407 ft/lbs on. Three Ways to Pick Up Power with Your 350 Chevy Engine. How to Make Power with a Chevy TBI V. Yeah the heads are junk and not many people turbo TBI's but that's why I'm asking.