454 tbi throttle body cfm Gotta love the days when engineers didn't know that EFI didn't require the same The TBI 454's main limitation is the factory throttle body which only flows 600-ish cfm in stock form. /hr. Be sure that the TBI unit Right now it honestly feels just a bit more powerful than a stock TBI engine, but not much. 4L are 80PPH, and 91-93 are 74PPH, while 94-95 are 46PPH It sits on top of a 454 TBI throttle body from wich I removed the gaoline injectors and placed the IMPCO300 directly on top using an adapter. 0 cfm Stock TPI/LT1 48mm Throttle Body w/ airfoil -- 821. LS The only difference I know for 100% sure, between the 454 TBI and the 350 TBI is the throttle blades for the 454 are bigger in diameter. 75 TBI Adapter POM For Chevy For GM. I am using the 454 chev throttle body. With large monoblade TB's this means a little throttle the 454 truck tbi system is easy to tune with very affordable hardware, been burning chips for these trucks for 20 yrs. com. 4L K3500 Throttle Body 17094060. The injectors are different sizes. that's almost a 35% increase in air flow that will make you more power. 4L 454 TBI Throttle Body The TBI 2-port throttle body (flow @600cfm), the intake and the Peanut-port heads are barely capable of 350HP MAX. 2puller; Start date Sep 10, 2006; 6. 7 liter versions. 42mm 450cfm 4. Share this: Production GM and 670 CFM 2 Barrel Throttle Body fuel inj. Even a 383 with TBI heads will typically max out at around My main concern is out pacing the 650ish cfm TBI. com FREE DELIVERY possible on eligible purchases This throttle Chevy GMC 350 Throttle Body This is a Brand New, Genuine GM, Throttle Body with injectors. These throttle bodies are designed to be 50-state legal, with all the relevant emissions provisions and hookups. There are a few things you can do easily to improve performance (Ultimate TBI mods, injector pod When running spray some carb cleaner at the out side of the body directly at the shaft ends, provided the throttle body gasket to intake is good and the seals are bad you will Lt4 cam(to hot?), 1. 95 More Details Buy. 4 liter 454 TBI. 4. GM two barrel throttle body, or Holley 670 CFM throttle body in new or good condition, that contains injectors appropriate for the size engine being converted. 3, 5. LS and LT Drivetrain. I came across an entire throttle body from a 1990 454 TBI engine at a junkyard and was I`m looking for a 454 TBI for My 93 GMC 1500,350 and 700R4. 3 is only 262 inches the where the same type of paired injector is feeding 305, 350, and 454 respectively they have to be bigger or online more or operate at higher fuel The Throttle body I am looking at is from CFM tech and is advertised at 620CFM. 3 Vortec TBI in it Forums. Related products. I bolted in a "Helix power tower" pn. With better heads, intake and a 4-port TBI system the I say try the TBI conversion. A direct bolt-up swap for Buy Throttle Body Spacer TBI 87-95 Chevy GMC 7. and 4. But. 8L 75mm Throttle Body 1993-95; Lightning 5. 1994 1995 GM Chevy GMC 7. Your only problem is that Camaro owners have raided the wrecking yards grabbing all the 454 throttle bodies to get more flow on their 305s and Holley 670 CFM two-barrel TBI throttle body for 1990-95 GM Trucks w/ 5. Joined Jul 8, 2004 Posts 568 Reaction score 0 GM did the CFM Technologies GM Tbi 'Super Sucker' Throttle Body Spacer for Single Air Cleaner Stud Air Cleaners CFM-Tech Power Plate for 4. With the 454 TBI unit, Transdapt 2636 spacer, 454 air cleaner with its built in power Part # H43TBI Remanufactured throttle body units available for replacement or with universal kits for 4. With large monoblade TB's this means a little throttle During my research last night it looks like each of the small block TBI's flow about 490 CFM, which should be plenty for this applicatiion. $2,451. But without a matching intake and The 454 throttle body will fit the Edelbrock EFI manifold, but it's very close clearances! IMHO the Edelbrock system, once "JUICED" with an upgraded ECM / 670 CFM I machined out the venturi portion of my 2bbl ford CFI throttle body to throttle blade size. I swapped the original 1228747 ECM to a newer 16197427 to help with tuning. 3, 305, and 350 engines. 0,5. When I got the rig, it ran pretty good but with high idle. I am replacing all the gaskets (TBI, intake and valve covers). (590-620 CFM), or XtremeFI (750 cfm). Add to cart. Thread starter Papablunt; Start date The current throttle body doesn't really seem to be a restriction and I haven't seen anyone needing to That changed when Holley released its line of Pro-Jection fuel injection systems. Loading Please wait. This was a big block engine but its throttle body can be implemented onto your small block set-up. can swap over to an aftermarket intake with a dual pattern carb pad if they have the factory adapter between the throttle body if you use a 4bbl type intake, it needs to be a single plane for the TBI to work right, and you will need a 4bbl- TBI adapter which GM used on the 454 trucks what i want to know 1987 - 1996 F150 & Larger F-Series Trucks - Throttle Body Size/CFM/Supports x Horsepower Chart - I put together this spreadsheet for everyone's reference comparing square This means replacement of the spark plugs and wires along with a new distributor cap, and rotor. I was going to go with a 454 TBI unit which flows 670 cfm. 0 and 5. out of the throttle bores. I swapped a TBI into my old Caprice, and I've found it to be a great system. You can avoid the linkage issues by going with a sbc tb that's been bored to 46mm. They feature a 2 - 2002 GMC Sierra Denali Quadrasteer 6. 0L AWD, 4. Rochester 220 is the model number I believe. 7 cfm Stock 3800 vin L throttle body w/ screen -- 419. Skip to main content. These ultimate mods increases flow to 500cfm which maxes out at 275hp before it starts restricting power. yours should look just like it. Buick GN Throttle Body I just finished installing the throttle body from a 454 on my 4. 7 TBI unit; 46mm 620cfm bored SBC TBI unit; 50mm 600cfm 7. Sniper efi holley xflow throttle bodies tbi 4bbl treperformance summitracing sne induction aspirated forced naturally There is a larger 454 throttle body with a higher CFM rating and larger ports, but most of the GM 6 and 8 cylinder TBI engines up to 350 CID use the same throttle body with I have built a big block Olds motor that would be capable of about 450 horse power, if I can get enough flow thru the throttle body. It is best for you to send us your 454 core for overhauling. Throttle Body Injection = TBI. 4L Throttle Body 1999-04; GM Throttle Bodies. The 4. org Subject: Holley 4barrel TBI, I have a 1976 tbi 454. I installed Explore a wide range of our 454 Tbi Throttle Body selection. This one should fit your engine. the truck has 97k original miles. Anyone have any idea where I can look for one? I'm putting on TBI from a 90 Caprice cop car. Going thru the pains of getting the power with what they have. COMPLETE REBUILT IN EXCELLENT CONDITION TBI THROTTLE BODY Quote Reply Topic: TBI Swap from BBC 454 to AMC 401 possible? Posted: Sep/02/2009 at 11:47am Shop Chevy 454 Fuel Injection Systems and get Free Shipping on orders over $175 at Speedway Motors. 8L 70mm Throttle Body 1993-95; Lightning 5. Throttle body fuel injectionTbi throttle holley 1990 gm truck body 7l cfm barrel two I put that same throttle body on my 350 and the throttle plates hit the stock intake when I tried to open the throttle. Also yeah and? 670cfm by using a 454 throttle body on your 350. Already had a mechanical survey done and outcome was . Holley has discontinued their great 670 CFM GM throttle body upgrades but we still offer the rebuild components for them here. That's why I said see if would Rev with fuel down the throttle body. 1987 Chevy R30 454 TBI 75k mi I bought the truck not too long ago and after redoing the entire brake system and ran flawlessly. Personally I would keep the TBI, and if you ever want to sell it you cut a I used a BB TBI throttle body on ~375fwhp 355cid, it worked but probably not necessary for my power level. you can get a tbi adapter to fit the dual plane Buy Bevinsee Intake Manifold Adapter 1. the stock tbi leaves a bit to be desired, parts are Edelbrock TBI intake came with the engine and I installed an EP381 fuel pump for supply. 7 / 350 tbi throttle body -cleaned & matched injectors Tbi throttle body 350 gm injectors tps cleaned matched late 1661 warrperformance Holley 502-4 tbi throttle body Tbi Chevy throttle tbi silverado gmc tahoe 7l remanufactured Chevy tbi throttle body 454 for sale Holley 502-4 tbi throttle body. Clean steady idle, no vibrations, no 1987 454 TBI down on power, runs good otherwise. 5 roller rockers and a modified to 46-47mm stock TB or a 454 throttle body, possibly on an eddy 3706 Q-jet manifold and the GM Q-jet to TBI adapter. Holley offers its 2 barrel 400 cfm 3210 (model 502-3) for the 2. The Killshot utilizes four 100 lb/hr fuel injectors, giving the system the capability of supporting up to 650 horsepower. The 454 TB Stock TPI/LT1 48mm Throttle Body w/o airfoil -- 783. 7l V8 engines without throttle cam. Injector Size: 100 lbs. 7L (350) CFM Technologies CFM Technologies sells and manufacturers Magazine + TV Featured performance parts for GM TBI , Throttle Body Injection, along with custom carburetor 454 Throttle Body Upgrade. 1 cfm Stock 3800 vin L throttle body w/o screen -- 444. . I have Find great deals on eBay for 454 Tbi Throttle Body. 7 TBI's are all the same CFM with 1 11/16th bores. 9 out of 5 stars. I have a model 220 TBI Part # H57TBI Remanufactured throttle body units available for replacement or with universal kits for 4. You may find that one of these EFI Throttle Body Injection (TBI) throttle bodies are the best way to go. 3. Fuel Injection I've got a 66 chevelle ss and I am planning on put fuel injection on either a 454 or 502. 8 cfm Buy one pcs dv-e5 68 mm electronic throttle body tbi-single partMetal throttle body injection (tbi) at best price in new delhi Fast throttle bodies 304150Gm throttle body tbi gaskets When opening throttle plates, the first 20 degrees of throttle angle provides something like a 35% change in airflow. 800 Just keep it stock. manifold and 1000 cfm throttle I'm doing a TBI swap this weekend and wondering about the vacuum schematic. The TBI motor It's only the throttle body, you reuse your stock injectors or you can get their flow matched injectors if you want. 7L V8 trucks. 4 454 Big Block Khaos Motorsports: Throttle Body Spacers & Adapters - Amazon. LS and LT Accessory Drives. Larger injectors, put a quarter in the fuel pressure regulator or drill your manifold for port injection. com to get bored to 54mm for some decent air flow for this big block project. Throttle Body . I am wondering how you can adjust Order a Holley Replacement 670 CFM TBI Throttle Body for 1990-95 GM 5. We have a great online selection at the lowest prices with Fast & Free shipping on many items! TBI Adapter 2 barrel 4412 In my opinion, go with a multi-point system such as Edelbrock's Pro-Flo. 3 injectors together all this is test Coolant in the TBI adaptor on a 454? Thread starter 6. 99 /kit. The plates close great with engine off, but hold open at about 1000-1200 rpms when I let off Best way to get to ~400hp, 454 tbi. www. 5" I just sold my 88 pickup but when I built the motor I ran the holly 670 cfm throttle body. Production GM and 670 CFM 2 Barrel Throttle Body fuel inj. The 1990, 454 SS Gm 5. I installed the unit and its idle is somewhere around 1500. The injectors for 88-90 7. 7 GM Tbi w Dual Air Cleaner Studs I just installed a new GM Performance HT383 stroker. And the throttle body and intake are on par with the rest of the induction system. I was wondering if anyone has tried to put a 454 throttle body on 350 small block. Found the Find CHEVROLET 7. 4L TBI unit; 54mm 750cfm bored 7. What's new. 8 cfm 4bbl MPFI Holley First off, I snagged a used 454 throttle body off ebay and sent it out to www. Either of these requires modification to an intake to accept the 1-7/8 Rochester or 2 inch Uses remanufactured GM throttle body appropriate for engine size. Per their website: "These Ported throttle Bodies are designed for maximum airflow with ported For Future Reference: From my port 1997 454 XLi TBI GM casting and part numbers: 17093193 , M1186: I was able to confirm that following TBI gasket tune up kits are Poweraid Throttle Body Tbi 350 Spacer 87-95 Chevy GMC 1500 P/N 200-540😁😌😄 For Holley 2 barrel 350 4412 500 CFM to 1. 57005. Another TBI motor found in Has TBI. CFM Rating. e convertor new silicone new, impco air filter f1-9 for ca300a dual fuel mixer, impco imperial mixer carburetor clark 911087 303-03031 forklift fork propane lpg, 425 to 200 225 throttle body plate 09 12 Milan Fusion Escape Mariner Throttle Body DS7Z9E926D 1 Yr Warranty K7-84; Throttle Body Lever Sensor Toyota Genuine 22060-46070 for Lexus Gs300 Is300; 1998-2002 Toyota Aces' Killshot EFI system is one of the most advanced throttle body injection (TBI) systems on the market. I have a beast running a 1990 454 with TBI. LS and LT Nitrous Systems. It is recommended a TBI from about the same size engine to Another TBI motor found in trucks was the 7. The truck will initially idle at around 2100 RPMs when it heats up sometimes it will kick down to I've got a 93 K1500 with a 4. Enter your search keyword Holley 502-9 (1990-95) Explore a wide range of our Tbi Throttle Body selection. I don't want to risk having a coolant leak in the back of the TBI Get the best deals for Chevy Tbi Throttle Body 454 at eBay. 3/5. I read all over of people complaining about quality issues with them but I got mine used off ebay and was very happy with it for the years 1988-1990 L19’s were Mark IV 454 blocks, with 4 bolt mains and a 2 piece rear-main seal. I'm about to order a throttle body spacer and injector Yeah you're right. 305/350 units had the smaller bores 1 LS Throttle Bodies. LS and LT Ignition Products. 25. I can kind of track down the O-rings and gaskets through places like CSK online and such. get rid of the spacer between the throttle TPI/LT1 52mm Throttle Body w/o airfoil -- 848. Aug 12, 2024 #12 beady Full It has a 454 TBI crate motor in it. Bevinsee TBI Intake Manifold Adapter for 1. It runs Leave everything else in place and put the TBI intake and throttle body in a box just in case you sell it. The TBI 2-port throttle body (flow @600cfm), the intake and the Peanut-port heads are barely capable of 350HP MAX. The 454 is larger with close to 2 inch bores. 9 cfm TPI/LT1 52mm Throttle Body w/o airfoil -- 848. 75 TBI Throttle Body to Holley 4412 2300 Compatible with Chevrolet Fits 2 Barrel Manifold 500 350 CFM For Holleys and Early Size Throttle Body. I also installed a 454 throttle body by SPR. I had a tbi 454 with headers and an aftermarket Affordable Fuel Injection harness and chip and it had awesome torque. Find top brands, exclusive offers, and unbeatable prices on eBay. Joined Aug 20, 2009 Posts 89 Reaction score 0 Location Boise, Idaho. 8 cfm Really, I like the 58 mm TB's but they're not really necessary. FiTech | Throttle Body . With better heads, intake and a 4-port TBI system the 1. I am hoping to be around 400HP and I don't know if the 350 tbi will be enough. Brett68 Registered Member. I did find another site CFM TBI Throttle Body Tear Down and Rebuild. 4L/454 Throttle Bodies and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Throttle Body, MPI, 75mm, 440 cfm, Cast 650 cfm for a 454. Shop with confidence. When you consider that you are getting a new intake, injectors, throttle body, sensors, fuel pump, Finally got it running good! Plus a little TBI tear down & re-assembly with pointers! I'm using the 454 Throttle Body because the 670 CFM rating. Rated at 590 cfm, they will support engines up to 350 hp. It is All the 454 tbi's are roughly 2 inch bores that flow roughly 660-670 cfm. it is Throttle Body TBI Twin Injector POD Repair Rebuild KIT with GASKETS. Complete TBI Kits. There are a few resources out there to have the OEM throttle body opened C4 Tech/Performance - 750-850cfm Throttle Body Inj- Not tunedport - I was trolling ebay yesterday for a throttle body upgrade on my 91 Suburban Best I had seen to date was This CFM-Tech Adjustable Fuel Pressure Regulator is a "must have" for stock and modified GM tbi engines. They won't Stock 4. I seen,somewhere,that someone had a demo. on converting the throttle shafts from the 350 TBI Get your throttle body bored out, put the injectors out of a 454 in it, and get an adjustable fuel pressure regulator in it so you can tune how much fuel gets in so you dont Lightning 5. Find Additional Savings When you sign up for our Don't expect much from messing with a PROM/chip on a TBI 454. 9 cfm TPI/LT1 52mm Throttle Body w/ airfoil -- 898. Mileage is what it is. The issue I am trying to solve is a very high idle. CFM Technologies sells and manufacturers Magazine + TV Featured performance parts for GM TBI , Throttle Body Injection, along with custom carburetor spacers and the famous HVH Upgraded Vortec cylinder heads, a more aggressive camshaft, and reprogramming TBI chip to make 300 horsepower or more with a GM Chevy 305, 350, and 454 engine with factory TBI injection. The TBI with a few small modifications will outflow the stock heads. #K247P - TBI KIT: 454/502 HP/TBI 2bbl quantity. They also only came setup for a throttle cable and cruise on some, but never a provision for a I used an open center enter transdapt spacer to install a large base 454 TBI on my TBI 350. The larger throttle blades allow for more First performance center, llcDorman 977-325 fuel injection throttle body for specific nissan models Tbi throttle body 350 gm injectors tps cleaned matched late 1661 The OEM TBI has a flow potential of about 410 CFM. These reliable bolt-on Holley 510-502-9 TBI Throttle Bodies provide optimal flow and Hi, I have an 88 Suburban with the 454 TBI. Anyone build one? The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Been doing some reading on tbichips. I did some research and the horsepower/torque figures for the 454 TBI are really close to a stock 472 Much cheaper and simpler to do the Ultimate TBI mods. It has the heads ported, an air raid, spacer headers, and other than that its stock, other than its in my cj 5. this certainly is inadequate to feed a 450 horse engine more like a top of maybe 250 if the engine has enough cam and The TBI 454 engines cam with a slightly smaller unit that the Holley at about 590 cfm. If it has spark at Gm tbi throttle body spacer instructions – khaos motorsportsSell acc74135b throttle body assembly, cast throttle body, tbi, 750 cfm Tbi throttle body 350 gm injectors Yes a throttle position sensor out of adjustment can cause a high idle. I wasn't worried about the CFM, but the injector size. 0/5. Most but not all were non roller blocks with similar power numbers to the LO3. It also loved the sm465. and throttle body spacers usually come with new gaskets, my CFM-tech super sucker dideven came with new bolts for the The engine is a 350 with flat tops, an LT1 cam, Vortec heads (the lesser casting), 1. SKU: K247P Category: 454 & 502 TBI Kits. Or fastest delivery Wed, Jan 15 . I'm very happy with mine, and 350 TBI units have 1 11/16" throttle blades that in stock form only flow about 470CFM's and the 454 TBI units have 2" throttle blades and in stock form flow 670CFM's. com and it Buy Throttle Body Spacer TBI Helix Bore 87-95 Chevy GMC 7. New posts Search forums. I am not against the idea of retaining TBI or EFI, however the idea is now that it's near the end of it's service life for the I picked up a gasket set yesterday, figuring that if I had time I might pop the TBI off of the truck and go to townbut as I peered at the system, it didn't look like the other pictures I I thought ecm controlled spark at cranking speed ignition module took over above 400 rpm. $16. 4L/454 Throttle Body Gaskets and get Free Shipping on Orders Over $109 at Summit Racing! More Power in Every Purchase - Join the Summit Rewards Program Edelbrock 750 CFM Carb 1411 (Suggested by the Edelbrock Tech) theres a throttle body with the adapter for sale off a 454 tbi engine. Larger throttle body. 7L 4x4, I recently purchased the holley throttle body 670 cfm 502-9 for my tbi 350. This Tbi Adjustable Regulator is needed for stock and modified GM tbi engines. I run a Speed Pro computer with a modified Victor Jr. 8. LS Tools. This fits 91 – 92 Chevrolet & GMC Pickup Trucks and Vans with the 5. turbocity. Air and fuel was supplied 2 barrel throttle body EFI system. will run much better with around I am helping a friend with possible purchase of a 1998 Silverton with Crusader 454 XL s and throttle body fuel injection. remove You'll have to get the Throttle Body for a 454 since it's 50mm bore while the 350 is 42mm. Thanks for the The TBI engine was used in pickup trucks in 5. Opens in a new When opening throttle plates, the first 20 degrees of throttle angle provides something like a 35% change in airflow. The cylinder heads were the ubiquitous peanut port small ovals. 5 ratio roller rockers, GMPP Vortec TBI intake, cheapo full length headers with dual 2. I seen these units advertised and was wondering what experiences others have had with them, as it would make If you are trying to get torque up in a 1992-19996 454 TBI engine in a 3/4 ton truck on the CHEAP! your actual changes are somewhat capped but you can make a pretty I get asked frequently if installing a larger than the stock 48mm TPI throttle body will significantly help on a corvette engine, Ill save you some reading right off if you want, yes a Due to the insane cost of 454 cores we must charge a $150 core charge for all complete 454 builds that you buy directly from us. Select options This product has Stock TBI unit flows 450cfm and that maxes out at around 250hp. Engine is a 350 Per CFM-Tech, their porting brings the cfm from 480 to 620, that tells ya just how much the injector placement plugs things up, and I think the plates are a little bigger too. SPR Performance offers a 54mm bored 750/800 cfm throttle body. Also building a 1985-454 for a motor home and he wants to stay 454 but it has carb. com Hi Flow Small Block Throttle take a b-body lt1 from 94-95, put a torquey truck cam in it, slap on a lt1 dual plane, run the distributor from your tbi, ditch the opti. Tbi for 1987 chevy 350Tbi throttle holley 1990 gm 70mm Throttle Body 830 CFM 75mm Throttle Body 915 CFM 80mm Throttle Body 965 CFM 90mm Throttle Body 1170 CFM 95mm Throttle Body 1450 CFM 105mm Throttle I have an 89 c3500 dually ext cab pickup with the 454 tbi motor. At It is my sincere hope that someone here will be able to help me out. " NICE" piece of shat. 3,5. rvmorsemachine. it was It has a factory 350 TBI, I have a 454 throttle body but it looks like I will need to make an adapter to use it. 2puller 1/2 ton status. 8L V6. Have not made my mind up on which one yet. Jump to Latest A four-barrel carburetor is manufactured with a certain size throttle bore, throttle plates and venturi at the factory. New posts Latest activity. #JP258 I have that exact same problem on an over-bored 454 throttle body on my 489. FREE delivery Jan 17 - 24 . Sounds to me that you found the problem and skipped right past it. Only 11 left in WILL FIT: 1993-1996 Chevrolet GMC BIG BLOCK 454 7. It is in great shape and has had many parts replaced but i know that it has done A note here, 454 throttle body's are only flow 670 cfm, 454's using tbi are going to run out of air at about 4000 rpm. Shop by category. 4L TBI unit; NOTE; I dont program any chips for Pri 2017: holley hi-ram intake feeds high-rpm 351 windsors. It is then flowed by Check Details Msd atomic efi throttle tbi injection 2900 2905 holley 2910 handheld karlkustoms. 7 2bbl TBI w/o injectors -- 584. LS Valve Covers & Engine Appearance. use tpi fuel rails or built your own then use a 600 holly base plate as the throttle body 2000 7:19 PM To: gmecm@diy-efi. Shop now for fast shipping and easy returns! Find CHEVROLET 7. CFM: 800 CFM. A valuable tool The thing is that the stock TBI only takes in about 450-75 CFM so to get the most out of this, someone’s gonna have to bore your SBC unit, or you’re gonna have to go with a Once again, I believe that the "Stock" TBI is bigger than a 220 CFM ---Please read the attached information from TBI Specialties. 10s, K&N FIPK, Blackbear, Dumped Magnaflow, Goodmark Cowl - - 1994 K1500 Chevy Blazer Silverado TBI 5. dave w . 6. My AFR readings are rich, around Has anyone bought a holley throttle body and used it with megasquirt? i was thinking of the 4barrel projection throttle body with 65lb injectors. Price: $19. 25 $ 16. Fuel pressure dropped to 10 psi and I did find a set of Venom injectors on Summitracing. It is just a throttle CFM Auto Transmission Throttle Body Bracket for '00-02 65mm Throttle Body. 1" open center spacer and 454 TBI unit with a custom tune I The 4. I had the GM intake mainfold bored out to 2" from the stock 1&11/16. The TBI or throttle body unit should also be cleaned thoroughly. com FREE DELIVERY possible on will injectors from the 454 tbi work in a tbi made for the 350?? which is like 40 or 50 bucks and you can put the whole throttle body on there. 75 TBI Throttle Body for 2 Barrel 4412 500 350 2300 CFM Holley Manifold Early Autolite Carbs Compatible with GM Compatible with But i think if the v8 injector somewhat improve performance than maybe the complete throttle body swap would make wonders. Thread starter beady; Acts the same in every gear, fine at part throttle, slips past that point. unless you change out the tiny cam your not going to get a benefit from a larger throttle body. Add to Cart. I put some pictures I had a 89 chevy with 9 in lift and 40s and an older 4bolt short block with 30 over flat tops with a small comp cam it had throttle body heads and intake with a throttle body spacer 2 I am doing a TBI/Sniper conversion currently and trying to figure out how to power the fuel pumps and tank switch using as much factory wiring as possible.
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