I am currently building a 91 RS and I wanted to know if there are any performance upgrades for the TBI system. I am gettting the motor bored and balanced, rods, portting and polishing the heads and a comp cam. When it goes back into the car I'm using headers instead of the stock manifolds, and i already have a 3" flowmaster catback exhuast. I don't know if the stock TBI will give the engine enough fuel and air to run to its full potential. Everyone says to get a 350 but I want to do something different. 350's are like *******s everyone has one. I want a TBI 305 that has some serious *****! I'm trying to make the ultimate sleeper and any advice would be greatly appreciated,on the TBI system or what duration cam I should go with. I don't care about gas mileage, becuase it is just a project car, but I want the car to have a nasty lope when its idling and i want the most performance I can get and still be street legal. Like I said any help would be great!

 

I've heard that a 454 TBI unit will add a bit of performance.

The 454 TBI unit has 2" outlets, so make sure you get an intake (like the Holley Projection) that has 2" Inlets.

This is what I plan to do to my 305 TBI next.

Thomas

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1992 RS Camaro - Red
305-TBI/5 Speed Manual- 3.08 geared rear
1.6 Roller Rockers and Cam / Adjustable Fuel Regulator with high flow pump / Open Air K&N Filter / TBI Spacer / ADS Super Chip & custom burned Off-Road Only chip
Headers - Flow Master - dual chrome tips
adjustable Coni shocks & struts

 

check out turbocity.com they got some good TBI stuff like aspacers, throttle boddy's , new injectors, fuel pumps.. stuff like that

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91 camaro RS
- 305 TBI
Mods: Performer TBI intake, 1" TBI spacer, K+N, jet fan switch ,160 thermo,Accel control module, Jet Stage 2 chip, edelbrock TES headers, Compleate 3" Flowmaster exhaust, Edelbrock springs, KYB struts and shocks, 700R4 built by TSI, SLP tq converter, b+m trans cooler, white guage faces, megashifter..
next month: spohn LCA's and panhard rod, BMR relocation brackets, 323 gear

 

Once you get the engine in, put 350 injectors in and an adjustable fuel pressure regulator. Keep your stock TBI unit though, i dont think you will have any airflow problems with a 305, just fuel. Dont forget an open element if you dont already have one.

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*1989 RS
*Red, Daytona Turbo fiberglass hood, chrome 16x8 IROC wheels
*355 CID
*TPI ported plenum, SLp siamesed runners, Edelbrock high flow intake
*Edelbrock TES Headers (getting SLP 1 3/4 this summer)
*Richmond 3.73
Modded 700-R4, 2800 stall converter
NO recent time slips.