I have a 350 from an 85 blazer that i want to build up and throw in my 91RS. I want to keep the TBI, because i cant switch to carb in cali, and dont want the hassle of switching to TPI. What kind of heads/cam/intake combos will give me some high 12-low 13 et's? Feel free to post multiple combos that might get me there. Many opinions wanted

 

use my setup with a 2400stall and a 670 holley TBI.

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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 226/230 duration and .477/.480 lift. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter. Edelbrock TES, 3inch cat, flowmaster with single 2.5 inch exit.
13.24@104

 

you can check my signature for some ideas. after i get my gears and tires and maybe a custom chip, i should be well into the 13s hopefully. i am almost there now, so i odnt see why not.

-brian

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1991 Camaro RS - Ultra Blue Metallic, T-Tops
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GM 350 HO Crate Engine - Vortec Heads, Edelbrock Performer Vortec Intake, Holley 670 CFM Throttle Body, Open Air Cleaner w/14"x3" K&N, SLP 1 3/4" Stainless Headers, Edelbrock Victor Series Water Pump, March Unerdrive Pulleys, MSD 6AL, Blaster Coil, 8.5mm Super Conductors, Cap and Rotor, Hypertech Fan Switch & Thermomaster Chip, AC Delco Rapidfires, 3" Cat Back, Flowmaster 40 Series Muffler
700R4 - 2,400 Stall Converter, Vette Servo, Shift Kit, B&M Super Cooler
GM 10 Bolt -coming soon Auburn Pro Series Differential, Richmond 3.73s
Brian's 1991 RS Central NY F-Body Association
Join the Third Generation F-Body TBI Web Ring
z28boy@twcny.rr.com IM name: Z28 Boy

 

With a very good suspension and chassis setup you need a motor that makes 350 Hp and at least 350 ft-lb on a bad day. With a typical street setup you will need 400 Hp or more to make it to 12s.

Just as an example, my Corvette made 550 Hp and would trap speed at 120+ mph. On street tires the best time was 12.2 seconds. Making any mistakes in the run would put me at high 12s. If I fishtailed at all I'd be in the low 13s. On slicks it would run mid 11s. Think about that time spread. Suspension and tires is the key to making your goal. Just make the motor powerful enough to get you there.

 

you should also try to lose as much weight off your car as possible. that should help and should give you a little better mileage to boot