305 TPI to 350 TPI
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
a) A 350 (also see below).
b) Depends on how much your defination of "much" is. To some, a 350 is "much".
c) No.
d) Knock sensor & module should be for a 350.
You should also have a 350 harmonic balancer. 19 lb 305 injectors can be used, but you should get an adjustable fuel pressure regulator (AFPR) so the pressure can be bumped up. 22lb 350 injectors could/should also be used and w/AFPR. Depending upon the year of your current engine vs. the 350, you may have to get a different flywheel (one-piece vs. two-piece rear main seal crank differences).
The plenum should be ported - doing so helps a 305, so definately should be done for a 350. Exhaust help (headers, y-pipe, hi-flow cat, cat-back) also does a 305 good, so do it for a 350 for sure.
Scared off yet? Good, get the catalogs and plastic out, and get that baby going!
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, WP 305 heads ported & polished, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
b) Depends on how much your defination of "much" is. To some, a 350 is "much".
c) No.
d) Knock sensor & module should be for a 350.
You should also have a 350 harmonic balancer. 19 lb 305 injectors can be used, but you should get an adjustable fuel pressure regulator (AFPR) so the pressure can be bumped up. 22lb 350 injectors could/should also be used and w/AFPR. Depending upon the year of your current engine vs. the 350, you may have to get a different flywheel (one-piece vs. two-piece rear main seal crank differences).
The plenum should be ported - doing so helps a 305, so definately should be done for a 350. Exhaust help (headers, y-pipe, hi-flow cat, cat-back) also does a 305 good, so do it for a 350 for sure.
Scared off yet? Good, get the catalogs and plastic out, and get that baby going!
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, WP 305 heads ported & polished, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
Member
Joined: Mar 2001
Posts: 255
Likes: 0
From: Beaver Dam, WI
Car: 1987 IROC-Z
Engine: 350
Transmission: T-5
the stock chip should work. worked in my car. the original angine was a 305, now a 350.
sunbound
[This message has been edited by sunbound (edited March 12, 2001).]
sunbound
[This message has been edited by sunbound (edited March 12, 2001).]
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