400tpi swapout
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400tpi swapout
I have a sbc400 to put in my 87 IROC.it has a 350tpi/350 turbo tranny.what parts can i reuse to save a few bux?can i use the flywheel,starter,balancer,etc...from the 350?also,which is the best head between the 350 centerbolt and the 305HO?thanx for all replies!!
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"Let's get to it,well let's do it!"
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"Let's get to it,well let's do it!"
Joined: Mar 2000
Posts: 43,187
Likes: 42
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
You cannot use flywheel or balancer and probably not starter.
Absolutely, possitively do not use the 305 heads on a 400! The puny valves & ports will choke the poor thing, and the small chambers will make the compression sky-high without mongo dished pistons. Even the 350 heads will make high compression, but that can be done - use thick head gaskets. Don't forget to drill the steam holes in the heads.
The TPI should be ported at a minimum. Shorter, fatter runners would also help, along with a larger TB.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet (Holley 3310 on the way), GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
Absolutely, possitively do not use the 305 heads on a 400! The puny valves & ports will choke the poor thing, and the small chambers will make the compression sky-high without mongo dished pistons. Even the 350 heads will make high compression, but that can be done - use thick head gaskets. Don't forget to drill the steam holes in the heads.
The TPI should be ported at a minimum. Shorter, fatter runners would also help, along with a larger TB.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet (Holley 3310 on the way), GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
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