350 swap question
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Senior Member
Joined: Nov 2001
Posts: 648
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From: Newark, OH
Car: 1992 Camaro RS
Engine: 305 TBI
Transmission: 700R-4
350 swap question
my dad hasa 94 chevy pickup with a 350 in it and i am wonderin how much hp i would gain if i put that in my 86 sc z-28. oh yea am is the dude who told me my 305 h code engine had 150 hp? thanks
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86 sc z-28
305 ci around 150 hp prob lil more
my first car and the best one i will ever own.
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86 sc z-28
305 ci around 150 hp prob lil more
my first car and the best one i will ever own.
Joined: Mar 2000
Posts: 43,187
Likes: 46
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'd see a good bump up, probably into the 250 range, but ONLY if you improve the exhaust from your current system (and none of the truck stuff will fit). If you keep your current LG4 exhaust system, come on by after you put that 350 in, and we'll put on a show on how a little ol' 305 can spank a big bad 350.
You'll also have to do a little modifying of the intake manifold, since your piece has all of the mounting bolts at the same angle, and the '94 will have the center two bolts on each side at a different angle than the rest.
As for your current HP, an '86 Sports Coupe code H LG4 actually had 155 ponies. The Z28's, IROC's and Trans Am's had 165.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, 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 @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
You'll also have to do a little modifying of the intake manifold, since your piece has all of the mounting bolts at the same angle, and the '94 will have the center two bolts on each side at a different angle than the rest.
As for your current HP, an '86 Sports Coupe code H LG4 actually had 155 ponies. The Z28's, IROC's and Trans Am's had 165.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, 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 @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
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