Cam Questions
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Joined: Jan 2001
Posts: 254
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From: Bloomington, MN
Cam Questions
Okay, I know this may sound like a stupid question but please, I need help.. I have two bad motors. One in my friends car and one in mine. So we figure, hell lets do it ourself. I have done motor swaps before and rebuit motors and so has he. We feel that we have the ability to do it. Now we have never altered the "stuff" in the motor before. By stuff I mean cam. He just got a 350 "target" motor and we have no clue what heads are on there. How do I know how much lift I can put in the motor w/ the head/cam combo? I figure mine will work, ZZ-4 Head and ZZ-4 cam.. I don't know why that wouldn't work, if I am wrong though let me know.. Thanks!
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--Spyder--
1992 Camaro RS
LO3, T-56,centerforce clutch, ported and polished 305 TPI heads, Edelbrock Performer Intake, 14X3 Open Element w/ K&N, hiflow cats with two pipes going back, AC delete, SMOG delete, alu drive shaft, 3.73 posi, 170 stat w/ fan switch, MSD Igniton Coil, STB, Subframe connectors, KYB AGX, Eagle GSC, and poly bushings.
1982 Z-28
Blow Motor, this July 350 4 bolt, ZZ4 cam and heads and the rest to still be purchased.
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--Spyder--
1992 Camaro RS
LO3, T-56,centerforce clutch, ported and polished 305 TPI heads, Edelbrock Performer Intake, 14X3 Open Element w/ K&N, hiflow cats with two pipes going back, AC delete, SMOG delete, alu drive shaft, 3.73 posi, 170 stat w/ fan switch, MSD Igniton Coil, STB, Subframe connectors, KYB AGX, Eagle GSC, and poly bushings.
1982 Z-28
Blow Motor, this July 350 4 bolt, ZZ4 cam and heads and the rest to still be purchased.
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
You're in good shape. You could even put 1.6 ratio rockers on your heads with no problem.
The Target motor is another matter all together. The heads have press-in rocker studs, the springs are lift limited. Plus, it's a flat-tappet cam. The real killers are that it has dished pistons and the ports are restrictive. The best thing to do with a Target motor, if he wants some more performance out of it, is to replace the heads with some aftermarket performance heads, or the 'Vette aluminum heads (ZZ4) like you have. Even better to also replace the pistons with flat tops. The flat tappet isn't too big an issue, as good cams can still be had for fewer dollars than a roller, but with the Target heads, he's really not getting off to a good start.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 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/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, LT MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/95.5 @ 5800' Bandimere.
The Target motor is another matter all together. The heads have press-in rocker studs, the springs are lift limited. Plus, it's a flat-tappet cam. The real killers are that it has dished pistons and the ports are restrictive. The best thing to do with a Target motor, if he wants some more performance out of it, is to replace the heads with some aftermarket performance heads, or the 'Vette aluminum heads (ZZ4) like you have. Even better to also replace the pistons with flat tops. The flat tappet isn't too big an issue, as good cams can still be had for fewer dollars than a roller, but with the Target heads, he's really not getting off to a good start.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 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/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, LT MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/95.5 @ 5800' Bandimere.
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