need help - what heads should i go with?
11-06-2003, 04:47 PM
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Car: 1986/88 Frankenstein Trans Am
Engine: carbed L98
Transmission: T-5
need help - what heads should i go with?
im looking for a decent pair of heads for around $500. nothing crazy, nothing too mild. preferrably with as little required valvetrain upgrades too...id like to get a new roller cam that matches the new heads to suppliment the new chambers and get some more power out of the upgrade. and maybe a little muscle car sounding exhaust 
.
right now i have a carbed L98, everything is stock. what do you guys suggest?
.right now i have a carbed L98, everything is stock. what do you guys suggest?
11-06-2003, 06:11 PM
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Car: '82 Z28
Engine: 350HO
Transmission: M4
GM L31 Vortec's. $519 + a matcing intake manifold $150.
or you could go for the Vortec's with upgraded vavle springs, and the proper machining for higher lift cams (up to .550) $739
either will make a proven 40 more horsepower.
since you already run a carburator, it should be pretty straight foreward.
or you could go for the Vortec's with upgraded vavle springs, and the proper machining for higher lift cams (up to .550) $739
either will make a proven 40 more horsepower.
since you already run a carburator, it should be pretty straight foreward.
11-06-2003, 06:52 PM
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Car: 1986/88 Frankenstein Trans Am
Engine: carbed L98
Transmission: T-5
40fwhp or 40rwhp?
and do i need to upgrade any of the valvetrain? or should i upgrade anything? what cam shafts go good with those heads?
and do i need to upgrade any of the valvetrain? or should i upgrade anything? what cam shafts go good with those heads?
11-06-2003, 07:00 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Re: need help - what heads should i go with?
Originally posted by Trans_AM_88
... and maybe a little muscle car sounding exhaust
... and maybe a little muscle car sounding exhaust
11-06-2003, 07:08 PM
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Car: 1986/88 Frankenstein Trans Am
Engine: carbed L98
Transmission: T-5
Re: Re: need help - what heads should i go with?
Originally posted by five7kid
Uhhh, what do you have for exhaust now???
Uhhh, what do you have for exhaust now???
)...but i have stock headers, cat and hooker cat back. im getting hedman headers and y pipe though, and no cat.
11-06-2003, 07:11 PM
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Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
I had the original heads (083s) redone for $400.
That included milling off .005", new larger (2.02 and 1.6) valves, screw in studs, guide plates, large dia dual springs, bowl hogged and ported, and necessary machining for a .575 lift cam (using 1.6 rockers).
IMHO, the 083 heads have some real potential.
That included milling off .005", new larger (2.02 and 1.6) valves, screw in studs, guide plates, large dia dual springs, bowl hogged and ported, and necessary machining for a .575 lift cam (using 1.6 rockers).
IMHO, the 083 heads have some real potential.
11-06-2003, 07:15 PM
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Car: 1986/88 Frankenstein Trans Am
Engine: carbed L98
Transmission: T-5
Originally posted by ZZ28ZZ
I had the original heads (083s) redone for $400.
That included milling off .005", new larger (2.02 and 1.6) valves, screw in studs, guide plates, large dia dual springs, bowl hogged and ported, and necessary machining for a .575 lift cam (using 1.6 rockers).
IMHO, the 083 heads have some real potential.
I had the original heads (083s) redone for $400.
That included milling off .005", new larger (2.02 and 1.6) valves, screw in studs, guide plates, large dia dual springs, bowl hogged and ported, and necessary machining for a .575 lift cam (using 1.6 rockers).
IMHO, the 083 heads have some real potential.
Last edited by Trans_AM_88; 11-06-2003 at 07:18 PM.
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11-07-2003, 02:08 PM
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Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
Wish I had some flow-bench data, but I don't. My 1/4 mile times would not help much either since I did all my mods at the same time.
There's a couple of guys on this site that have documented their results working with stock heads. You'll have to do a search.
There's a couple of guys on this site that have documented their results working with stock heads. You'll have to do a search.
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