do adding heads help HP?
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Joined: Aug 2008
Posts: 79
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From: camp lejeune NC
Car: 2000 TRANS AM
Engine: H,C,I LS1
Transmission: T56
Axle/Gears: 3.42 posi
do adding heads help HP?
hi. my freinds got a 1991 camaro rs with a 305 carbed motor. he was wondering if adding 2.02 by 1.60 with 67cc chamber heads would help at all?
thanks
thanks
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: do adding heads help HP?
Depends which heads they are. 2.02 valves are generally too big for a 305.
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From: NE Ohio
Car: 82 Z28
Engine: TT LS
Transmission: 4L80E
Axle/Gears: S60 3.54's
Re: do adding heads help HP?
I'm thinking that will probably hurt performance or not do much for it. First off with those size valves you can only go up to .450" lift and the valves are shrouded anyways. They might flow more air to make more power, but I believe 305 heads use a 58cc combustion chamber so it will be losing a large bit of compression.
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Joined: Feb 2008
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From: Summerland, B.C
Car: 1982 Trans am
Engine: 383
Transmission: AGE M22Z
Axle/Gears: Moser 9" 3.70 detroit locker
Re: do adding heads help HP?
I heard you can't use 2.02 heads on a 305, something about the valves hitting the cylinder walls?
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Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: do adding heads help HP?
2.02 valves on a 350 are fine, but again it depends what heads they are to know if they're worth it.
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