Heads on a 305?
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Junior Member
Joined: Apr 2008
Posts: 25
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From: Arizona
Car: 91 CamaroRS convertible
Engine: 305 TBI
Transmission: 700r4
Axle/Gears: stock
Heads on a 305?
I have a 91 camaro with a Lo3. Is it possible to put heads with 2.02/1.60 valves on it or will they hit the cylinder walls? Any info would be appreciated.
sean
sean
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
They won't hit the cylinder wall until very high lift, but they won't be of any performance benefit.
Junior Member
Joined: Jan 2008
Posts: 18
Likes: 0
From: Fayettehell, NC
Car: 1991 Pontiac Trans Am GTA
Engine: 305 TPI
Transmission: 700 R4 slushbox
Axle/Gears: 2.73 Posi
Re: Heads on a 305?
Define high lift for me; what kinda numbers you talking, and how much does head gasket selection affect the choice? And does it actually hit the cylinder block, or is it more safety for stock pistons?
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
Something in the .60" lift range. Head gaskets would only make a difference in the .025" or so with a thicker gasket giving you that much more before hitting the top of the block.
You could machine eyebrows in the block if you really wanted to go beyond that lift. They did it with BBC's.
You could machine eyebrows in the block if you really wanted to go beyond that lift. They did it with BBC's.
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