Sportsman II 72cc heads
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Joined: Aug 1999
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From: Northern NJ
Car: 89 Formula / 09 G8
Engine: LS1 / LS3
Transmission: M6 / M6
Axle/Gears: 3:42 / 3:27
Sportsman II 72cc heads
I am unsure if i should buy the 64cc or the 72cc heads. The pistons will be stock 4 valve relief. The stock L98 are 64cc i think that will give me a 9.4 CR correct? If i went with the 72cc the CR would drop down to 8 CR or so right? This engine will be NA. I want to run pump gas.
Joined: Oct 2000
Posts: 2,112
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From: Orange County,NY
Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
Go with the 64cc heads.At 9:4.1 you will still be able to run pump fuel.The 72cc heads would drop your CR and kill some power,and being as you are running NA all the compression you can keep will help.
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1982 Z28:355,4 Speed,Lots of bolt ons
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1982 Z28:355,4 Speed,Lots of bolt ons
Thread Starter
Supreme Member
iTrader: (1)
Joined: Aug 1999
Posts: 1,387
Likes: 0
From: Northern NJ
Car: 89 Formula / 09 G8
Engine: LS1 / LS3
Transmission: M6 / M6
Axle/Gears: 3:42 / 3:27
Thats what i thought it would be. Looks like the heads will be a pass. If anyone is interested there are a set of 72cc's on ebay for $260.
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