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crog813
New User
| Posts: 2
| Joined: 10/03
Posted: 10/15/03
07:24 PM
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What is the highest reasonable compression ratio that what should have for street use on 91/92 octane? Thanks CC
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Posted: 10/15/03
07:31 PM
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Basically without getting to deep in an answer, iron heads 9.0-9.5:1 and aluminum heads 10-10.5:1 to be safe.
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bamacj
New User
| Posts: 5
| Joined: 10/03
Posted: 10/17/03
07:06 PM
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9.7 @ 72cc iron heads. cranking pressure showed 205lbs weakest cylinder,no problems on pump gas here.
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monker
New User
| Posts: 17
| Joined: 10/03
Posted: 10/20/03
12:38 PM
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I'm running 10.5:1 on 91 with camel hump iron heads. But it barelly squeeks by on the street. Not good for racing though.
Compression has alot to do with cam timing. I'm running a comp extreme 274 tappet cam in my 383.
You could always have the piston heads and the combustion chambers ceramic coated.
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