COMPRESSION

Old 12-03-2008, 03:41 AM
  #1  
JEFF69Z28
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Default COMPRESSION

I HAVE A 406 CID SBC CHEVY WITH FLAT TOP PISTONS.IM GOING TO INSTALL A NEW SET OF AFR 210 ELIMINATOR 65 CC HEADS.AFR HAD COMP CAMS GRIND ME A CAM WITH 260/264 DURATION @ 50,678 INTAKE/688 EXHAUST HOW MUCH COMPRESSION SHOULD I USE WITH THIS SETUP,AFR FIGURED I WOULD HAVE ABOUT 11:25/11:75 WITH THERE HEADS :?:
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Old 12-03-2008, 04:53 AM
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zerotolerance
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there calculations are very close. without knowing some other factors like piston heigth head gasket thickness your piston cc i guessed at some of your specs and came up with 11.1:1. just some more food for thought i would be sure to run alittle race fuel in this setup to be safe for detination. you should only have to mix it 70/30 pump to race. if your gona run it hard.
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Old 12-03-2008, 07:45 AM
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JEFF69Z28
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IM JUST GOING TO RACE THE CAR SO I WILL USE 104 TORCO RACE FUEL FOR THE MOTOR OR SHOULD I USE A HIGHER OCTANE.TO GET COMPRESSION UP SHOULD USE DOMED PISTONS OR MILL THE HEAD?
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Old 12-03-2008, 01:24 PM
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zerotolerance
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well that all depends on your budget pistons would be your best choice. milling the heads cheeper but why destroy a brand new set of afr heads. this all depends on what compression your goal is. keep it 10.5-11:1 its cheep on the pocket run pump fuel with alittle race fuel. the best thing you could do is call quick fuel and get yourself the e85 kit from them you will pick up more hp and tq over race fuel and cost you 1.5 gallon the kits runs just under 300 for a 4150 carb.
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