compression with Aussie Heads
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Joined: Mar 2002
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From: Phx, AZ
compression with Aussie Heads
does anybody know what the C/R would be on a 400 motor with stock piston's and flat top's i dont want to go to high because i can only get 91 octane here in Phx,AZ and i dont want my motor to run to hot. it already runs at 210*- 220*
THANKS
Paul
THANKS
Paul
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Joined: Jun 2002
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compression with Aussie Heads
I'd swear this question is asked every week. Unless you have physically measured everything, especially the combustion chamber of a 302C head, you are only guessing.
Don't rely on what other people tell you. Learn how to use one of several on line calculator like,
http://www.kb-silvolite.com/calc.phtml
Read the old posts. A stock 400 (not a 351M) will not benefit from a quench chamber because there is too much deck clearance. A guess would be 9.5:1 compression using the Aussie head with a dish piston. Pump gas that is 91 octane may not be enough to prevent detonation.
Don't rely on what other people tell you. Learn how to use one of several on line calculator like,
http://www.kb-silvolite.com/calc.phtml
Read the old posts. A stock 400 (not a 351M) will not benefit from a quench chamber because there is too much deck clearance. A guess would be 9.5:1 compression using the Aussie head with a dish piston. Pump gas that is 91 octane may not be enough to prevent detonation.
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