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Old 12-11-2012, 07:21 PM
OMARS67 OMARS67 is offline
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do cast iron heads gain compression because of heat??? i was told to keep the compression 9:1 were aluminum i can go to 10:1 i understand the heat issue with iron vs aluminum. i just wanna know if the motor is 9:1 will i gain compression when the car reaches operating temp. or is it just that 10:1 will start to detonate because of 91 octane
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