Thread: Safe compression ratio?
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Old 09-30-2013, 10:39 PM   #7 (permalink)
IsaacCarlson
eco....something or other
 
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wood hauler - '91 Ford F-250
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14:1 seems to be the max for gas engines. 12:1 is the assumed safe limit.
10:1 is considered good.
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1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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