Thread: Racing gas in Roush motors
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Old 08-24-2009, 10:35 PM
csx4910 csx4910 is offline
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Cobra Make, Engine: Black CSX 4910, Roush 511 8 stack
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I believe my compression ratio is 10.25:1. (Sandy, or anyone else with the same motor can confirm.) All I know is it runs like crap on 91 compared to even the 100 octane. It is unleaded 100 octane so it sounds like I am relatively safe running that or a combination of the 2 together. Thanks for the info everyone
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