Compression does not change with speed (RPM).
It does change with engine heat when things expand.
Quote:
Originally Posted by Bass_Appeal
Gerry I think I might have found the answer to my questions and wanted to let you know , just in case . I tested it without the throttle being advanced to wot while cranking the engine , goring to try to open throttle when I crank and see if my psi goes up . The specs should be in the nineties , but I'm only in the seventies . I'll let u know for your own info and knowledge. Thanks
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