Ok, just tested the compression cold, wide open throttle, cold engine, elevation 5200ft asl. The result was 103 psi.I get the noise, which is most similar to the noise in the GussGuss video, when hot or cold, low RPM pulling a hill. The noise is reduced when opening throttle and increasing RPM. I will try to get a video or sound recording.
what does this sound like?https://www.youtube.com/watch?v=CH5xpwVNiIk i installed a 535 kit W/8.5:1 piston. no spacer plate. i thought it was a clearance issue but now not sure. don't mean to hijack but this may help mrunderhill or others.
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