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Author Topic: Low compresion Super9s  (Read 1545 times)

yogi

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Low compresion Super9s
« on: September 21, 2009, 06:48:36 PM »
Hi guys just wondering what the compression should be on the Aircooled super 9, Ive carried out a compresion test and it's only reading about 80 psi at WOT spun over about 10 times......Any help appreciated  :)
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OldGuy

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Re: Low compresion Super9s
« Reply #1 on: September 21, 2009, 11:44:12 PM »
To take an accurate compression test the motor needs to be fully warm and the throttle fully open. Cold and/or the throttle closed will cause low readings.
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OldGuy
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zombie

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Re: Low compresion Super9s
« Reply #2 on: September 23, 2009, 12:06:38 AM »
Should be right at 100. You may want to put in a set of rings. You can take the glaze off the cylinder w/ 600 grit emory paper, and a good oil. ONLY CUT in a circular motion around the inside. Never from top to bottom
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yogi

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Re: Low compresion Super9s
« Reply #3 on: September 23, 2009, 06:06:10 PM »
Thanks for the replys guys, i'll check it again tomorow when it's warm .
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