Compression test procedure

• Compression test procedure
  Posted by AWedel on 24 Oct, 2013 19:45
• What's the procedure for compression testing--# kicks, when to read, etc?  I'm starting with a garden variety NAPA tester (gage, hose, adapter).  Also, what minimum allowable pressure for an 86 250 and a 87 500?
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• #1 Reply
  Posted by Buckeye513 on 24 Oct, 2013 19:58
• I did 8 kicks no throttle and 8 kicks WOT. Took the average of the two numbers. My fresh top end with a 87.5 mm bore in my 500 was around 175-180 psi.
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• #2 Reply
  Posted by Chuckie25 on 24 Oct, 2013 20:09
• i only do 8 kicks WOT and do it a couple times. my 87 250 on the final bore pushed 170psi before it was ever ran,, then 180/185psi a couple weeks ago (after a year and a half of beating on it)
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• #3 Reply
  Posted by Q2W on 25 Oct, 2013 07:34
• kick it like it owes you money.   
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• #4 Reply
  Posted by QuadMan8 on 25 Oct, 2013 07:52
• Does it matter if the motor is cold, or warmed up.
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• #5 Reply
  Posted by Buckeye513 on 25 Oct, 2013 09:09
• Cold.
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