Author Topic: Compression test procedure (Read 725 times)

AWedel · « **on:** October 24, 2013, 07:45:19 pm »

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?

Buckeye513 · « **Reply #1 on:** October 24, 2013, 07:58:37 pm »

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.

Chuckie25 · « **Reply #2 on:** October 24, 2013, 08:09:24 pm »

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)