Reply With Quoteblacktop or silvertop. completely stock? silvertops have 10.5:1 blacktops have 11:1
Compression On A 20V
What compresion should i expect to get on a 20v 4age?
blacktop or silvertop. completely stock? silvertops have 10.5:1 blacktops have 11:1
LOL yeh i know that. sorry I shoulda been more clear what reading should I get on the Comp test
i got in the 220's from memory
shouldnt be a HUGE deal just so long as they are all within a couple of points
RIP Carly - a smile to light the world.
06/07/2011
180psi-200psi is very good and under is shit mine is 160psi so im just doing a crazy bulid
sorr probably should have read it better, no idea about 20v comp readings
Compression numbers shouldn't be a good way of judging whether a motor is healthy or not unless it's completely standard. Going to more aggressive camshafts will affect the compression readings.
As long as the numbers are all within 5% (?) of each other, it should be fine.
Edit: Starter motor speed will also effect results.
Last edited by adam; 14th July 2009 at 02:13 AM.
cant rely on compression test numbers. using one tester i got 225psi across all four and using another i got 165psi. it gave roughly the same compression through all four but unless your using multiple testers and finding the average you cant rely on the test numbers much.
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