tested compression in the s1 sat got same reading in all pots of 140 ..want to know what is the correct compression????i know if there all the same or within 10% of each other there ok ...car is standard apart from kn panel magnex running 8 psi of boost..140 seems a bit low compared to other posts on pf site .thanks to all in advance of replies

 

When I owned a Series 1 the compression test's that I did came out at 150psi each. As long as they're all within 10% you should be ok

 

cheers m8