palanchou Posted September 9, 2011 Share Posted September 9, 2011 hi,having had a rebore, newpiston and rings, i have pressure tested the crank case, ok. new gaskets all round. tested every gasket and joint with soapy bubbles, compression test still struggles to make 100 psi. any new ideas please?thanks once again bill johnson. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 9, 2011 Moderator Share Posted September 9, 2011 does it reach 100psi then? thats not bad in my book for a cold engine Link to comment Share on other sites More sharing options...
Tuesday Posted September 9, 2011 Share Posted September 9, 2011 Another thought. If the exhaust port has been raised by a previous modder, this will drop the compression ratio. Link to comment Share on other sites More sharing options...
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