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Mark #2
01-11-2005, 09:17 AM
"The broken rings are definitely a sign of detonation. My wastegate failed on my 87 930 and the boost ran up to 1.2 before I noticed the problem. I had broken rings on 3 of the 6 cylinders. The max boost you can go is 0.9 bar the ignition is 24 degree at 4000 rpm." With a stock intercooler the engine cannot handle 1 bar and 8:1 CR."

FYI 1.2 bar is 17.4 psi(boost)

cpeapea
01-11-2005, 08:40 PM
good for comparisons. however sometimes motors can act differently, our could be that + or -.

interestingly enough, f-1 racecar motors turn rediculously high rpms to help "outrun" detonation knana

dboat
01-12-2005, 07:02 PM
good for comparisons. however sometimes motors can act differently, our could be that + or -.

interestingly enough, f-1 racecar motors turn rediculously high rpms to help "outrun" detonation knana

got to love those F1 cars that turn up to 19,000 rpm... :nana2