Quote:
Originally Posted by Bob Mulry
What was your EGT on that pull????
Stretching the valve or sinking the seat??????
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If the valve was stretching due to getting really hot , I agree this could be a cause . This engine runs at WOT on the dyno for a very short time . A test is a sweep test lasts only about 10 seconds at WOT . So I have a hard time thinking that these valves get hot enough to stretch . Anything is possible . Don't have EGT's running , but the O2 sensors are saying the A/F ratio is around 12.8 .