Originally posted by mcovello@Sep 11 2005, 08:05 PM
Initially I thought my problem was a fuel issue - I thought we were getting an intermittent lean condition. The engine would run fine for 2-3 hrs and then just explode. What i finally realized was that the crank angle sensor (distributor) would heat soak to the point of failure and then the ignition timing would become erratic. All i did was to make some heat shielding to protect the CAS from the header heat and the engine has been bulletproof ever since.
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That's an awesome point, and one i hadn't thought of. We had some problems with odd timing irregularities blowing up our engines (two engines in two different cars, one long weekend ). We haven't (i'm knocking on something right now) had that problem in my car, but i've got heat coated headers. And the problem seems much worse on hot days, and under heat soak. I appreciate the observation and will take that into our prep list.