Was just wondering if one retards timing from 15* btdc to 4* does this increase cylinder head temps? I know exhaust gas temps go up but I think that's because of part of the combustion escaping the chamber due to lack of burn duration? Not necessarily because the engine is running hotter. I have a feeling that in fact lowering timing will have a cooling effect on the heads but the exhaust valves will take a beating. Any thoughts?
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