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I was running my engine so hot, after big hill climbs, it would start to pink and the rubber top breather hose started to perish and crack...I never turned on the heater though as its the height of summer, and the radiator fan never cut in, so I guessed the heat was isolated to the combustion chamber.
Normally I just slowed a little and chose a lower gear at a higher rev on the hill to mitigate the pinking.
I have no temperature gauge fitted...
Its a non ECU carby ICE, so auto ignition retarding never happens.
After noticing the breaking down of breather hose, I redirected intake air away from 100% exhaust manifold to 100% ambient air, and no more hill climb pinking occured.
However, my FE has now dropped maybe 5-8%.
Superheated ICE economy testing does work, but you've got to question longevity.
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