Quote: Missing thermostats can and will cause smoking in the long run indirectly but still- engine does not get up to temp, and you get excessive bore wear - pistons slapping around, rings not sealing properly.
Getting an engine to its correct operating temperature is critical in all cars, but since EFI compensate for temperature and so on in THEORY it should bother these cars less - but they will still wear out quicker - in a carburetor setup EVERYTHING must be spot on since it cant compensate a few degrees either way in richness nearly as quickly or accurately as a EFI engine
In the real world, this isn't going to happen. Using that logic, all marine motors will smoke and wear out because they never reach any temperature that's warmer than the lake water.
There is no correlation between coolant temp and ring/bore wear. Coolant does not expand or contract the bores any more than a few tenths of a thousandth at the extremes of cold vs. operating. Running an engine before it reaches operating temp only happens from a cold start, and the actual pistons and rings aren't up to temp yet on a cold start... That's where wear comes from (cold pistons and rings on a cold start), not because of the coolant temp.
I would like for you to explain technically why/how you think running low coolant temp will guarantee bore wear..
I have seen two ford NMCA hot street engines on the dyno this year, and they were in the upper 800hp range. The coolant temp on those engines was less than 100 degrees at the end of a 1/4 mile pass, and after a whole season there was No wear on the bores at all. I've also seen a 900hp C5R engine on the dyno that never even got to 90 degrees coolant temp after a 1/4 mile pass. Those engines are started up dead cold and ran full throttle without even "warming up", and there is no wear even with the little .043" low tension rings they use.
I repeat, low coolant temp as an isolated variable will not cause an engine to wear out and smoke, but pistons and rings that aren't up to operating temp yet will...
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