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beaver and coyote already got to what I was thinking. for years automakers were using hot air tubes to help engine warm up. carbs of the 70s and 80s did not have good emissions when cold, so they had to find some way to start warming the carbs up. you guys could use a similar concept to get warm air on start up, that eventually opens back up to fresh air. depending on how creative you are, you could even have the system be able to switch from hot air/underhood air/cold air depending on intake temperature. that way the engine could be getting "ideal" air temp as much as possible.
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