Helping fuel vaporizing....
The question is - does it have trouble doing it in the first place?
Fuel saving gadgets - a professional engineer's view
And
Fuel saving gadgets - a professional engineer's view
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In fact, any modern engine in good condition and at normal operating temperature emits only about 1 - 2% of the input fuel as unburnt hydrocarbons, even before passing through the catalyst.
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With respect to white exhaust in the morning (when not at normal operating temperature)....
That's water
Unburnt fuel coming out of your exhaust looks black and nasty. H20 is a natural by product of combustion (for what we burn). Warm and humid going mixing with cold - condensation. Not to mention the extra water that is leftover in your exhaust components after your car sits overnight
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But I've noticed even when my engine is hot, like near 210 if i'm driving in the city without the heater on, when I stop I still have white smoke coming from the exhaust.
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That's really weird - especially the part about the heater.... White smoke (smoke, not super fast disappearing cloud) is potentially burning coolant.... If you're worried about it - have your oil analyzed to see if there's coolant and what %.
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If I were to heat the fuel - it wouldn't be the tank... I'd do it inline with a heat exchanger
Do I think heating the fuel is beneficial? I don't have empirical evidence either way. Do I think gains are significant? Based on the information presented - not really. If it can be done cheap and reliably, I see no reason why not to tinker