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Old 11-04-2003, 07:55 PM   #1
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gas and heat

does running your heater increase or decrease the use of gas?
ya stupid question but its worth a shot


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Old 11-04-2003, 07:58 PM   #2
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they say running the air uses gas so i would say heat would too!
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Old 11-04-2003, 08:42 PM   #3
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It does not. Heat is free. It uses the coolant from the engine. All it is a smaller radiator that hot engine coolant is pumped through. That's why you have no heat until you get going a little.

For your AC to work, the engine has to drive a compressor to compress the gas. Running that compressor causes the engine to work a little harder, thus affecting your gas milleage.
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Old 11-04-2003, 09:08 PM   #4
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sounds good
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Old 11-04-2003, 09:17 PM   #5
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with all that heat in the engine bay, i would get real pissy if it took gas JUST TO MAKE MORE.
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Old 11-05-2003, 04:08 PM   #6
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Maybe

just thinking, it would seem true, that even the slighest engine temp drop might yield very minute HP gains, but nothing noticible.
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Old 11-06-2003, 04:42 AM   #7
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The hotter you can get an engine to run, the more efficient it runs. Now, this means that you have adequate internal materials to deal with the heat, fuel of sufficient octane not to preignite, and other factors beyond the scope of this thread. Dropping the inlet air temp will help and a greater gain can be realized by cooling the fuel.
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Old 11-06-2003, 07:50 AM   #8
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yup... oldschool is right. In fact in world war II aircraft, they ran at 265 degrees. The government wanted them to run at 300 degrees, but rolls royce said no because of the material they used couldn't handle it, or the oil. Inlet air charge temp makes the difference. In our cars, lowering the temperature will make the computer think the engine is cold and add more fuel to make it warm up... but that isn't a good thing. It won't run as good.
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