Quote:
Originally Posted by patbob
That particular one? No, but something similar.
As for the hot air intake theory, someone on this forum actually measured underhood temps and concluded that the air only gets hot under there when completely stopped, otherwise it was nearly ambient.
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That was me. I disconnected that wrinkled tubing that goes to the cold are inlet (I have a Federal car not the CA one with the big air filter housing) and taped the temperature probe on the air horn of the air filter and took a car for a drive on the freeway and in city traffic several times.
While the car is moving the temp will drop to near ambient temp; however when you stop and idle for along time the temp goes up; I do not remember if it went up to 111 degrees F or 121 degrees F while at idle.
I was surprised that the temp went down so much while the car is moving. I guess there is enough turbulence from under the car when moving that the cooler outside air gets up under the hood.
What I concluded is that if you have an under the hood air filter while your car is moving you will not be pulling in a lot of hot air.
You will pull in hot air at idle but I do not think that creates any problem.
I used a digital oven thermometer with a 4 foot wire probe connected to it (made for sticking inside of meat to see if it is cooked to temp). The thermometer part has magnets on the back to stick to the oven door/hood.