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Post by RAM Z on Nov 12, 2009 16:56:24 GMT -5
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Post by mongoose on Nov 26, 2009 8:06:04 GMT -5
Ok... lets talk about why 442's would have a vacuum operated flow control valve on a heater only car (we know why it's done on an A/C car).
I'm guessing it would have something to do with heavy duty cooling (engine coolant) that a performance engine probably needs. And if that's the case, how would limiting coolant flow through the heater core "circuit" improve engine cooling? Is it because the return line from the heater core goes to the water pump, allowing this coolant to by-pass the radiator?
I have no idea what percentage of coolant flow goes through the heater core, but perhaps the engineers felt that that amount of coolant by-passing the radiator was too much in a system that was marginal at keeping the engine cool.
So, should I consider including a heater control valve in my system to go along with the new aluminum radiator and 2,800cfm cooling fans? Or just stick with the pipe thread nipple? Obviously the control valve needs a vacuum source to open/close it, which I already have since my car is an A/C car that I'm converting to a heater only car.
BTW, as a side-thought... I assume the purpose of the t-stat by-pass hose is to allow there to still be coolant circulation through the engine while the t-stat is closed?
p.s. after I posted, I saw that the thread had continued to a second page... which discussed the lack of a vacuum line on the heater only systems. Odd, but interesting. Seems half-a$$ed.
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