Yes, the flow of coolant thru the radiator is related to the speed of the
water pump...the reason they make the alternator turn faster on newer cars is
to keep up with all the electrical demands, like radios, A/C, fog lights, etc
you find on new cars. On older vehicles, this doesn't matter as much. if
you've ever taken the cap off after while the vehicle is running, and the
thermostat is open, you'll see the coolant really flowing fast. Although the
newer radiators flow side to side, older radiators flow straight down, so if
the coolant is moving faster, it also is moving top to bottom, which doesn't
allow much time to surrender heat, if you're running an original style
radiator. that's why usiing bigger pulley's may help older trucks, while not
helping much with modified trucks which are using more modern radiators,
possibly. At least, my understanding of the radiators is that the older ones
flowed down, while newer ones flow side to side, allowing more time to
transfer heat. Any comments on that, anyone?
Jerry Casper
heat wave in Virginia, it's been boiling a few times. :)
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