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What I did for mine was to take a dremel with a sanding wheel on it, belt removed and move side to side on the contact surface of the pulley and got rid of the mirror smooth finish. I was having a terrible time of overheating for years with my truck due to the fact that the radiator fan was locking up and generating more drag than the pulley could keep up with. Basically the water pump would stop turning when I needed it the most such as pulling the trailer up a mountain pass on a hot day. The radiator fan would come on with a roar and then it would gradually fade out to silence and the temperature would rise up to the red zone. Only way I could make it to the top of the pass without boiling over was to slow WAY down, shift down to 3rd gear and 1/4 throttle it up the hill with the AC turned off.
Full story here, two different threads if you are interested. https://www.ford-trucks.com/forums/1...uty-7-3-a.html https://www.ford-trucks.com/forums/1...superduty.html
Anyway, here is the picture of both pulleys and the one on the bottom is how you want your pulley to end up looking like. The upper one is a Superduty pulley like we all have from the factory, and the one of the bottom is off of an OBS 1993-1997 diesel.
Upon installation of the pulley, all the glazing that was on the belt disappeared, all the squeaking died out and I haven't had yet a chance to really test it out, but I'm confident that all my overheating problems are cured with this setup. The OBS pulley is larger in diameter and therefore has greater mechanical advantage to actually put power to the water pump/radiator fan assembly and keep the cooling system working even under heavy load.
How much percentage wise do you think the water pump slowed down with the larger pulley?
How much percentage wise do you think the water pump slowed down with the larger pulley?
I don't know. Not good enough at engineering math to be able to figure it out. What I do know is my truck has 4.88 rear axle, so the engine is turning faster than most other trucks and the slight drop in rpm for the water pump shouldn't be an issue.
I don't know. Not good enough at engineering math to be able to figure it out. What I do know is my truck has 4.88 rear axle, so the engine is turning faster than most other trucks and the slight drop in rpm for the water pump shouldn't be an issue.
(Difference in diameter of pulleys/diameter of original pulley)*100.
dude I am dying over here and I need to go to sleep so I can work tomorrow ha ha ha.
btw the fact that you have that knowledge is actually pretty cool i took all alg1,and 2 as well as trig but that was back in 84/85 and it obviously did not soak in that well.
