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Clutch fan for cummins big cam 350 install#
Electrical fans are a little harder to install because there is some wiring involved.They will not "overcool" the water in the radiator. Electrical fans will generally do a better job of controlling/maintaining engine temperature.Electric fans will only put an electrical load on the engine when they are running. Mechanical fans will put a mechanical load on your engine all the time.Mechanical fans will generally flow more air than electrics will.An unshrouded mechanical fan just churns the air in the engine compartment.Īfter these things are considered, look at the pluses and minuses of both types of fans. With the electric on an unshrouded rad, ONLY the area inside the fan diameter gets cooled. Makes no difference whether it is mechanical or electric. How is the radiator shrouded? An unshrouded fan is much less effective than a shrouded one.does it more closely resemble a brick wall or the intake side of a Boeing 747 engine? That'll tell you how much natural airflow you can expect, and that has a big influence on cooling. How well does the air flow into the radiator? Look at your grill.If you are a highway cruiser then you have a HUGE supply of air at the radiator already. If you are low speed and RPM but under load then electrics are the best way to go. How are you gonna use the vehicle? A highway cruiser and a rock crawler have WAY different cooling situations.So the same radiator that is "just right" for one probably undersize or oversize for the other.
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How big is the vehicle? A Suburban and a Jeep are gonna put a different load on the motor.By the same token if you have a radiator from a Peterbuilt then you don't need a fan at all. What size/style radiator do you have currently? If your stock radiator resembles a heater core out of a Yugo then it really won't matter what type of fan you have because you will always be perculating.What are you trying to cool? A bone-stock 4BT will take a lot less cooling than a heavy modified 6BT.That being said, it boils down (no pun intended) to these considerations: An asthmatic squirrel could have blown harder than that fan. That fan was just there as a checkbox item to say "Yes it has a fan". Most of us got our 4BT's out of P30 steps vans and the sorry excuse for and electric fan says a lot.