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Old 07-15-2002, 02:05 PM
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Post Stock-type water pump concern...

Cooling system is set up as follows. Front radiator is aluminum 2 core. Rear one is stock 4 core. The coolant is routed out of the engine, to the top of the rear radiator. Then from the bottom of the rear radiator to the top of the front one. Finally from the bottom of the front radiator to the bottom of the block. This whole system filled takes about 7 gallons of coolant.

When we are on the track, with other trucks, the system gets a little warm, maybe climbing up towards 240. On our test track at home (where we don't push it so hard and prolly don't get the RPMs up quite as high), we have no issues with cooling. Stays right in the 180 - 195 range.

The rear radiator sits quite a bit higher than the rest of the cooling system. I'm curious about the design of a stock water pump. At high RPM, can it have trouble moving water that high? Is it starting to cavitate at those high speeds and not pump water? Anyone have any ideas on this???

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Old 07-16-2002, 10:28 PM
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Under driving the pump can help (larger pulley). Without more info on your vehicle particulars it is hard to help.
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Old 07-25-2002, 04:35 PM
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Ok, the truck is an early Ford Bronco, with a 351W (not legal in it's class, soon to have a new 302 in it). Approximate HP on current engine is about 400, and we run it up to about 6,000 RPM. Pulley setup is stock. What other particulars might you be looking for, AND... is that really the tailpipe on your car in that picture???


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Old 07-25-2002, 06:09 PM
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Try getting a 6$ cavitation plate that rivits to the stock impeller,cheap and it works!
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