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Old 08-17-2002, 05:57 AM
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Post Hi Volume Water Pumps

Has any one have input on small block chev high volume water pumps? IE. Are they worth the extra cost ? Electric vs Mechanical?
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Old 08-17-2002, 09:23 AM
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No! most are junk ! stay with your stock pump if your are running on the street, you can change the speed and flow by changing to a smaller pump pulley.If you have a overheating problem check your fan and rad.
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Old 08-19-2002, 06:02 PM
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I have a Weiand aluminum water pump and didn't notice much a difference, certianly not what is advertised. They are lighter though and do look pretty trick. It wont save you from a bad cooling system.
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Old 08-20-2002, 08:25 AM
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The previous posts are absolutely correct. The aftermarket pumps look real cool, but they won't help at all if the overall cooling system is ailing. Make sure you have the largest radiator available for your car (maximum number of tube rows), along with a GOOD shroud and an efficient fan. Don't try to speed up the pump with small pulleys. You want the coolant to spend as much time in the radiator as possible, to get maximum heat exchange.
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Old 08-20-2002, 09:55 AM
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Engineguy is dead-on. It's not the amount of water you can push through the engine, it's the heat transfer through the radiator that counts. A lot of the high-volume pumps simply don't allow the water time to throw off the heat. (it's moving too fast) That's the reason some old flathead gurus drilled holes in the pump vanes and in some cases ground out every other vane.
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