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Discussion Topic:
"modern" water pumps
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jehn |
08-18-2015 @ 8:32 AM
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New Member
Posts: 101
Joined: Nov 2012
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Any body out there who has used "modern" water pumps from MAC`s? Do they have twisted impeller blades and good quality?
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RAK402 |
08-18-2015 @ 11:03 AM
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Posts: 436
Joined: Jul 2015
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I just installed a pair in my 40. I have only run it up in the driveway and driven it around the block twice, so I don't know how they will be in terms of keeping the engine cool. The fit and finish seem nice and consistent with that of the pumps that were on the car (originals that had probably been rebuilt a million times). I was able to run it for about a half an hour in the driveway (at idle) without it overheating, which is a first for my car). I will report back when I really start driving it around in the hot weather.
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jehn |
08-19-2015 @ 12:56 PM
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New Member
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Let tell us later about your pumps. I did a good deal today with a pump set from Bob Drake. I hope they will be good with their twisted impeller blades.
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Old Henry |
08-19-2015 @ 5:18 PM
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I'm not sure what you mean by "twisted" impeller blades. If you mean as I've drawn in attached, those are the modern style same as I got from C&G and work fine after 65,000 miles of driving for me.
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Old Henry |
08-19-2015 @ 5:35 PM
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Another picture.
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jehn |
08-20-2015 @ 8:34 AM
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New Member
Posts: 101
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I mean if MAC`s pumps have twisted impeller blades like Bob Drake´s pumps. You can see what I mean in Bobs catalog or website. Twisted impeller blades make a better water flow than the stock straight blades.
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TomO |
08-20-2015 @ 9:47 AM
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Did you try asking Mac's? Dennis Carpenter and Bob Drake both describe all features of the pumps that they are selling.
Tom
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Old Henry |
08-20-2015 @ 11:22 AM
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Senior
Posts: 738
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I see what you mean. Drake's impeller is definitely different than what I got from C&G. (Screen Shot of Drake's attached.) Although I don't know, I would expect Mac's to be like C&G's, not Drake's. As TomO said, you might learn something by calling Mac's. And, then again, maybe not.
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jehn |
08-24-2015 @ 12:21 AM
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New Member
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Thank you guys, I think I have got the answer about the twisted impellers. Those impellers seems to bee just on the pumps from Bob Drake.
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TomO |
08-24-2015 @ 7:53 AM
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Posts: 7250
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The pumps that I received from Dennis Carpenter have the same impeller design as Drake's. The impellers on Speedway Motors pumps appear to be different in their ad. I don't know how much effect the impeller design has on overheating. I went to Speedway's pumps in the 1990s and saw no change in my overheating problem, then I tried Skips pumps with the same result. I used a mild acid solution to clean my block and had the radiator cleaned again, to solve my problem of overheating while idling. I am putting on Carpenter's pumps when I change my anti-freeze this fall, because Skips pumps are throwing oil all over my engine compartment.
Tom
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