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Old 06-04-15, 08:55PM   #1
JSPONT
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Default Old design new design Flowkooler

Why did they change it?

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Old 06-04-15, 11:59PM   #2
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Maybe they came up with a way to make it cheaper
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Old 06-07-15, 02:48AM   #3
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Different vane design on the impeller.
The old one looks like a plate is welded(?) on to the impeller(fewer vanes) in order to close it to increase efficency.But that is a time consuming production process.

The new one has more vanes on it (more efficient if not just good as the closed one?). If you put the pump backing plate up against the new pump impeller the clearance should be very close. That clearance if set up correctly is what makes a Pontiac water pump efficient.Not a lot of liquid getting missed by the vanes.

An old racer trick was to remove every other vane to reduce water pump hp loss.
OK for the drags. No good for the street.
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Old 06-07-15, 11:17AM   #4
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Any real world proof to any of these pumps
Has any one built a water pump dyno to test how much water they can move and at what pressure.
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Old 06-07-15, 11:55AM   #5
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I can not tell if the new pump worked better because I did a few things at once to get the car to run cooler. I had already clearenced the plate to the old pump, the new pump was a tad closer to the already clearenced plate.
As for horsepower I don't know, its a street car I feel safer with a mechanical pump rather than electric. I can afford a few horsepower. LOL
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Old 06-07-15, 02:21PM   #6
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FlowKooler "should" advertise those specs.
Do they?
I dunno.
Sure would be nice to know though.

Everything stays the same on the test mule except the pumps.
measured temps in and out
measured GPMs
Difference in HP at same given rpms.

Same day conditions for all tests.

Most magazines are not gonna pit competitors products against each other because they are all paying to advertise their stuff there.
In the 1980s CarCraft or Hotrod got in hot water with their advertisers when they did a muffler manufacturer's dyno shootout and published the results for all to see.
They did one more for Roots style superchargers.
Don Hampton blew everyone else away.
End of dyno shoot outs of competing products.LOL
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Old 06-07-15, 07:24PM   #7
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Let the AZ weather in August be the test bed....lol
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Old 06-07-15, 11:56PM   #8
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That or Death Valley ,California. LOL
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Old 06-08-15, 11:49AM   #9
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Quote:
Originally Posted by sprint250 View Post
That or Death Valley ,California. LOL
Funny you mention that
My friend has to go there for work next week. He will be there for 2 weeks.....lol
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Old 06-09-15, 01:38AM   #10
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Driven through there and camped in the Mojave in winter but never had the pleasure of working there in the summer .......thank God.

Summer monsoon is upon us. Could get lively this year in the mountains and deserts.
Nothern AZ/Grand Canyon/Williams/Flagstaff etc. probably will see a lot of rain this summer.
9:30pm here- 75 degrees, 60% humidity,Baro @28.7 & falling. Indicator at the ponderosa here says 30% chance of rain. Looks like it too.
You may be seeing/feeling some of this by tomorrow.
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Old 06-16-15, 11:57PM   #11
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I got a 5 inch pulley on my pump. They are out there.
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Old 06-17-15, 08:05PM   #12
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I tried to grab pulleys out of the pick and pull junk yards when they still had a few 70's and 80's cars. Not many of those cars these days mostly 90's cars now. There was one other yard that had piles of pulleys and fans. That one doesn't exist anymore.
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