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04-19-2019, 10:20 AM | #21 |
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Re: Flathead water pumps
I stopped to see skip Weds. He had a brand new set of after market pumps
he was rebuilding. He said customer said he had no cooling improvement so he sent them to Skip to modify. Maybe this person will read this post and after he uses the new pumps report the results here. G.M.
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04-19-2019, 02:54 PM | #22 |
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Re: Flathead water pumps
I would liket to run a set of skips pumps on the race engine. However I'm using 8BA Ford pumps and don't have any cores. I went on line and found a set od 53 PU pumps for $112, so I bought them. I work on a limited budget. I just figgered if they didn't work I'd at least have cores for skip. When the box arrived I was supprised to find Dennis Carpenter pumps in the box. I was also supprised to see the new impellers on them. My biggest concern is the thickness of the input hole. It's only about 1/8" thick and I'm afraid they might break there with the engine shaking. Anyways, I have many other problems to solve befor I need them
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04-20-2019, 11:41 AM | #23 |
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Re: Flathead water pumps
MTT
can't believe 1200 people read this and only 2 responded |
04-20-2019, 12:31 PM | #24 | |
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Re: Flathead water pumps
Quote:
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04-20-2019, 12:59 PM | #25 |
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Re: Flathead water pumps
When I rebuilt the 59AB in my '47, I put Bob Drake pumps in ($125 for the pair), and then sent the originals to Skip for rebuild. Got Skip's back and have them in "reserve" for when or if the Drake pumps fail. Been two years and so far, so good. The shaft in the left one seems a little bent, but otherwise all good. Looks from Bob's video on his pumps as though he built to his own specs. Wonder where the manufacturing takes place....see they are currently out of stock!
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04-20-2019, 01:22 PM | #26 |
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Re: Flathead water pumps
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04-21-2019, 05:09 AM | #27 |
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Re: Flathead water pumps
I purchased pumps from Speedway recently, but it will be a while before I run the engine. Pumps look good out of the box, but the flimsy thin cardboard box they came in was trashed when I picked them up. Luckily I had ordered multiple parts, so they were in a larger shipping box.
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04-21-2019, 09:57 AM | #28 |
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Re: Flathead water pumps
Are higher flow pumps better? If so, why for years did people knock off every other fin to keep water in the radiator longer. If higher flow is better, why do we run thermostats? Can't have it both ways.
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04-21-2019, 02:20 PM | #29 | |
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Re: Flathead water pumps
Quote:
Phil, There are a lot of guesspert fumble fingers out there. People were just trying anything to get the temp down. I did all the tests for Skip and designed his new impellers and can assure you more coolant through the engine produces cooler results. In fact his pumps nearly double the flow of stock and after market pumps. Thermostats don't really slow the coolant they open and close to try to maintain the say 180 degree rating of the stat. Being partially open they would slow it some. With stock and after market impellers you get a lot of slippage of the impeller in the coolant, this stirs a lot of air into the coolant. Coolant doesn't cool as well going through the radiator with air in it as pure coolant does. On Skips water pump machine after running stock or after market pumps there is a big release of air when he removes the cap. There is no air with his pumps. Lets hear from people that use Skips pumps after the stock ones and people that used after market pumps then had him modify them. G.M. I want to add, with a plugged up radiator the engine will run hot even with Skips pumps.
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04-21-2019, 08:33 PM | #30 |
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Re: Flathead water pumps
It would be nice to see actual test results comparing stock pumps to Skip's. Not just flow rates but temperature comparisons under load and at idle and everywhere in between. That probably require dyno testing not just flow rates. It's obvious that an improved impeller would increase flow rates but not so obvious that temperatures would fall given the same radiator and thermostats.
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04-21-2019, 08:35 PM | #31 |
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Re: Flathead water pumps
Just to be clear, as I understand it, the later (8BA) pumps have efficient impellers and are quite adequate as is, so there is no benefit from an "improved" design. The earlier pumps ('32-'36) have inefficiently designed impellers that can benefit from a better design. Can someone clarify this for me?
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04-21-2019, 08:55 PM | #32 | |
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Re: Flathead water pumps
Quote:
to 36 pumps and impellers are completely different from the 59A and 8BA pumps. G.M.
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04-21-2019, 11:15 PM | #33 |
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Re: Flathead water pumps
I think the jury is still out as to whether improved flow equals a cooler running engine. Many are in the camp that too fast of a flow doesn't allow the radiator to cool the water enough. I don't know but we need to rely on proper testing of engine temps, not just flow rates. There's allot more to engine cooling system technology that just a higher flowing impeller.
Last edited by philipswanson; 04-22-2019 at 09:42 AM. |
04-22-2019, 01:34 AM | #34 |
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Re: Flathead water pumps
Cavitation is the problem that happens when you start trying to push a pump harder then it was designed for...that is probably the reason people racing engines in the past knocked off every second fin in the pumps.
If you run an engine on a constant high rpm it will also take less horsepower that way. A pump is not only about flow...you need pressure to...so must be a compromise...height of fins/number of fins/angle of fins...what is the rpm it will be used at... |
04-23-2019, 10:15 AM | #35 |
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Re: Flathead water pumps
Hopefully Henry got it right.
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04-23-2019, 01:37 PM | #36 |
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Re: Flathead water pumps
For info only. Black ones are Carpenters and orange ones are Skip's rebuild.
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04-23-2019, 01:49 PM | #37 |
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Re: Flathead water pumps
Skip's look pretty anemic compared to Carpenter's.
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04-24-2019, 01:06 PM | #38 |
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Re: Flathead water pumps
I ve had skip's pumps in my 40 mercury for three years now with no overheating problems in traffic or at Idle,just had him do a pair for my 36.Great service and I'm totally satisfied.No B S,no excuses. ken
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04-24-2019, 02:15 PM | #39 | |
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Re: Flathead water pumps
Quote:
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04-24-2019, 03:42 PM | #40 |
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Re: Flathead water pumps
I run Skips pumps on all my flatheads. Gives me a good peace of mind.
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