"Performance" Water pump feedback

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71duster06

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Good evening all. I'm replacing my water pump as my previous failed and started leaking. I know there are "performance" pumps out there to help flow at idle and prevent cavitation at high rpm for $100+. At rockauto I found the following two pumps that have the same improved impeller but for half the cost. Anyone use these pumps that can give some feedback?

Thanks in advance

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For a mostly stock motor, the two pumps will do fine with a somewhat improved flow. For real hypo motors the more expensive, greatly improved flow (impeller and housing improvements) and stronger shaft and bearings is the way to go.
 
Just buy the Milodon and be done with it. Also, make sure you don't under drive the water pump. It needs to be 1:1 at the minimum.
 
My Milodon HV pump was new in the early 2000s and is still doing it's job. Yeah the initial buy-in was a lil higher, but in the long run, it's turning out to be pretty cheap..... kindof like the Optima battery.
 
Good evening all. I'm replacing my water pump as my previous failed and started leaking. I know there are "performance" pumps out there to help flow at idle and prevent cavitation at high rpm for $100+. At rockauto I found the following two pumps that have the same improved impeller but for half the cost. Anyone use these pumps that can give some feedback?

Thanks in advance

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After seeing the difference in thermostats I think they bottle neck the system. Pump all the coolant you want, won’t do much good if it can’t flow..
Thermostat comparison
 
Just installed a Flowcooler water pump on my BB. My original fan bolts were now too long and locking up the fan. Flowcooler housing is larger in front bearing area. Had to shorten my original bolts 1/4". But otherwise a good pump.
 
Just installed a Flowcooler water pump on my BB. My original fan bolts were now too long and locking up the fan. Flowcooler housing is larger in front bearing area. Had to shorten my original bolts 1/4". But otherwise a good pump.

Interesting , I put a flow cooler on my 505 last summer and didn`t have that problem . ???
 
I have the Flow cooler on my 408" with no issues (track or street). On inspection I noticed its a GMB casting (most remans use or are GMB) with an anodized impeller attached.

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Famous Bob-I think that I had a too long bolt issue because my BB install is in an 'A' body and uses the short spacer (1"?) while the original bolts appear to be the same used on the thicker spacer, the extra length not being a problem until now. Or, I just have the wrong original bolts. I could be wrong.
 
Same with my circa 1996 Milodon water pump.
GMB is an extremely large reman company doing pumps and fuel components, I stated that to show its a stock casting and maybe bearings and seals with Flow Coolers impeller. I had an Edelbrock and Milodon, Both had GMB castings with proprietary impellers. FWIW the Eddy and Milodon both failed (leaks) the flow cooler is still going strong with more abuse than the other 2.
 
Thanks for the feedback everyone. Just ordered a Flowcooler pump and high flow stat. Curious how well it works.


If you didn't get the thermostat from Stewart Components it probably won't be any better than a stocker. I should have put that in my above post.

There is only one true high flow thermostat and it's from Stewart components. It's more expensive but it actually flow more unlike the others.
 
If you didn't get the thermostat from Stewart Components it probably won't be any better than a stocker. I should have put that in my above post.

There is only one true high flow thermostat and it's from Stewart components. It's more expensive but it actually flow more unlike the others.
Yes I did go with the Stewart stat.
 
everyone o know with a flowcooler seem tol ove it.

I have never seen a flow kooler pump , or any pump that looks like mine. It has a bunch of straight tapered fins/ fins get longer as they get to the center, and a bunch of them. Are anodized blue . Wondering if all big block pumps are like that .
 
My experience with Flowkooler has been good. I'm running two of them on small blocks and they are working well. For thermostats the Stewarts are the way to go. I'm currently running some old trusty Robertshaws I had stashed away after having several new Mr Gasket units fail.
 
Then you did GOOD. That's the best out there. If you have the rest of the system up to par, you'll have trouble getting temp in the engine.

Y R , I used the same thermostat, in fact , much of my cooling system is like u described in old/past threads.
I have tried a "bunch " of diff. stuff and came back to mostly the original belt driven set up. I have the cooling problem whipped , but still have a tremendous amount of underhood heat to deal with. Altho I would be up to try a little smaller water pump pulley just for grins,
I`ve tried about everything else. Most of what I tried would work on a lesser h.p. engine tho-------
 
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