Author Topic: Water pump impeller  (Read 333 times)

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Offline Greg Dobe

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Water pump impeller
« on: May 17, 2019, 05:52:48 pm »
Hi All,

Was wondering if any one has flow tested or experienced the difference between an original cast impeller against a new pressed steel style?

From looking at the design the pressed steel should flow more, however the cast is a disk style which could be more efficient. I have the choice of install either and would like to fit the one with the that actually works the best.

Regards Greg.
0F05R SCJ
9T02R SCJ

Offline Brian Conway

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Re: Water pump impeller
« Reply #1 on: May 17, 2019, 07:13:33 pm »
I run the stock pump/impeller with my stock cooling system.  Preforms as expected and has never over heated or had any problems.  Flowing more may not be a good thing ?  Brian
65 5R09A 4 spd  GT  Built 5/29/65 
69 9T02R 4 spd  SCJ Built 9/19/68
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Offline Greg Dobe

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Re: Water pump impeller
« Reply #2 on: May 17, 2019, 07:56:58 pm »
Thanks Brian, your correct in saying more flow is not always better. I am guessing the design being a replacement should be the same flow rate. Was wondering if anyone can confirm or has had a bad or good experience with the replacement?

Engine is basically stock, just running a 270H cam. Stock radiator and fan.

Regards Greg.

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Online 69cobrajetrugae2

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Re: Water pump impeller
« Reply #3 on: May 17, 2019, 08:55:23 pm »
+1 Brian.

Fluid dynamics with regard to our cooling system is best left in the stock configuration.  The clearance between the impeller and the water pump back plate is important as well.  It's easy to replace the bearing and seal assembly using a hydraulic press.

« Last Edit: May 17, 2019, 10:26:43 pm by 69cobrajetrugae2 »

Offline Greg Dobe

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Re: Water pump impeller
« Reply #4 on: May 23, 2019, 05:56:06 am »
Thanks Guys, I took the advice and went with the original impeller. All together and installed.

Regards Greg
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