Has anyone modified the waterpump on an EA82 to increase flow? If so, what did you do?

Thanks

As far as I know, its never been done. The only way to do a mod is with a remote pump. Dont think it would do any good.

Well, I've seen in the hot rod small block chevy world that machining the housing .010" or so, adding some sort fo disc to the impeller, or just a different shaped impeller adds more flow. Just hoped somebody blazed this trail, already.

 

I need to replace my pump and wanted to mod it a bit while I had the chance.

 

Thanks for the reply.

If the rest of the cooling system is in good order the stock pump is quite adequate, assuming a stock or lightly modded car.

 

Gary

Hey Frank

 

I am actually looking into something like this but at a different aspect.

 

What I plan on doing is installing my radiator in the bed of my Brat. I think my biggest issue will be getting that much coolant to the back and back into the engine. I have been looking for supplimental inline pumps that would be able to be mounted between when the coolant leaves the engine and enters the radiator. Ive seen a few pumps but if any one could help on this subject please let me know!

Wouldn't going to a colder thermostat achieve what you are looking for (more coolant flow)? I mean, no matter how much extra pumping power your coolant pump can achieve, the flow will be determined by the stock thermostat right? Maybe I'm confused..........

How about an electric water pump off an '06 BMW I6 or a newer Prius? Or maybe you'd have better luck finding a universal aftermarket 12V water pump.

Oh, and I think you should try it with the stock water pump and a cooler thermostat first. It might be powerful enough.

If it's not, you'll need a pump capable of higher pressure, not so much higher flow.

 

A cooler thermostat would allow more flow at a given temperature, up until the thermostat is open wide. After which point, the warmer thermostat doesn't increase flow. The thermostat opening temp. does not affect max. flow.

Wouldn't going to a colder thermostat achieve what you are looking for (more coolant flow)? I mean, no matter how much extra pumping power your coolant pump can achieve, the flow will be determined by the stock thermostat right? Maybe I'm confused..........

The temp-rating of the thermostat really doesn't affect the flow, just when the flow occurs (disregarding the transient condition near its open point). A lower-temp thermostat can lower thermal-efficiency somewhat by keeping the coolant (and thus engine surfaces) cooler than designed.

 

I think that the water pump is the least of the problems as regards coolant flow in a standard engine. Some of the passages in the EA82 make me wonder...

A cooler thermostat would help, since it opens sooner. But what I mean is volume, not pressure, or temp.. I know that there is a limit, you get too much flow and the heat can't saturate into the water. I was just looking foe a bit more.

 

Oh well. I guess I'll stick to the Water Wetter.

You need to install a high efficiency 2 row radiator and a fresh OE Factory SUBARU thermostat and gasket.

 

that will solve any and all cooling issues unless there are leaks/blockages in the system.