Originally Posted By: snowman4839
Anyone have any reason to not use the stock water pump?

The turbos I'm looking at are the GT4202R and the GTX4294R. They're 74mm and 70mm turbos respectively. I did the math for their compressor maps and it puts them right in the optimum range for 450hp and even more so for 700hp for the future.

They're water cooled so I'd have to find where to plumb that coolant to and from. Any ideas? Would that place you suggested the petcock work?


I am not sure what the best water pump to use is.
I know the original old style cast iron impeller ones worked pretty good, the stamped steal impellers, I never really have good luck w/those as far as cooling the best.
Anyone? Suggestions?

That GT4202R turbo is about the same size I want to get.
Might be a bit much for your app, but if you are ready for that size of a turbo, I say go for it.
I do not think you can get a small A/R for the turbine housing so there is going to be turbo lag.

I did not know Muncie trans can have an OD?

The water drain hole I suggested for a petcock will work for a water cooling a turbo.

I thought you were going to use you current turbo.
Those Garrett turbos are pricey, about $2000 or so, unless you are looking for a knock off one?

http://www.ebay.com/itm/Genuine-Garrett-...3e3&vxp=mtr

Knock off
http://www.ebay.com/itm/GT42-turbocharge...248&vxp=mtr

MBHD


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