water pump

If you want a HV Water pump from a standard pump. pull the impeller off and repress it on less. aka taking up all the space between the impeller and the housing. or do what i did and have a 1/4 inch plate of alu welded in to the housing and then machined so that it just kiss the housing with out the gasket.

If you are running a t-stat you my have to give it a little bit more room for.......cavitation???? when the t-state is close.
remember your talking to a racers mind not a street mind.:D