Personal opinion I suppose. Could not find a view of the impeller on the Tuff Stuff pump, but I am going to say it is similar to factory.Does anyone have a recommendation on a new water pump for this build? I was thinking of Flow Kooler #1649 or a Tuff Stuff #1475.
Any thoughts one way or the other?
Thank you Jim. I always appreciate your sage advicePersonal opinion I suppose. Could not find a view of the impeller on the Tuff Stuff pump, but I am going to say it is similar to factory.
Flow Kooler seems to be liked by many, but seeing it flows way more at lower RPM's, I personally don't think I want that flow to ramp up too high as the engine's RPM's start to reach peak. Could the pump produce enough pressures to pop a water hose or exert unneeded pressures on a radiator? I think it may work much better on an engine having the pulleys that reduce water pump speeds at the lower RPM's so as not to pump too much pressures at higher RPM's. Would also seem to me that moving a higher GPM water pump must have the coolant flow within the block/radiator to work best. If not, would the pressure build up at the water pump create a power loss, or belt slippage, if the rest of the cooling system could not handle the high GPM water pump flow? I am no expert of course, and don't know if any real world testing has ever been done - might be interesting.
So this may be your call. Do some internet reviews on Pontiac as well as other makes.
I am going with the Milodon version which someone said was made/same as GNB. They also have the high flow T-stats which Tuff-Stuff also offers. I got my pump from Summit. Never had a cooling issue with any stock pumps, but your cooling system has to be matched to the engine's HP/TQ which is more about the radiator and air flow, not water flow - my opinion.
Thank you for the replies Jim.A couple of things i forgot to mention above.. That heat transfer is more critical on iron heads than aluminum and you might look into aluminum radiators. Aluminum dissipates heat faster/better than the old style copper ones..