Water pump efficiency

[Eric Christie]

Does anyone have any experience with the discs that you rivet to the back of your water pump impeller? They are said to increase flow. I would like to get one on my vette to increase colling, yet maintain the stock appearance. Also can I reseal the plate with RTV or do I need to procuer a gasket from somewhere?

Thanks,

Eric

[Joe L.]

Re: Water pump efficiency

Eric-----

The disc only works for water pumps with fabricated steel impellers. Most original water pumps (or rebuilt original water pumps) use a cast impeller. The cast impeller is as efficient as the fabricated steel WITH the disc.

I would only recommend using a gasket to seal the backing plate to the pump casting. These backing plates can be difficult to seal and I feel that the compressive sealing provided by the thick gasket is necessary. You can get these gaskets from Dr. Rebuild.

[Joe L.]

Re: Water pump efficiency

Eric-----

The disc only works for water pumps with fabricated steel impellers. Most original water pumps (or rebuilt original water pumps) use a cast impeller. The cast impeller is as efficient as the fabricated steel WITH the disc.

I would only recommend using a gasket to seal the backing plate to the pump casting. These backing plates can be difficult to seal and I feel that the compressive sealing provided by the thick gasket is necessary. You can get these gaskets from Dr. Rebuild.

[Duke W.]

Re: Water pump efficiency

Why should flow be increased? Chevrolet spent a lot of engineering time designed and developing Corvette cooling systems. If you are having an overheating problem it is because something has degraded from original performance. You're better off repairing the system as necessary to bring it back to as new OEM performance that spending time and money of aftermarket snake oil and bandaids.

Duke

[Duke W.]

Re: Water pump efficiency

Why should flow be increased? Chevrolet spent a lot of engineering time designed and developing Corvette cooling systems. If you are having an overheating problem it is because something has degraded from original performance. You're better off repairing the system as necessary to bring it back to as new OEM performance that spending time and money of aftermarket snake oil and bandaids.

Duke

[Clem Z.]

Re: Water pump efficiency

duke ,the stamped steel ones work ok at normal RPM,but cavitate at higher RPMs because of the openings in the impeller

[Clem Z.]

Re: Water pump efficiency

duke ,the stamped steel ones work ok at normal RPM,but cavitate at higher RPMs because of the openings in the impeller

[Craig S.]

Re: Water pump efficiency

Duke - I have always been an advocate of stock too. The flow is matched to the radiator design and efficiency. I always wondered about folks wanting more flow...seems to me the more flow would mean the coolant passes through the radiator TOO FAST not allowing the radiator to cool it off sufficiently, actually causing an increase in heat. Seems like the General spent time figuring out the design, and aftermarket hype and fixes are not the hot ticket (or maybe they are the HOT ticket).....Craig

[Craig S.]

Re: Water pump efficiency

Duke - I have always been an advocate of stock too. The flow is matched to the radiator design and efficiency. I always wondered about folks wanting more flow...seems to me the more flow would mean the coolant passes through the radiator TOO FAST not allowing the radiator to cool it off sufficiently, actually causing an increase in heat. Seems like the General spent time figuring out the design, and aftermarket hype and fixes are not the hot ticket (or maybe they are the HOT ticket).....Craig