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About three years ago, after a very engaging pro versus con thread on electric water pumps, I decided to give it a try. Since I wasn't convinced about the benefits of electric water pumps, I bought the cheapest water pump I could find at the Pomona Swap meet. I bought the pump everybody said not to, the infamous Pro Comp, made on the opposite side of the world. Hey, if it didn't work out, I'd return to my Edelbrock belt driven pump. If it worked out, I'd replace the Pro Comp with a higher quality pump.
Well, the Pro Comp lived up to its reputation. I had to disassemble the three piece housing, machine the wings that mount to the block, just to get it to fit. Apparently they make the water pump adaptable to different engines by making these wings interchangeable. The second problem was the water hose adapter hit my harmonic balancer. I had to hack it in two, and mount the lower radiated water hose away from the water pump. After all of that to get it to fit, it worked beautifully. It wasn't loud, and it cooled really well. No problems for almost three years until this past July 4th. I guess the seal between the impeller and the motor failed, water got into the motor, and a big short. Check out the mess.
About three years ago, after a very engaging pro versus con thread on water pumps, I decided to give it a try. Since I wasn't convinced about the benefits of electric water pumps, I bought the cheapest water pump I could find at the Pomona Swap meet. I bought the pump everybody said not to, the infamous Pro Comp, made on the opposite side of the world. Hey, if it didn't work out, I'd return to my Edelbrock belt driven pump. If it worked out, I'd replace the Pro Comp with a higher quality pump.
Well, the Pro Comp lived up to its reputation. I had to disassemble the three piece housing, machine the wings that mount to the block, just to get it to fit. Apparently they make the water pump adaptable to different engines by making these wings interchangeable. The second problem was the water hose adapter hit my harmonic balancer. I had to hack it in two, and mount the lower radiated water hose away from the water pump. After all of that to get it to fit, it worked beautifully. It wasn't loud, and it cooled really well. No problems for almost three years until this past July 4th. I guess the seal between the impeller and the motor failed, water got into the motor, and a big short. Check out the mess.
1st, what is the weight difference between an aluminum WP and the electric? if anyone would know this it would be you:-)
2nd, does a electric water pump take less power from the engine to run like electric fans do?
3rd, does it cool any better than a standard WP?
would love to know all the answers to these questions, as I may change mine on the new 427 build..
Thx Bee Jay!!! p:-)
Last edited by pauldana; Jul 10, 2013 at 01:37 AM.
I did some research and narrowed my choice between the Pro Form polished 66225P, and Pro Form 151-654. I couldn't determine the difference between the two so I called the Summit tech line. 151-654 is sold thru Chevy, and has the Chevy Bow Tie right on it. 66225 is identical, but no Chevy Bow Tie And is $30 cheaper. Guess which one I bought. I guess someone has to pay for the brand merchandising fees. The new pump has a one piece housing, a correctly aligned hose pipe (a $15 value, included for free) and bolted right in. It even came with a fused wire harness, bolts, and gaskets. One problem I think, they said that the polished pump is powder coated. I don't think it is. I was hoping that I wouldn't need to keep this puppy polished. Maybe I should have gotten the chrome or anodized version. It weighs six pounds and flows 35 GPH. I'll drive it tomorrow to see if it works as good as the junk Pro Comp did.
1st, what is the weight difference between an aluminum WP and the electric? if anyone would know this it would be you:-)
2nd, does a electric water pump take less power from the engine to run like electric fans do?
3rd, does it cool any better than a standard WP?
would love to know all the answers to these questions, as I may change mine on the new 427 build..
Th Bee Jay!!! p:-)
2. Yes, at high RPM. No, at low RPM. They run at constant speed (typically). A water pump has a somewhat static maximum flow rate, once you exceed that you're wasting HP. However, converting from mechanical to electric to mechanical is not cheap, so when you're below that peak efficiency you're losing power.
3. Possibly, at really high RPM, I doubt there's any real difference otherwise.
I'm not a fan of electric wp's on "street driven" vehicles only because if they fail you are STUCK. That could be said of alot of parts I know but electrical parts fail all the time and its just such a vital part that moves ALOT of fluid constantly I'd just as soon stick with the mechanical style. Now on a race only vehicle thats a different story.
I'm not a fan of electric wp's on "street driven" vehicles only because if they fail you are STUCK. That could be said of alot of parts I know but electrical parts fail all the time and its just such a vital part that moves ALOT of fluid constantly I'd just as soon stick with the mechanical style. Now on a race only vehicle thats a different story.
I felt the same way for a while. But now I'm not a fan of belt driven water pumps. Lose a belt, and you are STUCK. Mechanical water pumps fail too, and your just as STUCK. I think that eventually OEMs will go to electric water pumps just like they did with radiator fans. Less parasitic drag and lighter weight. Also a computer can turn it on or off, or even adjust speed. I'd like to add a delay so that my water pump runs for a minute or two after shut down.
Bee Jay
Edit: I don't think any OEM with fuel injection has mechanical fuel pumps anymore. I have an electric fuel pump with my aftermarket fuel injection. Electric fans, electric water pump, electric fuel pump. Hey, I have a Hybrid.
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Originally Posted by Bee Jay
The electric water pump weighs six pounds. I'll try to dig up my old aluminum water pump to weigh it.
I weighed a C4 water pump a while back when I was trying to figure out if I could lose a couple pounds adapting a smallblock pump onto a big block. The smallblock pump was 5.7#. That does not include the pulley or belt weight, which the electric pump doesn't need.
Hey Bee Jay you might like to look at this thread. There are bunches of skeptics there that can tell you why it will not work even though you have proven it will. kind of like the bumble bee flying theory, "Bumble Bees physically cannot fly but they don't know so they so anyway".
"Aluminum radiator with electric fans and water pump"