Looking for a smaller water pump pulley
- Thread starter logres
- Start date
He wants it to spin faster.
OK, then the question in return is why?
The water pump spins too fast at much over 3K anyways(remember these cars were meant to 'cruise' at 2K or less). It could benefit at lower rpms from a smaller pulley but then it would be spinning too fast at an even lower rpm. The better choice is a Mezeire electric pump. It will pump 55 gpm at all engine speeds, more than enough for any modded vehicle.
whiplash15
Registered
No matter what you end up doing, if you would end up with a stock pulley extra shoot me a PM, and I'll buy the old one.
bryantaylor
Registered
i might still have my stock one. i will look around if you need one.
Evans coolant, remember?
Evans coolant doesn't cavitate, so the pump can be run as fast as you want it to.
The Mezeire's can only pump around 20 gpm of Evans, because it is thicker.
First I've heard of an issue with the water pump and NPG coolant.
I'm curious. Did Evans say the Meziere pump would only move 20 gpm of NPG?
Doesn't Evans sell a water pump? It didn't appear to be much different.
Yes, the issue with the stock pump and NPG is that the pump wasn't made to move thicker coolant, which isn't an issue since I have been unable to get the temps above 240 in any conditions anyway.
Yes, the Evan's guy said the electric pump is less than half as efficient pumping NPG than water...which makes sense since NPG is about twice as thick. The disadvantage to using an electric pump is the fact that it would not be able to take advantage of more flow at higher rpms. NPG can be pumped at any rpms.
They do sell a water pump for $170, which I will be getting when my current pump dies. It is exactly the same as the stock pump save for a design change in the impeller vanes. Since NPG doesn't cavitate, the designers were able to put in a very aggressive rake angle on the impeller blades to better move NPG, but which would only cause turbulance in a water coolant.
I've found some new pump pulleys for $60, but they are fancy and too expensive to buy for a pump that could fail tomorrow (105k miles on it).
Interesting.
And perplexing.
I've been wanting to use NPG+ but I love the Meziere pump. But then again, perhaps it wouldn't be such a big deal. I just don't think you need the pump to pump so much at higher rpms. Any extra than needed is simply wasted HP. Especially if the viscosity is that much higher. I'm all about NOT wasting HP.
But then again it may be useful as a road race setup?
I guess I have more research to do. Thanks for sharing your NPG experiences.
And perplexing.
I've been wanting to use NPG+ but I love the Meziere pump. But then again, perhaps it wouldn't be such a big deal. I just don't think you need the pump to pump so much at higher rpms. Any extra than needed is simply wasted HP. Especially if the viscosity is that much higher. I'm all about NOT wasting HP.
But then again it may be useful as a road race setup?
I guess I have more research to do. Thanks for sharing your NPG experiences.
Four bolts and the pulley can be put on any pump.
Really? GM and Chrysler too, or just Ford?
I guess I would just need to find one that is the right radius and width then.
Ummm... perhaps I should clarify.
Four bolts and the pulley can be put on any replacement pump.
Ummm... perhaps I should clarify.
Four bolts and the pulley can be put on any replacement pump.
IQ of 170 and I can still be an idiot....
Interesting.
And perplexing.
I've been wanting to use NPG+ but I love the Meziere pump. But then again, perhaps it wouldn't be such a big deal. I just don't think you need the pump to pump so much at higher rpms. Any extra than needed is simply wasted HP. Especially if the viscosity is that much higher. I'm all about NOT wasting HP.
But then again it may be useful as a road race setup?
I guess I have more research to do. Thanks for sharing your NPG experiences.
Yeah, I'd guess that the Meziere would better serve a drag race application than a pulley pump. In your particular case JP, I might still recommend switching to NPG+, but also going with the electric pump. It'll be at least as efficient as a stocker in normal driving, it will eliminate the cylinder hotspots (so you can advance timing), you get the extra HP, and still be able to eliminate the heat during breaks between drags.
I am indeed more 'road' and 'autocross' oriented in what I want my Mark to be, ergo my desire for faster heat circulation.
Thanks again Wayne.
After further research into the viscosity properties of NPG+ vs. 50/50 antifreeze, it appears that at operating temperatures the difference would be minimal. I would need a pump curve on the water pump to further evaluate the actual differences in pumping efficiency of the different viscosity coolants. Evans makes another coolant specifically for race applications with somewhat less viscosity but it is recommended to be changed annually and it may not be recommended for severe freezing protection.
I agree in my application, the Meziere electric water pump and the Evans NPG+ coolant would yield the best combination.
After further research into the viscosity properties of NPG+ vs. 50/50 antifreeze, it appears that at operating temperatures the difference would be minimal. I would need a pump curve on the water pump to further evaluate the actual differences in pumping efficiency of the different viscosity coolants. Evans makes another coolant specifically for race applications with somewhat less viscosity but it is recommended to be changed annually and it may not be recommended for severe freezing protection.
I agree in my application, the Meziere electric water pump and the Evans NPG+ coolant would yield the best combination.
Yup!