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Discussion Starter #1
this is probley a really silly question/idear but if you had a smaller water pump pully made and fitted the pump would spin faster, pumping water around the engine at a higher speed, would this cool the engine faster and better?
is it worth having a smaller pully made as mine is bent and i need another either way.
what water pump pullys fit the rb25 waterpump??
is there a smaller pully that fits, the ca18det is bigger and the bolt holes dont line up and the center hole is smaller.

i dont mind re-drilling the holes to fit a smaller one if the idear would work.
 

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Actually the water pumps in most cars are over specified, because they have to pump water round the block OK at lower speeds.
What tends to happen is that at high rpms stock water pumps starts cavitating and its this that stops them pumping properly.
The N1 type uprated pump has larger, deeper blades and an anti cavitation desinged backplate.
perhaps of more interest to you as you have a bent pulley, you can get underdrive pulley wheels, which slow the pump, enabling you to run higher rpm.
 
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