[Roadsters] Large Diameter Water Pump Pulley

[Howard @ Everything Christmas]

Hi All,

Does anyone know where I can purchase a Large Diameter Water Pump Pulley.
Preferably not for a Kings Randsom

I need to slow down the water pump to try and get my engine cooler on a Solex
Equipped U20 engine on my Race Car.
I am already using a 4 core radiator and ducting to direct the air straight
into the radiator. I need to pull the water temp back 20 degrees c or so. and
this is one step.

I know one is made for the SR20, but is there anything around for the U20 ?

I installed one that I think came from the Z family that was slightly larger,
but I would like to try and extra step to something like an 8" diameter as the
engine mainly runs 4000 to 7500 for circuit racing , up to 60 mile events.

Oh, it is a highly developed race only engine professionally built by a race
engine specialist.

Regards,

Howard, Datsun 2000 Solex 3 of them: one race one road(nearly) and one wreck.