Water pump pulley compatibility

Are all year 240 water pump pulleys the same? I want to get one to have powder coated, or maybe get the aluminum one that KL racing sells. I?ll be putting it onto a 1976 b21.

There are a few different diameters used throughout the 8v engines.
There are also some that are reinforced at the hub (good!).

I prefer the large diameter and reinforced pulleys for racing. What you have should be the large diameter, the turbo engines got a smaller diameter pulley for more water pump flow (not needed IMO).

culberro said:

I prefer the large diameter and reinforced pulleys for racing. What you have should be the large diameter, the turbo engines got a smaller diameter pulley for more water pump flow (not needed IMO).

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would the introduction of an underdrive pulley at the crank influence that thought at all?

Stiggy Pop said:

would the introduction of an underdrive pulley at the crank influence that thought at all?

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I still use the larger diameter water pump pulley with an under drive crank setup.

Check out some of the Smokey Yunick setups. They?re like 1.5-2:1 reductions for the water pump.

The turbo rally car sits at 210-220f when held at 25psi and full load for 10-15min using an under drive crank and large diameter WP pulley with a mechanical fan setup.

Small pulley is good for the 700Ts that would idle with the A/C on in their day with a lot of heat soak with the water cooled turbo/same size radiator etc.
Only came on the B230FT cars.
Lot of overheats on those in routine use.

That said, the small pulley cost me a couple heater cores over 4500RPM & isn't really helping.

B230 have a larger crank pulley than B21/B23. The non-reinforced & couple years only ~late 82-early 84 pulleys I've seen shatter...sometimes?
Only those years...not sure what happened there?

Tropical fan clutch + pusher fan at idle is about max traction & surface area/grip of alt + WP about equal to the B21/23 crank pulley with everything in good shape/stock dual belts.

Kjets On a Plane said:

Small pulley is good for the 700Ts that would idle with the A/C on in their day with a lot of heat soak with the water cooled turbo/same size radiator etc.
Only came on the B230FT cars.
Lot of overheats on those in routine use.

That said, the small pulley cost me a couple heater cores over 4500RPM & isn't really helping.

B230 have a larger crank pulley than B21/B23. The non-reinforced & couple years only ~late 82-early 84 pulleys I've seen shatter...sometimes?
Only those years...not sure what happened there?

Tropical fan clutch + pusher fan at idle is about max traction & surface area/grip of alt + WP about equal to the B21/23 crank pulley with everything in good shape/stock dual belts.

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+1 unless you want to lose your mind doing the Dbarton 4 speed E-fan thing.

Speaking of which did he ever get that working right?

I had an early wp pulley shatter and f!#$ some stuff up, it cut the mechanical oil pressure gauge line I had and the cam seized in the head. I now have the thicker WP pulley from a 940T.

So what type of pulley should I be looking for? I’m not working towards any performance gains (yet) but if there is a “beefier” pulley I could use I with my current set up I’d be ok with that. I’m really just trying to clean my engine bay up and make stuff shiny for now, but I also don’t want to spend money on powder coating something that could shatter if I do decide to up the power later on.

I haven't seen a later B230F pulley shatter?

I'd get the small pulley off there though.