High performance water pump

[Bill R.]

flow and pressure of the pump can just cause more heating problems rather than less. You want the water to flow through the radiator at a certain speed allowing it to transfer as much heat as possible while its in the radiator. Frequently higher volume pumps move the water through the radiator too fast , not allowing enough time to pull as much heat away from the coolant as possible. Not to mention that the more pressure and volume the pump puts out ,the more horsepower it steals from the engine to do so.
I've never had any problems here in arizona running the stock pumps and stock radiators on bmw's

So, i keep seeing this thing in the roundel and wondered what you guys thought of it for the e34 when the pump needs replacement.

Good for the money?

http://www.bmpdesign.com/product-exe...earch_model/48

[fkong777]

I dont think it will help to have higher water pump pressure. The flow of water will still need to go thru the restriction of the termostat. Unless you have a larger radiator and running without a termostat. It would be useless.

Can be useful for Race tuned M50 but not really so much for a street driven M50.

[granit_silber]

flow and pressure of the pump can just cause more heating problems rather than less. You want the water to flow through the radiator at a certain speed allowing it to transfer as much heat as possible while its in the radiator. Frequently higher volume pumps move the water through the radiator too fast , not allowing enough time to pull as much heat away from the coolant as possible. Not to mention that the more pressure and volume the pump puts out ,the more horsepower it steals from the engine to do so.
I've never had any problems here in arizona running the stock pumps and stock radiators on bmw's

Bill,

That makes a ton of sense. I was planning to purchase that pump when my current pump's time is up. Thanks for saving me the cash!

-ashley