Water Pump Questions

[MontyF]

Originally Posted by FED 387

another thing to consider is that even tho a brass radiator weighs more than an aluminum one it cools BETTER( brass does)-look at the new cars some of them have 2 huge electric fans running most of the time just to keep the engine temp at a certain level (mainly for pollution control)- so ya gotta figure out what do ya wanna do---- do you really need that water zinging thru the system or are ya trying to cool the system ??? the water really needs to go thru slower to extract the heat out of the engine just cuz its going fast doesnt necessarily means its doing a good job of cooling !!!!

Auctually my experience hasn't shown that to be the case. On hard to cool street engines a new large four core (brass/copper) radiator doesn't cool better than a smaller two row aluminum using the same fan set-up. I don't know how to explain it based on thermal conductivity but it's true.

Also according to Howard Stewart moving the water faster through a race engine will remove more BTU/Hr. They say slowing the water flow is of no benefit.