Gets hot and stalls out

itsfishy said

I’ve tried all kinds of things to get it down: currently has an aluminum radiator, custom shroud, gap on the water pump, pulled some blades from the pump. I’ve seen all kinds of other suggestions on the forum but haven’t tried any yet. If you have some simple-to-try suggestions to start with please tell me! One I saw that looked interesting was reducing the flow, which was almost counterintuitive to me. Please keep in mind that 110-112 degree days isn’t unusual in west Texas, so I’d be ecstatic to get the temp down!

Click to expand...

I’m not sure why you went to less blades on the pump. I use Milodon high volume pumps and they have 8 impellers.

You should be using a mechanical fan.

The water pump should turn no less than crank speed. So 1:1 should be the slowest you run the pump. Over driven is best.

Don’t forget the fan turns the same speed as the pump. Slow down the pump, you slow down the fan. That’s the last thing you want.

At high ambient temps and low rpm situations you need as much coolant and air flow that you can get. Slowing down the pump is bad policy.