Hey guys, So My 347 is built, my 4r70w is rebuilt and I am getting a trans controller from Baumann controllers. I am also going with a new eagle radiator (Step up from Champion) Now my engine I believe will be a higher reving engine because its stroked but I maybe wrong. I was told to get a 2000rpm stall converter.

So my question is have any of you guys ran a clutch fan setup that could safely handle more then 4000 rpm. The truck as it drives now gets to about 3200 regularly on the highway and like 6 miles to the gallon sinces its old, tired and I had a bit of blow by. I want to run a clutch fan to get back some of that robbed HP but I hear flex fans blow apart. Thoughts?

 

I wouldn't worry about the clutch up to at least 5,000rpm. They release a bit as rpm increases. The best ones are rpm and temperature controlled.

I prefer electric fans myself. Mine never even turn on in the winter.

 

Agree the clutch limits fan RPM. My hotrod runs a thermal clutch with steel fan and gets run up to 6,500 RPM w/o issue. The thermal clutch is preferred IMO as it only tightens up when the engine gets hot... less drag and noise and maybe a tiny bit better fuel consumption.