Mech fan suggestions…..

Make sure the hose is hot before you check it.
Run it up tp 2500 rpm when you check the hose.
Do a direct drive fan, you will lose 20% fan speed with a clutch set up.

I'm doing direct drive out of necessity, as it's all I can fit, no room for a clutch. I still don't understand why people are saying you need a clutch???? I think the DD set up has better pull and take sup less room.