Clutch fan

Always busting my chops Rusty :) brand new Hayden heavy duty thermal fan clutch, P/N 2947. Always in search of better mpg (and power) thought I might give this a try.

I stated this before , I tested a bunch of fans two summers ago , and run a clutch type on my 505 now , good in 100* okla heat , a full mech fan is about 8* better than a clutch fan on my car.
I run a 17' clutch fan , and a 14'' elec pusher in the front , kicks on at 200 off at 205. Have an 18'' clutch type 7 blade to put on if needed , but doesn`t seem to .