HelloFan clutch is more H.P. saving as you are not havin to spin it say on the highway when its disengaged. Dont use one bracket racing as this will cause a variable and throw your dial in out the winder. If you have a clutch fan you will be able to spin the fan by hand when car is shut off with little effort.
A solid mech. fan wont turn by hand very easy. Randy(4row)H.
I have a simple knowledge of cars so does a clutch fan vs a regular
fan >make that much of a difference ?
