thermal / non thermal fan clutch?

[bob shaner]

What is the difference? which is better on a 318 for the street? also Mopar viscous fan is that the same, thanx

 

[rumblefish360]

A thermo clutch fan is as the name implies, heat activated. As is gets hotter, the fan clutch will enguage to drive the fan, when cool, theres a bit of disengaugement.

A non thermo fan is driven 100% all the time.

A Mopar viscous fan is a thermo fan and constantly dyno's the best numbers over all other fnas except an electric fan since it has no parrasidic loss from the belt.

A MP Viscous fan is your best bet mechanical fan next to the electric fan.

 

[bob shaner]

Thanx rumblefish, I found a stock fan shroud in perfect condition in the junkyard (not a easy find) for $17.00!! So I'm going to get rid of the fixed fan and install a clutch fan when I install the shroud.

 

[rumblefish360]

Diameter may be an issue. Is the shroud a V-8 unit?

 

[bob shaner]

Yes, it came out of a Valiant w/318 22" radiator like mine.

 

[rumblefish360]

Sweet! Your in.