Hot 318

valiant74 said
Sounds like the flex fan has got to go. I have a steel 4 blade (original) and a new steel 6 blade. Any thoughts on the best?

The viscous fan is best, but as quoted below.......

I'm Sorry Have A Horrible Habit Of Wanting To Use Stock Heavy Duty Componets (within Reason)from All Years Models That Will Work Without Heavy Modding...

And with good reason. Some of the stock parts are very very good and make there way into the MP catolog as HP parts. Not every thermoclutch fan is the same as a MP Viscous though some will scream it is and swear to the heavens I'm wrong.
The only problem is old clutchs wear out and can/could have leeaked in the past making them inefficeient. (Humm, sp!)

Dusterb318

It states in the MP A engine book to stay away from the A/C pumps...you are supposed to use and 8-blade HD pump for a non-A/C car for extra flow.

I just read the entire cooling systems chapter. I might have missed it. Tell me where. It does say the 8 blade pump for circle track race engines. It also states there OK for service replacement. BEcause thats what they really are.

The use of a 6 place can replace that of an 8 blade to use less HP is the only thing I see.
Somewhere it also said if cooling was an issue still, to swap to the 8 blade unit.