Quote Originally Posted by chevy 37
On my 37 the engine is too close to my radiator and my water pump is only about a 1" from the radiator so I have to use a push fan. I set mine at 190 degrees and it works fine. If stopped for periods of time, if the temperature goes over 190 then the fan comes one and cools it down with a minute.

I have much the same problem in my 455 Buick powered 32 roadster.

Solved by machining the front sheave off a three sheave pulley and bringing the fan back as far as possible.
In fact, it clears the alternator pulley by 1/8", but that's ok because the blades pull forward when the engine is running.

The trick here is to use a wide blade stainless flex fan that has the blades set back from the hub.
Other similar fans have the blades centered on the hub and these blades protrude too far forward to be usable in my car.

The fan I'm using is a Hayden 17" diameter 6 blade with wide stainless blades.

I tried a Derale 6 blade with the same dimensions etc., but the blades are centered on the hub.
Hayden fan blades - in the wide stainless blade models - have the blades set toward the rear.