Run electric fans all the time?

DrCharles said

CVF says their basic serpentine conversion is 0.92:1 underdrive. No good.

A 3-groove crank pulley (using the outer groove) and a 2-groove a/c WP pulley (using the inner groove) supposedly will line up. Alternator will need remounting. The problem is that the belt will be running very close to the Contour fan shroud since it'll be a lot further forward. So the faster water pump is not proving very practical in the limited A-body space.

I'm going to install a PWM controller and see if I can keep the temps cooler in the first place (no point in letting it get to 198 before the fans come on).

Click to expand...

WTH?? They really said that? I actually called them and I wrote down the pulley diameters for the serpentine system. The crank is 6.4 inches and the water pump is 5.4 inches which is a skosh over 18% overdriven.

I won’t be home until Wednesday afternoon but when I get there, I can pull the receipt for the pulleys I now have. IIRC I ended up with a crank pulley they have listed as a big block part or it was the water pump pulley, I forget which.

Like I said...when I did mine, I didn’t want the serpentine system either. Since I only need 1 groove everything, I didn’t think it was a big deal. Now, I’m spending twice, which I hate doing to get the water pump speed where I want it.

I’ll let you know Wednesday what the part numbers are of the pulleys I have.