Custom mechanical fan builder

Velocity111 said
start stop driving it gets hot. highway driving will stop the increase of temp, and may even drop it a couple of degrees, but it won't drop it back down to what I would think is normal operating temps. Typically it's just a slow and steady rise in temp past 200 degrees, then i shut her down.

That sounds like a radiator problem. If it was just a fan problem, cruising at speed should lower the temperature significantly.

The other possibility is a water flow issue, but a 1.3:1 pulley ratio should be fine. What water pump is in it? 6 or 8 vane?

If you have the pulley matched to the proper pump an electric pump is just expensive. For a drag only car fine whatever. On the street I’d never use anything other than a mechanical pump.

famous bob said
I had to repost this, I pulled a floor jack out from under the fish, trying to move the front over a little , i bent the front splash pan and the griffin 2 row rad. , I tested it and no leaks , been running it for about 9-10 yrs now !
ANYONE TELL U A GRIFFIN AINT ANY GOOD IS FULL OF B.S. !!

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Who cares? The important thing about a radiator is not how it stands up to a floor jack, it’s how well it cools the car. And the OP is not the first guy to have issues with a really expensive Griffin NOT cooling his car.