Quote:
Originally Posted by BBC69Camaro
Hey Chicane -
I was looking at CarlC's pictures of his radiator. I'm sure his setup works wonders. But I don't see a shroud over the radiator. Wouldn't you want a shroud to make sure the air is pulled through more of the radiator instead of just what the fan covers?
I'm certainly no expert but my understanding is the more area you can pull air through the greater the cooling.
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You're correct to a point. When the car is moving at anything over about 35 mph, you don't need the fan(s). This is why a GM ECM for instance includes a MPH shut off as well as a temp shut off. When air is being forced through the radiator with just the movement of the car, a shroud covering the whole radiator can block the air by forcing it through the shroud opening only. Factory fan shrouds do not cover a radiator completely either. I'm sure full race cars may be different but for a street car, a full shroud is not necessary usually.