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Thread: Cooling CFM
07-08-2013, 03:37 PM #1
This is a good summer time topic
Does anyone know what is the minimum CFM GM engine fans are at?
(V8s only, of course)
I just bought a 3,000 cfm fan and, It let the truck overheat.
I gained 4mpg though, so I would rather not go back to the almost 6lbs of mechanical fan robing horse power.
I figure the stock fan, in full clutch-lock probably pulls 4,000 cfm... at least.
so now its either back to stock; or buy another fan, put them together, and suck 6,000 cfm (and possibly small birds) through the front...
I found it.
needs to be a bare min of 5,000 cfm
over 5,500 CFM if your towing.....
I had no idea that much air needs to pass through the grill, condenser, and radiator, etc.
Last edited by K15 Blazer Guy; 07-09-2013 at 04:49 PM. Reason: updateGas was $1.83 when Obama took office.....