TX-2019-Black_GT
Well-Known Member
Regarding fans, CFM, etc. , I just ran some simple, and correct, calculations. The radiator is 20x25 inches (GT and PP, but PP is thicker). 11 MPH = 3400 CFM. 50 MPH = 15000 CFM. This assumes the air going through the entire radiator at the speeds mentioned, which is not perfect, but it clearly puts the CFM delivered by a fan vs. that due to driving speed into perspective.I keep seeing the images posted on here in various threads of the above GT500 electric fan. But what I don’t see or can’t find are the specs on it.
Does anyone know what the CFM (cubic feet per minute) is of that fan - and is the CFM based on the high or low speed?
CFM’s are also key to keeping any rad core cool. The higher the CFM, the cooler you can keep the rad core.
The other important thing with any electric fan shroud is that a high quality fan will have the integrated “flaps” as seen on the GT500 shroud. Those flaps allow air pass through at certain speeds to reduce the pressure around the system.
Just as an example, on my 94 Cobra I have the SPAL dual 11” fan setup, where the shroud also has integrated flaps. This fan is rated at 2720 CFM (some specs show 2780), which is more than enough for a street application. I also have wired it into a aftermarket fan controller (but tapped into factory harnesses so it operates exactly as the stock unit did), but when the fans do come on, I also wired it so they come on at “high speed” even though the unit can do the gradient low to high operation.
I am very interested in the GT500 fan but am very curious as to it’s specs - can anyone get the CFM of that unit?
If some are having cooling difficulties, despite upgrading other components, changing t-stat, etc., look into upgrading the electric fan and compare CFM ratings, higher CFM is best and it may help.
So everyone that said fans are no help on the track, at speed, is right!
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