Fan CFM's
Former Moderator. RIP Icemark.
Joined: Apr 2001
Posts: 25,896
Likes: 24
From: Rohnert Park CA
Originally Posted by classicauto
Im having trouble keeping the car cool:
Do you have:
OEM thermostat? (of KNOWN condition)
Undertray?
A rad with a clear core and not too many bent fins?
Two belts running your water pump?
OEM rad cap? (of KNOWN condition)
Do you have:
OEM thermostat? (of KNOWN condition)
Undertray?
A rad with a clear core and not too many bent fins?
Two belts running your water pump?
OEM rad cap? (of KNOWN condition)
He who smokes bitches
Joined: Jun 2005
Posts: 3,452
Likes: 0
From: El Dorado County
Originally Posted by NZConvertible
They should be placed at the spot the hood that has the maximum pressure differential across it (lower pressure above obviously), to maximise the suction of the air out of the engine bay. The only way to do that is to measure the pressures at lots of spots above and below the hood using a very sensive pressure gauge. This is more trouble than most people can be bother with, so they just stick them where they think looks best...
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
No, I've never done that testing. In pretty much all cars it'll be closer to the front, as that's where the low-pressure zone above the hood exists.
I know someone's bound to read this and post up that FC pressure profile, but that only shows the pressures above the hood. You need to know the pressure difference between the hood's top and bottom surfaces to find the ideal spot. The pressure in the engine bay varies far more than you'd think.
I know someone's bound to read this and post up that FC pressure profile, but that only shows the pressures above the hood. You need to know the pressure difference between the hood's top and bottom surfaces to find the ideal spot. The pressure in the engine bay varies far more than you'd think.
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
Originally Posted by Icemark
I think we might have to add that to the FAQ for FC
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