How did you mount them ?
These pictures were taken at night with the flash, so they didn't turn out so well. I will take some good ones this weekend at Rubicon.
When I get back from this trip, I am going to mount 4 120mm Computer case fans, 2 on each vent. Here is a picture of a 80mm fan:
The 120mm fans are about 4.7x4.7. I have not measured the vents, but I think they will fit nicely.
The good thing about the computer fans is that a local computer shop sells 120mm fans for $1.99 each, they are 12-volt, and they only draw 0.3-A each. So with all four going, it will only draw 1.2 amps, which is the equivalent of a 14.4 watt light bulb, which is nothing. I will hook them up to a temp switch, so at a traffic light or while Crawling they can cycle on and off.
Also, for night time Crawling, I was thinking about running some bling case fans that light up:
They would cost a bit more, but it would look KILLER with the blue light emitting from the hood scoops in the dark!! If the light is on a separate circuit, then I would turn the lights on when I am parked at camp. If they are just LEDs, then I would just leave the lights on all night!