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Ben Lipman
Goo Roo
SA
Soarer TT manual, plus TT track car

Posts: 2710
Reg: 04-2006

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Thursday, March 24, 2011 - 08:17 pm, by:  Ben Lipman (Ben12a)

Well two things happened today. I got home in daylight, and it stopped raining. I installed the MAN-o-meter into the car and did some testing on the freeway.

The original setup with twin tubes gave barely discernable results. I removed one of the tubes and set it up with one side inside the guard, and the other outside. This worked better.

Results-

1. the spot behind the wheel arch where all the generic vents are on Soarer guards provides a pressure differential of just 1/4 of an inch of water at 110kph.

2. The second option I explored was a vent in the top of the guard above the wheel. This showed a pressure differential of 1/4 inches of water at 70kph, and about 1/1/4 inches at 110kph!


THis was measured straight across the guard, ie putting a tube in the same spot on either side of the panel, leading me to believe that there would be decent airflow through a vent in the top of the guard, and probably not so much with a vent behind the wheel.

There are some significant what ifs: the major one being that the road car had all the stock guard liners, undertrays etc. The race car has a big air dam, better ducting of the vent either side of the main front bar opening, and an oil cooler inside each guard.

I really need to test on the track car, as I am not convinced the vent behind the wheel wouldn't work. On the other hand, more testing on the road car may also reveal some better options. Nice to see that it appears that the vent on the top of the guard would work. Guess those GT prototype guys might actually know what they're on about.

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