Well I just meant take the airfilter off for that race! I am assuming that it won't be on a dirt road. I differ on the tire inflation deal though. If the rear tires had a problem with spinning then yes lower the pressures a few lbs, but not too much, but the N/A auto supra is not going to spin the tires, so for less rolling resistance I still suggest bringing the tire inflation up to at least the recommende limit. It will mean less rolling resistance and the difference will be so slight as to not even be noticeable as far as the ride goes, but it will help mileage and it will make the car roll better. When you are done with the race and if it is too rough, back the pressures back to 30 or so.
You are probably right about the wind resistance with the top off, so keep it on and keep the windows rolled up during the race. You WILL notice a difference with the air filter off, even if you have a K & N filter and the difference will be a little bit faster car.
Russ
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