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RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   Race Car Tech (https://www.rx7club.com/race-car-tech-103/)
-   -   What is the key to autox? (https://www.rx7club.com/race-car-tech-103/what-key-autox-209330/)

Mr. ImportGuy 08-05-03 09:54 PM
Fill your tires with nitrogen, it doesn't expand when heated.

DamonB 08-06-03 05:34 PM
Originally posted by Mr. ImportGuy
Fill your tires with nitrogen, it doesn't expand when heated.
Not true. All gases expand when they are heated; they must. In fact, the air you breathe is about 85% nitrogen already if I remember correctly.

Pure nitrogen has no moisture in it so the tires' pressures climb very consistantly. Compressed air is every bit as good as long as it is dry.

Now, does filling the tires with helium reduce unsprung weight?

redrotorR1 08-07-03 10:52 AM
Sure. For a net loss of 0.0000005 lbs. :p:

adam c 08-07-03 03:58 PM
Originally posted by alberto_mg
Getting back to your original question - running a Turbo II or turbo FC in general in autocross is a bit tough b/c of the turbo lag. The extra time it takes for the boost to come on on a small autox course is rough.
Power is way overrated on an autocross course. That's why you see a lot of small, low power cars like Miata's doing very well. If you can stay smooth, and keep your momentum thru the turns, you will do very well. On a small autocross course, you really can't use the power anyway.

SleepR1 08-07-03 04:16 PM
95% driver, 5% car...


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