What is the key to autox?

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Aug 5, 2003 | 09:54 PM

#26

Mr. ImportGuy

Looking for Another RX7

Joined: Jan 2002

Posts: 692

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From: West Bloomfield MI

Fill your tires with nitrogen, it doesn't expand when heated.

Aug 6, 2003 | 05:34 PM

#27

DamonB

Lives on the Forum

Joined: Feb 2001

Posts: 9,617

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From: Dallas

Quote:

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?

Aug 7, 2003 | 10:52 AM

#28

redrotorR1

LS6 Convert

Joined: Jan 2002

Posts: 1,827

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From: Austin, TX

Sure. For a net loss of 0.0000005 lbs.

Aug 7, 2003 | 03:58 PM

#29

adam c

Cheap Bastard

iTrader: (2)

Joined: Sep 2002

Posts: 8,370

Likes: 50

From: San Luis Obispo, Ca

Quote:

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.