 Autocross tire pressures, Going to my first autocross on Saturday |
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| ken914 |
 May 19 2005, 01:33 PM
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Whole lot 'O 914/6  Group: Members Posts: 157 Joined: 15-November 04 From: Mount Pleasant, SC Member No.: 3,122  |
I am going to run my 914/6 in my first autocross this saturday. Everyone in racing seems obsessed with tire pressures. I have no idea where I should set them or if they should be set hot or cold.
Can anyone please explain the pressure obsession to me so that I can be equally neurotic. Thanks! |
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| J P Stein |
May 19 2005, 08:44 PM
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
There is an ideal pressure for max grip from every tire/car combo. Deviating pressure up or down from that ideal will lessen grip.
Finding that ideal is a bitch. You can't go by lap times as lap times will drop for each run (baring a screwup)....particularly those by novice. It is done by a combination of tire temps, pressure rises, wear pattern, and feel.....or ask somebody that's running the same combo...if he's fast (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) For tires the size of those concerned, I would go with your normal street pressures plus maybe a couple more pounds and forget about it. You're right, they prolly are too big to ever get any heat in em'....even if that would do em' any good. Do take a pressure gauge along and, after a couple runs, check for pressure rise and return to the original settings if required. You'll find with a 3.2L 914 that big stickey tires are required for AX.....prolly something larger than 225s/205. There are 3 good Dot R, AX tires. Hoosier A3s, Kuhmo Victor racers(for the budget minded) and Kuhmo 710s all the rest are pretenders....just my opinion. |
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Posts in this topic
ken914 Autocross tire pressures May 19 2005, 01:33 PM
jdogg What are you running for tires? My Kumho Victorace... May 19 2005, 01:51 PM xsboost90 now i havent experienced much w/ the teener yet, b... May 19 2005, 01:52 PM Joe Ricard Dude what kina tiars?
What size a Tiar
How wide t... May 19 2005, 01:55 PM anthony Ken, I'm going to assume you are talking about... May 19 2005, 01:59 PM jdogg I see you are in Mount Pleasant, SC. I am geograp... May 19 2005, 01:59 PM Dave-O I'll ask the same question people asked me a y... May 19 2005, 02:02 PM ken914 Thanks for all the input.
The car is a /6 with a... May 19 2005, 02:42 PM URY914 Just for a point of referance,
I run 16 pounds in... May 19 2005, 03:14 PM messix nothing beats tuning tire pressures with a infared... May 19 2005, 06:01 PM messix p.s - use lap times as a refence not the way it fe... May 19 2005, 06:06 PM SirAndy May 19 2005, 06:09 PM xsboost90 you said your running 285 40 15's, any idea wh... May 19 2005, 06:22 PM SirAndy May 19 2005, 06:47 PM nebreitling my 02:
for your first AX, set the pressures where... May 19 2005, 11:56 PM
sean_v8_914 Falken Azenis 205 50 15. I start at 25 psi cold. a... May 20 2005, 01:59 AM |
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