Autocross Tire Pressures, books
08-04-2010, 10:30 AM
#1
Registered User
Thread Starter
Join Date: Jun 2009
Location: Frankfort, KY
Posts: 4,340
Likes: 0
Received 0 Likes
on
0 Posts
Autocross Tire Pressures, books
I just got this in the mail-
http://www.longacreracing.com/catalog/item...id=1168&catid=8
I'm looking for recommendations on autocross books that talk about driving tips and car set up info. Also looking for some really good articles on how determine the optimum tire pressure for my car set-up.
Thanks in advance for the help
-josh
http://www.longacreracing.com/catalog/item...id=1168&catid=8
I'm looking for recommendations on autocross books that talk about driving tips and car set up info. Also looking for some really good articles on how determine the optimum tire pressure for my car set-up.
Thanks in advance for the help
-josh
08-04-2010, 10:36 AM
#2
08-04-2010, 10:44 AM
#3
Steve Hui (maintainer of the S2kI autocross FAQ) described an excellent method for determining the best tire pressures:
Start with some reasonable guess.
Take a run or two.
Raise or lower the pressure in the front tires.
Take a run or two.
How did the handling balance change?
If it understeered more, then your change was in the wrong direction. Try going the other way.
If it oversteered more, then you should keep going until you stop increasing the oversteer.
Do the same thing for the rear tires, except that oversteer=bad and understeer=keep going.
Start with some reasonable guess.
Take a run or two.
Raise or lower the pressure in the front tires.
Take a run or two.
How did the handling balance change?
If it understeered more, then your change was in the wrong direction. Try going the other way.
If it oversteered more, then you should keep going until you stop increasing the oversteer.
Do the same thing for the rear tires, except that oversteer=bad and understeer=keep going.
08-04-2010, 11:14 AM
#4
Registered User
Thread Starter
Join Date: Jun 2009
Location: Frankfort, KY
Posts: 4,340
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Orthonormal,Aug 4 2010, 01:36 PM
How to Autocross by Andy Howe
-Winning Autocross Techniques (Speed Secrets)
-Autocross Logbook
-How to Autocross (Sadesign)
-Secrets of Solo Racing: Expert Techniques for Autocrossing and Time Trials (got this one for $1.92
)-Autocross Performance Handbook (Motorbooks Workshop)"
all for $58 shipped
08-04-2010, 05:16 PM
#6
Originally Posted by PedalFaster,Aug 4 2010, 06:26 PM
$180 tire gauge?!? 
Trending Topics
08-05-2010, 05:51 AM
#9
One thing I don't do any more is use a pyrometer. The last time I used it, it showed the center of the tire as being cooler than the edges even after adding over 10psi to the tires and slowing down my times about 2 seconds!
I assume you know about the chalk marking trick to get you in the ballpark.
I assume you know about the chalk marking trick to get you in the ballpark.
08-05-2010, 06:09 AM
#10
Registered User
Thread Starter
Join Date: Jun 2009
Location: Frankfort, KY
Posts: 4,340
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Orthonormal,Aug 5 2010, 08:51 AM
One thing I don't do any more is use a pyrometer. The last time I used it, it showed the center of the tire as being cooler than the edges even after adding over 10psi to the tires and slowing down my times about 2 seconds!
I assume you know about the chalk marking trick to get you in the ballpark.
I assume you know about the chalk marking trick to get you in the ballpark.