PAX or INDEX numbers

[RandyC]

"Racers Theoretical Performance"




This Index was developed by Rick Ruth and reflects study of results from over 200 nationwide Solo II events including, the Tire Rack® Solo II National Championships, National Tour, Chicago Region, Houston Region, Milwaukee Region, New England Region, Northern New Jersey Region, Philadelphia Region, Southeast Divisional Series, San Francisco Region, San Diego Region, South Jersey Region, Subaru CenDiv Series, Tri-State Sports Car Council, Texas Region, Wisconsin Autocrossers Inc., and several others.



http://www.scca-chicago.com/solo/indexes/rtp2006.html

[RandyC]

http://www.autox4u.com/pax_files/image001.gif<!--[endif]-->


Written By Tony "Mario" Crea





PAX could best be described as a relative index of performance in autocrossing, much the same way a handicap rating is given in the game of golf. PAX indexes are based on results from the SCCA National Championships (the best of the best) each September. How strongly a class performs compared to the thirty-something other classes represented helps determine PAX indexes the next year. The following is an example showing how PAX is used at events...

The class "A Modified" is the fastest class in autocrossing; it is expected that the cars in this class represent the pinnacle of autocross-specific race car design, engineering, and performance. The class rarely disappoints! Due to its unbelievable performance the PAX index for this class is 1.000 (no handicap is given). This means that if an A Mod car runs a time of 50 seconds, it will show up on the final results as 50 seconds.
Now let's compare this to a car in "C Street Prepared", which has a PAX index of .844. A car in CSP runs a time of 62 seconds on the same course as the A Mod car, yet its time will appear as 52.328 on the final standings. This was done by multiplying the raw time by the PAX index. As a result, the CSP car finishes only 2.328 seconds (not 12 seconds) behind the A Mod car. Yes, it still lost based on raw speed alone, but it allowed the driver in the CSP car to finish much higher overall. Thus, most regions base their overall driver championship on PAX performance whereas class championships are based on raw times

http://www.autox4u.com/pax.htm

[RandyC]

Changes from 2005 to 2006. Zero means the PAX stayed the same. A positive number is how harder the PAX is for that class.

SS 0.003
AS 0.003
BS 0.001
CS 0.003
DS 0.002
ES 0
FS 0
GS 0.013
HS 0.003
ASP 0.002
BSP 0.004
CSP 0
DSP 0.004
ESP 0.002
FSP 0.003
STS -0.002
STS2 -0.001
STX 0.001
STU 0.002
SM 0.003
SM2 0.002
AP 0.003
BP 0.001
CP 0.001
DP 0.007
EP 0
FP 0.001
AM 0
BM 0.002
CM 0.001
DM 0.006
EM -0.005
FM 0.003
FSAE 0
F125 -0.002
FJ1 0
FJ2 -0.001
FJ3 0.007
FJ4 0.005

[mcontour]

Yeh!! Karts went down!!

[woodrufj]

Changes from 2005 to 2006. Zero means the PAX stayed the same. A positive number is now harder the PAX is for that class.

Keep in mind this is only relative to AMod. There is a normalized bias of +.002. So if your PAX is +.002, you really stayed even against the average of classes. If you're +.001 or less (negitives) your PAX got relativly easier. If you're +.003 or more your PAX got relativly harder.

Jay W
505/287 Dakota

[frosty]

Keep in mind this is only relative to AMod. There is a normalized bias of +.002. So if your PAX is +.002, you really stayed even against the average of classes. If you're +.001 or less (negitives) your PAX got relativly easier. If you're +.003 or more your PAX got relativly harder.

Jay W
505/287 Dakota

I'm so confused that I'll just focus on fixing that nut (you know, behind the wheel).