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updated 4/29/08



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Don Slevin, Pres.  845-510-4110   dslevin@fyscomputers.com

 

PAX INDEX

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.

"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 RackŪ 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.

Rick Ruth PAX/RTP Administrator

Index archives
PAX/RTP 2008, 2007, 2006, 2005, 2004, 2003, 2002
PAX 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994
RTP 2001, 2000, 1999, 1998, 1997, 1996, 1995

Past Nationals results
PAX/RTP 2007, 2002
PAX 2001, 2000, 1999, 1998, 1997, 1996, 1995
RTP 2001, 2000, 1999, 1998, 1997, 1996, 1995

Past National Tour results
2007 Dixie, San Diego, Atwater, Walnut Ridge, Houston, Huntsville, Peru, Milwaukee, Packwood
2006 Ft. Myers, San Diego, Walnut Ridge, Houston, Atwater, Peru, Devens, Milwaukee, Denver, Packwood
2005 El Paso, San Diego, Houston, Walnut Ridge, Atlanta, Atwater, Toledo, Peru, Devens, Packwood, Denver
2004 Toledo, Peru, Bremerton

 

 

SCCA Forums Pax Discussion Forum

2008 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.852
AS 0.842
BS 0.832
CS 0.831
DS 0.812
ES 0.817
FS 0.821
GS  0.815
HS 0.792
ASP 0.862
BSP 0.858
CSP 0.856
DSP 0.843
ESP 0.841
FSP 0.833
XP 0.882
BP 0.866
CP 0.864
DP  0.863
EP 0.861
FP 0.872
GP 0.847
AM 1.000
BM 0.937
CM 0.904
DM 0.890
EM 0.887
FM 0.895
 
FSAE 0.946
F125 0.948
FJA 0.855
FJB 0.828
FJC 0.770
STS 0.816
STS2 0.818

STX 0.820
STU 0.830

SM 0.860
SM2 0.867

 

2007 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.848
AS 0.838
BS 0.828
CS 0.822
DS 0.804
ES 0.812
FS 0.809
GS  0.803
HS 0.789
ASP 0.858
BSP 0.853
CSP 0.845
DSP 0.836
ESP 0.834
FSP 0.823
XP 0.874
BP 0.866
CP 0.864
DP  0.860
EP 0.863
FP 0.868
GP 0.847
AM 1.000
BM 0.944
CM 0.909
DM 0.889
EM 0.879
FM 0.890

F125 0.946
FJR1 0.790
FJ2 0.800
FJ3 0.833
FJ4 0.851
STS 0.805
STS2 0.806

STX 0.808
STU 0.821

SM 0.856
SM2 0.862

 

2006 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.840
AS 0.831
BS 0.822
CS 0.813
DS 0.798
ES 0.806
FS 0.805
GS  0.794
HS 0.780
ASP 0.852
BSP 0.843
CSP 0.838
DSP 0.829
ESP 0.828
FSP 0.814
AP 0.868
BP 0.862
CP 0.856
DP  0.853
EP 0.858
FP 0.863
GP 0.844
AM 1.000
BM 0.944
CM 0.909
DM 0.885
EM 0.881
FM 0.948

F125 0.937
FJR1 0.781
FJ2 0.796
FJ3 0.830
FJ4 0.837
STS 0.797
STS2 0.802

STX 0.803 to .804
STU 0.820

SM 0.845
SM2 0.854

 

2005 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.837
AS 0.828
BS 0.821
CS 0.810
DS 0.796
ES 0.806
FS 0.805
GS 0.782
HS 0.777
ASP 0.850
BSP 0.839
CSP 0.838
DSP 0.822
ESP 0.826
FSP 0.811
AP 0.865
BP 0.861
CP 0.855
DP 0.844
EP 0.858
FP 0.862
AM 1.000
BM 0.942
CM 0.908
DM 0.879
EM 0.886
FM 0.884

F125 0.939 FSAE 0.948
FJR1 0.781
FJ2 0.797
FJ3 0.823
FJ4 0.832
STS 0.799
STS2 0.803

STX 0.802
STU 0.818

SM 0.842
SM2 0.852

 

2004 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.836
AS 0.828
BS 0.826
CS 0.811
DS 0.794
ES 0.804
FS 0.803
GS 0.781
HS 0.776		 ASP 0.848
BSP 0.839
CSP 0.837
DSP 0.819
ESP 0.824
FSP 0.813		 AP 0.868
BP 0.863
CP 0.854
DP 0.844
EP 0.861
FP 0.862 		AM 1.000
BM 0.945
CM 0.913
DM 0.886
EM 0.894
FM 0.889
F125 0.938 FSAE 0.960
FJR1 0.775 		STS 0.791
STX 0.795
SM 0.838
SM2 0.849

 

2003 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.837
AS 0.828
BS 0.825
CS 0.814
DS 0.795
ES 0.804
FS 0.806
GS 0.782
HS 0.778		 ASP 0.846
BSP 0.840
CSP 0.839
DSP 0.818
ESP 0.826
FSP 0.815		 AP 0.871
BP 0.865
CP 0.853
DP 0.845
EP 0.863
FP 0.861 		AM 1.000
BM 0.946
CM 0.916
DM 0.891
EM 0.899
FM 0.894
F125 0.938
FJR 0.820		 STS 0.784
STX 0.798
SM 0.834
SM2 0.851
 
2002 Pax Index
Stock Street Prepared Prepared Modified Misc
SS 0.836
AS 0.828
BS 0.827
CS 0.812
DS 0.798
ES 0.802
FS 0.809
GS 0.785
HS 0.779		 ASP 0.846
BSP 0.840
CSP 0.842
DSP 0.820
ESP 0.826
FSP 0.817 		AP 0.874
BP 0.867
CP 0.854
DP 0.849
EP 0.868
FP 0.865 		AM 1.000
BM 0.951
CM 0.919
DM 0.894
EM 0.904
FM 0.897
F125 0.932
FJR 0.815		 STS 0.784
STX 0.801
SM 0.834
SM2 0.856		 


 



  

  

    

      
      2001 Pax Index
    

    

      Stock
      Street Prepared
      Prepared
      Modified
      Misc
    

    

      SS    .830

      AS    .817

      BS    .813

      CS    .804

      DS    .796

      ES    .786

      FS    .807

      GS    .789

      HS    .781		
      ASP    .852

      BSP    .847

      CSP    .844

      DSP    .819

      ESP    .822

      FSP    .815		
      AP    .874

      BP    .872

      CP    .856

      DP    .853

      EP    .873

      FP    .865		
      AM    1.000

      BM    .955

      CM    .924

      DM    .900

      EM    .907

      FM    .904

 		
      F125    .946

      

      STS    .782

      STR    .809

      SM    .842

 		
    

  

  






 



  

  

    

      
      2000 Pax Index
    

    

      Stock
      Street Prepared
      Prepared
      Modified
      Misc
    

    

      SS .830

      AS .815

      BS .812

      CS .804

      DS .799

      ES .786

      FS .807

      GS .789

      HS .781		
      ASP .852

      BSP .847

      CSP .844

      DSP .819

      ESP .822

      FSP .817		
      AP .872

      BP .874

      CP .857

      DP .853

      EP .873

      FP .865		
      AM 1.000

      BM .955

      CM .924

      DM .900

      EM .908

      FM .904		
      F125 .948

      STS .783

      STR .810

      SM .846		
    

  

  




 



  

  

    

      
      1999 Pax Index
    

    

      Stock
      Street Prepared
      Prepared
      Modified
      Misc
    

    

      SS .830

      AS .815

      BS .812

      CS .804

      DS .799

      ES .786

      FS .807

      GS .789

      HS .781		
      ASP .852

      BSP .847

      CSP .844

      DSP .819

      ESP .822

      FSP .817		
      AP .872

      BP .874

      CP .857

      DP .853

      EP .873

      FP .865		
      AM 1.000

      BM .955

      CM .924

      DM .900

      EM .908

      FM .904		
      F125 .948

      STS .783

      STR .810

      SM .846