Autocross PAX Factors
What is this PAX thing anyway?
The PAX factor attempts to equalize the field by assigning a time penalty for each run. The time penalty is based on the car's potential performance. Developed by Rick Ruth, the PAX factor system is in wide use across the country.
CMC maintains some additional PAX factors for Karts.
2011 PAX Factors
| Stock | Factor | Street Prepared | Factor | Street Touring | Factor |
|---|
| SS | 0.857 | ASP | 0.862 | ST | 0.820 |
| AS | 0.841 | BSP | 0.859 | STS | 0.823 |
| BS | 0.839 | CSP | 0.858 | STX | 0.824 |
| CS | 0.833 | DSP | 0.844 | STR | 0.836 |
| DS | 0.817 | ESP | 0.846 | STU | 0.838 |
| ES | 0.825 | FSP | 0.835 | SM | 0.869 |
| FS | 0.827 | | SMF | 0.855 |
| GS | 0.809 | | SSM | 0.875 |
| HS | 0.791 |
| Prepared | Factor | Modified | Factor | Other | Factor |
|---|
| XP | 0.887 | AM | 1.000 | FSAE | 0.981 |
| BP | 0.870 | BM | 0.958 | F125 | 0.952 |
| CP | 0.860 | CM | 0.906 | FJA | 0.866 |
| DP | 0.867 | DM | 0.905 | FJB | 0.826 |
| EP | 0.863 | EM | 0.910 | FJC | 0.755 |
| FP | 0.872 | FM | 0.904 | |
| GP | 0.837 |
| Kart Class | Factor |
|---|
| FJA, FJ4 | 0.866 |
| FJB, FJ3 | 0.826 |
| FJ2 | 0.800 |
| FJC, FJ1 | 0.755 |
CMC only PAX numbers for FSx classes.
Note: These numbers are only used for placing in combined FS
x classes and are
NOT eligible for ANY CMC PAX awards.
| Class | Factor |
|---|
| FS2 | 0.800 |
| FS3 | 0.826 |
| FS4 | 0.866 |
| FSS | 0.930 |