Autocross Car Class Index
This is the Trillium autocross car class index (with PAX factor values)
The BMWCC Trillium autocross scoring model is based on the SCCA SOLO II PAX/RTP "Racers Theoretical Performance" Index. The system is an attempt to neutralize the car factor; it emphasizes the driver and his or her ability, no matter the vehicle driven.
The PAX/RTP index reflects analysis of results from over 200 U.S. Solo II events including, the Solo II National Championships, National Tour, regional and division events, from 1995 to present. It is continuously monitored and updated on an annual (if not more frequent) basis.
A proficient driver in a Formula 1 car (class AM, factor 1.000) could turn a particular time of say 40 seconds. Then take about 52 seconds in his stock '93 BMW 318i (class HS, factor 0.780) daily driver. His factored time are computed as follows:
F1: 1.000 x 40s = 40.00s
318i: 0.780 x 52s = 40.56s
In other words, he turns about the same (factored) time, no matter which car he drives.
| stock | ||
| AS | 0.831 | new M Coupé & Roadster; E46 M3; Z4; etc. |
| BS | 0.822 | E30 M3; E36 M3; Z3 6cyl; etc. |
| CS | 0.813 | MR2 supercharged; new Miata 1.8 |
| DS | 0.798 | 330; 3 series, 6-cyl |
| ES | 0.806 | Z3, 4-cyl; Porsche 924 Turbo |
| FS | 0.805 | big bimmers; old M5s, etc. |
| GS | 0.794 | 318is; 318ti ('95+); 325e; 2002; MINI Cooper S; etc. |
| HS | 0.780 | 318; 320; 7 series; MINI Cooper; etc. |
Note: The BMW M3 Lightweight, MINI Works (pre-06 dealer installed), BMW Z8, among others, are not eligible for stock class.
| street prepared | ||
| ASP | 0.852 | M Coupé; Roadster; E46 M3; etc. |
| BSP | 0.843 | E36 M3; Z8; etc. |
| CSP | 0.838 | Z3 4-cyl; E30 M3; etc. |
| DSP | 0.829 | various 3 series; 318ti; etc. |
| ESP | 0.828 | 5, 6, and 7 series; MINI Cooper S; etc. |
| FSP | 0.814 | 2002; 320i; MINI Cooper; etc. |
| super stock | ||
| SS | 0.840 | Porsche 996 and 997; Viper; Elise; etc. |
| street modified | ||
| SM | 0.842 | 4 doors |
| SM2 | 0.852 | 2 doors |
| street touring | |
| STS | 0.797 |
| STS2 | 0.802 |
| STX | 0.804 |
| STU | 0.820 |
| prepared (race) | ||
| XP | 0.868 | replaces AP |
| AP | 0.865 | discontinued |
| BP | 0.862 | |
| CP | 0.856 | |
| DP | 0.853 | |
| EP | 0.858 | |
| FP | 0.863 | |
| GP | 0.844 | new for 2006 |
| Formula junior | |
| F125 | 0.937 |
| FJ1 | 0.781 |
| FJ2 | 0.796 |
| FJ3 (FJB) | 0.830 |
| FJ4 (FJA) | 0.837 |
| modified (race) | |
| AM | 1.000 |
| BM | 0.944 |
| CM | 0.909 |
| DM | 0.885 |
| EM | 0.881 |
| FM | 0.887 |
| FSAE | 0.948 |
See the
to determine final class of car given its preparation and modifications.