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Updated 1/30/2001
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2001 PAX Index
Street Touring PAXes |
The SFR Handicap Index ("PAX")
The PAX Index is a system of handicapping cars, so
that drivers in different SCCA classes may compare times against each other.
John Kelly tells us it was invented by Jim McKamey for a series of autocrosses
he ran at one time, and is now updated each year by Dave Beck.
The PAX index for the fastest class (AM) is always 1.0. For any other
class, multiply your time by the index for your class to get the time you
theoretically would have run in an AM car.
PAX numbers are compiled primarily from the results of a series of midwestern
events, though some attention is paid to the Solo II nationals.
2001 SFR Handicap Index
San Francisco Region uses the straight PAX index, with the addition of
an entry for OSP (which is not a national class and therefore does not
have a PAX index). We index OSP at .855 for people running in Novice and
Street Tire classes, for example.
| Modified |
Prepared |
Street Prepared |
Stock |
| -- |
|
-- |
|
OSP |
.855 |
SS |
.830 |
| AM |
1.000 |
AP |
.874 |
ASP |
.852 |
AS |
.817 |
| BM |
.955 |
BP |
.872 |
BSP |
.847 |
BS |
.813 |
| CM |
.924 |
CP |
.856 |
CSP |
.844 |
CS |
.804 |
| DM |
.900 |
DP |
.853 |
DSP |
.819 |
DS |
.796 |
| EM |
.907 |
EP |
.873 |
ESP |
.822 |
ES |
.786 |
| FM |
.904 |
FP |
.865 |
FSP |
.815 |
FS |
.807 |
| |
|
|
|
|
|
GS |
.789 |
| F125 |
.946 |
SM |
.842 |
STR |
.809 |
HS |
.781 |
Street Touring PAXes
When Street Touring runs in Street Tire or Novice classes,
it is handicapped using the STR index. Why? Because
it is compared against cars in CSP, for example, whose index is
also calculated using results of cars running R tires.
For your reference, the national PAX index for STS is 0.782.
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