Autocross Classing

[Mark Lasota]

So you go to the Autocross registration table and they ask you what class you are running in. You are tempted to say that you only go 1st class, but are considering just giving them a dumb look instead. Neither one really helps the people working registration.
We use a modified version of PCA autocross classing for medium sized regions. Have a look below, find your car, find your class, and impress the people at registration with your knowledge.


S - Showroom Stock:
As delivered, no modifications. Adjustments OK if nothing modified. Street tires with treadwear ratings > 140. Wear and tear replacements must be OEM equivalents. Spare tire & tools remain in car. (This class category is only for the relatively recent cars shown).

S1
911 Carrera 2 (964:1990-1994), Carrera 4 (964:1989-1994);
RS America (1993-1994);
911 Carrera (993:1995-1998);
Cayenne (9PA:2003-On), All

S2
Boxster (986:1997-2004); Boxster (987:2005-On);
Cayman (2006-On)

S3
Boxster S (986:2000-2004); Boxster S (987:2005-On);
Cayman S (2006-On)

S4
911 Carrera (996:1999-2005); 911 Carrera (997:2005-On);
911 Turbo (965/993/996/997:1991-On);
GT2/GT3 (996/997: 2002-On);
Carrera GT (980:2004-On)


P - Production:
Many modifications allowed, some are quite significant including DOT "R" compound tires. Most cars fit in here. (See PCR section A-2.5.5)

P1
356, All; 912/912E, All; 914/4, All; 924, All

P2
924S 2.5, All; 924 Turbo (931), All;
944, All; 944S, All; 944 Turbo (951), All; 944S2, All;
968, All; 928, All

P3
911 (1965-1969), All; 914/6, All; 911 (1970-1977), All; 911SC (1978-1983), All

P4
911 Carrera 3.2 (1984-1989), All; 911 Speedster (1989);
911 Carrera 2 (964:1990-1994) and Carrera 4 (964:1989-1994), All;
American Roadster, All; RS America (1993-1994);
911 Carrera, Carrera S, C4S (993), All

P5
911 Carrera (996:1999-2005); 911 Carrera (997:2005-On)

P6
911 Turbo (1976-On), All; GT2/GT3 (996/997: 2002-On)

P7
Boxster (986:1997-2004)

P8
Boxster S (986:1997-2004); Boxster (987:2005-On), Boxster S (987:2005-On)
Cayman (2006-On), Cayman S (2006-On)

I - Improved:
Modifications beyond those allowed in Production. (PCR A-2.5.6)

I1
Improved Automobiles
All 4 Cylinder, up to 1999cc, 1800 pounds minimum;
All 4 Cylinder, 2000cc up to 2699cc, 2500 pounds minimum;
All 4 Cylinder, 2700cc and above and All 6 Cylinder, up to 2399cc, 2200 pounds minimum

I2
Improved Automobiles
All 6 Cylinder and above, 2400cc up to 3199cc, 2150 pounds minimum;
All 6 Cylinder and above, 3200cc and above; 2700 pounds minimum;
All Turbo/Supercharged 4 Cylinder; 2150 pounds minimum;
All Turbo/Supercharged 6 cylinder and above; 2500 pounds minimum

M - Modified:
Modifications beyond those allowed in previous categories (PCR A-2.5.7)

M1
Modified Automobiles
All 4 Cylinder, up to 1999cc;
All 4 Cylinder, 2000cc up to 2699cc;
All 4 Cylinder, 2700cc and above; All 6 Cylinder, up to 2399cc

M2
Modified Automobiles
All 6 Cylinder and above, 2400cc up to 3199cc;
All Turbo/Supercharged 4 Cylinder; All 6 Cylinder and above, 3200cc and above;
All Turbo/Supercharged 6 cylinder and above


. Ladies may choose to run in S-L, P-L, I-L, or M-L if desired
. I1 and I2 may be combined. The same is true for M1 and M2
. Classes with only 1 car may be bumped to the next class, based on PCR classing