Autocross
Autocross: Dave Dabell, Autocross Chair
Last month’s introduction explained that there are different categories based on what modifications have been performed on the car. Each category is broken down into classes determined by the capability of individual cars.
This month we will focus further on what modificationare allowed in each of the categories. There are 50 pages in the SCCA rule book devoted to this, so I’ve distilled it down into major items:
STOCK (S) Any DOT legal tires Aftermarket wheels in stock size Cat back exhaust Different air cleaner element Any make of shock absorber
STREET TOURING (ST) Any size DOT tire with minimum treadwear rating of 140 Any wheels with maximum width determined by class Springs, shocks, sway bars Suspension bushings Camber plates Engine intake system prior to throttlebody or intake manifold Exhaust headers & cat back exhaust ECU reprogramming Seats
STREET PREPARED (SP) Any size wheels & DOT tires Springs, shocks, sway bars Suspension bushings Camber plates Upper OR Lower control arms (not both)Intake system and manifold Upgraded intercoolers Exhaust headers & cat back exhaust ECU reprogramming Limited slip Seats
STREET MODIFIED (SM) Anything allowed inStock, Street Touring, or Street Prepared Any suspension with stock mounting points Engine block must be available as stock or option in car Otherwise, unrestricted engine and drivetrain Keep in mind there are lots of additional details in the SCCA rules that you probably will want to check if you are headed to an officially sanctioned SCCA event.
Autocross Update
We are now planning to have our April event at Keene School in Glasgow. With that in mind, we have moved the date for April a week later so that it can be run on Sunday. Note the revised schedule below:
Sunday, April 22 - Glasgow
Saturday, June 23 - Glasgow
Saturday, August 11 - GlasgowSunday, October 13 - TBD
Last month’s introduction explained that there are different categories based on what modifications have been performed on the car. Each category is broken down into classes determined by the capability of individual cars.
This month we will focus further on what modificationare allowed in each of the categories. There are 50 pages in the SCCA rule book devoted to this, so I’ve distilled it down into major items:
STOCK (S) Any DOT legal tires Aftermarket wheels in stock size Cat back exhaust Different air cleaner element Any make of shock absorber
STREET TOURING (ST) Any size DOT tire with minimum treadwear rating of 140 Any wheels with maximum width determined by class Springs, shocks, sway bars Suspension bushings Camber plates Engine intake system prior to throttlebody or intake manifold Exhaust headers & cat back exhaust ECU reprogramming Seats
STREET PREPARED (SP) Any size wheels & DOT tires Springs, shocks, sway bars Suspension bushings Camber plates Upper OR Lower control arms (not both)Intake system and manifold Upgraded intercoolers Exhaust headers & cat back exhaust ECU reprogramming Limited slip Seats
STREET MODIFIED (SM) Anything allowed inStock, Street Touring, or Street Prepared Any suspension with stock mounting points Engine block must be available as stock or option in car Otherwise, unrestricted engine and drivetrain Keep in mind there are lots of additional details in the SCCA rules that you probably will want to check if you are headed to an officially sanctioned SCCA event.