Stock class is for unmodified street vehicles. The rules allow you to use certain aftermarket parts for wearable items. Replacement shocks, brake pads, plugs/wires and air filters are 'free'. Any wheel can be used as long as it's the same diameter and width as stock and has the stock offset within +/- .25 inch. You may replace the front sway bar and use a cat back exhaust. You may not use a chip, headers, cone type air filter or cut/replace/lower your suspension springs.
Street Prepared class uses the Stock rules and allows further modifications. Aftermarket clutches, computer chips, cone filters, lowered springs, fender flares, strut bars, any wheel size, camber plates, torque arms, panhard bars, headers, LSD's, and underdrive pulleys are all allowed. You may not overbore the motor past .0472 inch, use an alternate cam or turbocharger.
Prepared class cars are usually older SCCA road racing machines. They have weight, carburator and wheel size restrictions, require roll bars and are generally not street legal, (consult the rulebook for more info). Unfortunately, otherwise Stock class cars with aftermarket cams must run here to be legal, (or go to one of the Street Mod classes)
Modified class class cars are usually purpose built racing machines. Cars with alternate motors, turbochargers, big wings, open wheel formula cars and college SAE cars fall into this category.
After you decide which class and category your car falls into we need to think about tires. Racing slicks automatically put you in Prepared or Modified while DOT approved R series tires, such as the Kumho V700, Toyo RA1, Yokohama 032R or Hoosier A3S03, are legal in Stock or Street Prepared. If you are using street tires, from high performance summer tires to good old-fashioned snow tires, I'd recommend running in one of the indexed Street Tire classes. We separate them into FWD, (which includes AWD) and RWD and use the RTP index (a handicapping system for comparing times of cars that are not in the same class). Note the BFG G-Force KD is a street tire while the BFG G-Force R1 is not. We're done right? Well not so fast…
You'd put your assigned car number and then the class letters after it, such as…
AS = A Stock, open class (DOT R tires)
ASL = A Stock Ladies
ASP = A Street Prepared
F = FWD & AWD street tire, write your complete class/category on your tech card but only put the F after your number on the car
R = RWD street tire, write your complete lass/category on your tech card but only put the R after your number on the car
STS = Street Touring
STX = Street Touring, larger motors
SM = Street Modified
So, a typical scenario for a new person showing up with their stock street tired H-Stock Honda Civic starts with an F for FWD street tire on their car. If they start using DOT R series tires like a Kumho V700 then they move to the open class and would use HS instead. If they have done car modifications they'd be in TS, SM or CSP.
After registration, it's off to Tech Inspection which can be found near the grid area. The Tech folks try to make sure your car is autocross worthy. They'll check your wheel bearings, brakes/fluid, battery security, etc. It's a basic safety check, we don't have time to tear each car apart. They'll make sure your helmet has a Snell M90 or better rating. They'll check to see if you're car number/class is legible. They'll also check for loose items in the car that might become projectiles while out on course so clean it out the night before. If Tech declares a car unsafe, it will not be able to run and the driver's entry fee will be refunded. Tech will put a sticker on your car and your helmet. It is the driver's responsibility to make sure they have their car ready. If you do not have both a helmet and car sticker, you cannot run, they will be checking for them at the starting line.
Everyone has to have a worker assignment. If you do not work you will be DNF'ed for the day. There are a variety of assignments to choose from such as corner working, grid, and timing and scoring. For those who like to arrive early, we can usually use help with set-up and registration. At the end of the day we need help stacking cones and loading up the bus. You are required to work in the heats that you do not run. If you drive in Heat 1 and 3, then you work in Heat 2 and 4. If there are enough participants at the event, (150+) we will only have to work in one Heat. If there are any changes, we will make announcements on the P.A. or at the drivers meeting. The P.A. is transmitted on FM radio at 88.5. This way you can listen to the times in your car. Be sure to pay attention to your driving when exiting the course and returning to the grid after your run. Safety first!
Grid and Run Order
After Tech it's time to put your car in the Grid. Grid will be split in half with heat 1 and 3 cars located on one side and heat 2 and 4 cars in the other side. The grid spots are numbered. Near registration there is a sign posted indicating which grid spot you are assigned to. It will also say which classes are on what side of the grid, and the heat that each class will run. The first couple of grid spaces are for two driver cars. Walk over to grid and find you number, then go get your car and park it in your grid spot. This saves us from having any traffic jams near grid. It may seem to take some extra time but it makes life in the timing vehicle a lot easier during the event.
The course is setup each morning and is different from event to event. There may or may not be a course map available. It is very important that you memorize the course so you know where you're going. Walk the course at least three times. Look for the laydown or pointer cones. Those will mark the insides of the turns, we'll be turning around them. For more course info go here. While it may look like a miniture road course most Stock class cars will never go over 65 mph and we rarely use 3rd gear (put it in 2nd at the start and then leave it there!). We also have a instructor course walk at approx 9:15 so you can have someone experienced to walk along with and ask questions.
Last edited by creepingdeath; 09-01-2003 at 04:25 PM.