As we have had few events to report on, our articles have been advice based, and this one will continue in that theme. The last few articles introduced you to the world of autocrossing and told you what was involved. Now we are going to tell you how to win. I have copied this article from a source, From the February, 2009 issue of Euro Tuner By Philip Royle. This is a very concise and informative article and I could not have done any better than Philip, so I defer to his knowledge and experience and thank him for his advice and encouragement.
Many say consistency is the key to being a good racer, but consistency means nothing if your technique is wrong to begin with. Fortunately, technique is something that can be learned, so if you get out on the autocross course and run the slowest time, do not give up. Instead, learn from your mistakes and alter your driving style.
Being smooth at the controls is the key to running fast. In order to be smooth, you must have the correct seating position, foot position, steering wheel grip, and a good mental map of the line you are planning on running through the cones. Each of these items must be understood and perfected before you will be able to run fast consistent lap times. Fortunately, seating and foot positioning will be the same on all autocross courses, so once you have perfected those, all you will need to worry about is running the correct line.
In The Cockpit
Before you can improve your driving techniques, however, you must be seated correctly and know how to brake efficiently. One of the most common errors beginners make is driving like actors on television. Rather than reclining the chair and grabbing the top of the wheel with the left hand and placing the right hand firmly on the shifter, the correct racing position is to be seated fairly close to the steering wheel with your hand on the shifter only while shifting.
Seat yourself close to the steering wheel, so you can turn the wheel either direction without fully extending your arms (But not too close, so your arms would not hit your body during tight turns). Your hands should be positioned loosely at each side of the wheel, in the nine and three o’clock positions. Do not clench the wheel, as your hands and arms will become fatigued. When you shift, do not grab the shifter or slam it into gear. Instead, use the palm of your hand or your fingertips to smoothly slide the gear lever into the next gear, returning your hand back to the steering wheel when the shift is complete.
Heel-and-toe braking is difficult, but fortunately, there are few shifts on an autocross course, making this almost a moot point. But as the gains of heel-and-toe braking are tremendous both on and off the track, we believe everyone should at least practice. Heel-and-toe braking is when the driver manipulates the throttle and the brake at the same time with the right foot. The idea is that when entering a turn and downshifting at the same time, the engine revs must be matched or else the driving wheels will lock up and lose traction. Heel-and-toe braking allows the driver to brake, shift, and set up for the turn, all without the worry of locking up the tires or offsetting the vehicle’s balance.
There is no established method of positioning the right foot for heel- and-toe braking, but the most common method is placing the toes on the brake and rocking the right side of the foot onto the throttle (Heel-and-toe braking is misleading, as most people do not use their heel on the brake or the throttle.) While the brake is being applied, the clutch is depressed and the vehicle is downshifted. At the same time, the throttle is pressed for an instant to raise the engine revs, and at that point the clutch is released. With practice, the downshift will be seamless and the vehicles weight distribution will not be offset during the shift. If too little throttle is applied, the nose of the vehicle will dive once the clutch is released, causing an oversteer situation or, in the case of the front wheels locking, an under steer situation. If too much throttle is applied, the vehicle will accelerate towards the turn, causing the entrance of the turn to be missed.
With practice heel-and-toe braking can be the most efficient way to downshift while reducing speed. It may feel uncomfortable at first, but rest assured that any person who can drive a manual transmission car is capable of heel-and-toe braking; all it takes is practice. The best place to learn heel-and-toe braking is on the streets.
Every time you downshift under braking, practice rolling your foot onto the throttle at the same time. Once you get good, you can even heel-and-toe hill starts.
The line is not the shortest way around the track; it is the fastest. If you drive the shortest line around the track, you will find yourself running on the inside of each turn, which is generally the harshest and slowest part of the turn. The idea behind the line is to transform a turn into a straight line, or the closest thing possible, thus allowing for the maximum amount of time accelerating around the track. There are, however, several lines that can be run throughout the same turn. In order to trick people, most autocross courses consist of different kinds of turns. Possibly the trickiest is the decreasing-radius turn. The decreasing-radius turn is a turn that starts out as a constant-radius turn, but as the turn progresses, the severity of the radius decreases. If you are not careful, this kind of turn will lead to braking during the exit of the turn, a maneuver which should only be done in emergencies. Luckily, decreasing-radius turns are not that difficult to master. .
Turning is not accomplished completely through steering inputs. Throttle steer is when you change the direction of a vehicle in a turn through the use of the throttle instead of the steering wheel. Throttle steering is a great technique for keeping a vehicle on the correct line, without upsetting the vehicle’s stability as much as a steering input. But before you can begin throttle steering, you must enter the turn at nearly the correct speed. The correct speed is the speed just before the front wheels plow through the turn, due to too much speed carried from a straightaway. Until you become an experienced driver, try to have all your braking completed before you enter the turn.
If, when you are in mid-turn, you realize your vehicle is too close to the inside of the turn, increasing the throttle slightly will move the weight off the front tires and push the car to the outside of the turn. Conversely, if the vehicle is outside of the line, releasing the throttle a little will force more weight onto the front tires, and the vehicle will steer closer to the center of the turn. Be careful, however, as too much throttle change could cause the vehicle to spin or slide off the track. Throttle steering inputs are slight and should never be abrupt. Remember, be smooth with all the controls.
Two throttle steering characteristics are throttle oversteer and throttle understeer. Throttle oversteer occurs in rear-wheel-drive cars when the rear tires accelerate beyond the point of traction during a turn, causing the rear end to slide out. Conversely, front-wheel-drive vehicles undergo throttle understeer, when the front tires accelerate beyond the point of traction during a turn, and the front end of the vehicle slides toward the outside of the turn. Because of these handling characteristics, you should be careful (and prepared) when using the throttle to steer.
Do not expect to get onto an autocross course and win the first time out. Winning requires mastering all aspects of driving through practice; lots of it. After awhile however, this will become second nature. Before you know it, you will find yourself heel-and-toe braking into decreasing-radius turns on your drive home every day. But as much as we have covered, there is still plenty more to discuss (like trail braking, slip angles, wet lines, transitory turns, and road camber, to name a few), so we recommend talking to as many racers as possible to hear their strategies and autocrossing as often as you can. The best advice we can give is to have fun and enjoy the ride.