Cars driven mostly or exclusively on the track In the end, the driver will decide what he or she prefers when behind the wheel. braking, especially when braking in curved paths. With all of this performance-alignment advice for different types of cars, I will leave you with this caution: All of these baseline setups are absolute tire killers if you drive your car daily on the road. toe links will tend to make the car understeer - the rear tires will follow the front under throttle (this would be power oversteer). many track alignment settings are designed to move the cars closer to neutral tires, and will push the front tires forward in a straight line. An extreme amount of toe can produce noticeable drag on the straights toe produces more drag than zero toe. left and right tires. Street Legal Mario Kart! majority of the time is spent driving in straight lines, the effects of this More rear toe-out for a loose feel? adjustable ones. all conditions, potentially resulting in power oversteer in corner exits Caster is normally adjusted the same way front camber would be - via with inside edges wearing much quicker than the rest of the tire. At Mid-Ohio, he changes the cross-weight. use the toe adjustment to balance the car. One other thing is make sure the alignment is where the camber hits close to zero when you launch. Front Camber: 3-degrees negative It is easy to illustrate how camber thrust works on a typical circle track race car. This is why if you look in the street stock pits at your local bullring, most of the cars are shorter wheelbase models, like vintage Camaros. the adjustment potential and handling of the car. run -1 to -1.5 degrees of camber, depending primarily on street/track That is an incredible racing resume. More front negative camber for mid-corner grip? However, it is rare to set up a rear-drive race car toed out in the rear, since doing so causes excessive oversteer, particularly when power is applied. Because, when the front tires are toed-out, there is a constant slip angle on the tire and distortion, so when you turn the wheel the car instantly goes that direction. Thrust Angle. and smallest when the car is cornering. Now, if your goal is to go to the track and crush the competition, then use the information above to go out and set your personal best at your next track day. Rear Toe: 1/8-inch toe-in total. attachment points, not shock upper mounts. at a point forward of the car. and could easily go into a drift under trailbraking or with aggressive Front Caster: 5-degrees positive Front Toe: 3/16-inch toe-out total If I run any toe at all, I will add a millimeter of toe-out to the front.”, For Hondas, he just runs as much positive caster as possible. Factory Alignment Specs. oversteer more, while making the rear camber more negative while keeping the This clean Honda Challenge race car is the workhorse of NASA racer Marcel DeKerpel. We have covered Do-It-Yourself Alignment before on TURNology which gives a great overview of what caster, camber, and toe is for vehicle alignments. road course setup employs either zero front toe or minimal front toe in its rear tires following the front tires; it wil tend to be stable under With most production cars set up to strongly understeer from the factory, around the car's center. You are trying to put power down through the front wheels, but power transfers weight off the front wheels to the rear wheels - so the harder you accelerate, the more weight goes rearward, the less grip you have on the driven wheels. If you set a static rear toe-out setting on a Porsche 911; under acceleration, the suspension moves, pointing those rear tires outward more than you would prefer, which makes the car extremely scary to drive. Today, we will skip the alignment tutorial and get right down to the specifications you can dial into your car that can make you faster. additional eccentric. on the driven wheels would tend to spin them under throttle, Without a baseline acceleration and which is turned less than the entire car, thus causing understeer. To get another perspective from a rear-wheel-drive car — but with a lot less horsepower — we went to Maita Master Jim Drago, who owns East Street Racing (ESR). And the drivers don’t like that, which will affect lap times.”. For that, we looked to a guy who has won more NASA National Championship than anyone else, Dave Schotz, who has spent some time playing with Nissan GT-Rs. much power the car has. The vehicle’s weight will shift from the rear to the front side, causing lift-off oversteer or FWD drifting. Learn how you can get your car's wheel alignment dialed in for maximum cornering grip for when you hit the track with our lesson on trackside wheel alignment. I have discovered and developed the Dynamic Rear Steer(DRS) system for VW race cars that works for all racing situations. braking and acceleration, as well as shifting of this contact patch Depending on your car, you may not be able to adjust all of the parameters. Low to medium power street car: minimally positive toe, front and rear The late ’70s model Camaro was (and still is) an extremely popular racing car simply because its wheelbase is the shortest allowed by many local rules. Today we are going to look at alignment settings specifically as they apply and brake less and therefore are able to effectively utilize more camber Some cars, for example Miatas, desire a specific front to rear camber difference If you want anything more than that, you need to install aftermarket upper control arms.”. … Craig is an engineer, so if you let him talk, he will open up your mind to concepts you may not have thought about before — unless you spend your spare time hanging out in a physics classroom. a small movement of the steering wheel will be sufficient to get the car to rotate. What really makes a car actually turn is the tires’ distortion between the contact patch on the racing surface and the wheel. One of the things he mentioned was how a tire needs the slip angle. We'll send you raw engine tech articles, news, features, and videos every week from TURNology. Marcel has years of experience prepping front-wheel-drive Hondas and Acuras for himself and other drivers. Rob Krider will race absolutely anything. is drag on the straights. Running front camber more negative than rear camber. Front Toe: 1 millimeter out, both sides (2 millimeters out total) A car with excessive negative camber We will start things off with Front Wheel Drive. by intermediate-level drivers run -2 to -3 Understeer rather than oversteer is important so that the car can This is why rear-wheel-drive cars need static toe-in setup in the alignment. A car with positive front toe will tend to track straight even in the You can see the extreme alignment settings on Jim Drago’s Spec Miata.
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