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General Chassis Theory What
makes a kart fast? Racing, in the end, is all about completing a lap faster than your competitors. In this pursuit, there are three general areas of improvement available to optimize a racers performance -- horsepower, chassis tuning, and driver ability. When shopping for new street cars, it becomes obvious that the automotive industry primarily makes cars faster by adding horsepower. While this works great for being quickest off of a stop light, it is an area that has effectively been taken out of racers hands by stringent engine rules. Once you have a competitive engine package, the guy beside you has very similar horsepower to yours. The chassis tuning rules are much less stringent than engine rules. This allows chassis tuning to be a very large opportunity to optimize an advantage over the competition. We'll save the driver instruction for the Driver Academy. One
critical issue on any racecar is weight distribution, or put more simply, how
much weight each tire supports. When the car is steady, the weight is
mostly equal between all four tires. With any change in speed or
direction, weight is transferred. When accelerating - weight moves to the
rear, under braking - weight moves toward the front, and in a corner weight is
moved to the outside. Chassis tuning is making adjustments to manage how
and how much weight is transferred. Some
racers are more familiar with chassis tuning cars than karts. When tuning
a car to handle properly, you are adjusting the suspension to more efficiently
manage the transfer of weight in racing situations. Because cars have
suspension, you would like the chassis to have zero flex. This allows you
to adjust the shocks, springs, and anti-sway bars without having an unknown
chassis flex affect the handling of the racecar. Karting
has been designed around a far simpler idea. A kart does not have
suspension separate from the chassis. Every piece of tubing in the kart
flexes in some degree to manage the weight transfer. Some things can be
adjusted, like castor, camber, track width, etc., but other parts of the design
are integral to the chassis. Because the kart acts like a very large
spring, the material and design play a very large role in how well the kart will
perform in any given condition. Karts designed for different classes and
engines are built softer or stiffer to best handle the conditions it will be
raced in. Generally, more horsepower, more speed, or more total weight
requires a stiffer chassis. When
determining a chassis that would best fit your needs, the first issue to figure
out is what engine and class you'll be racing. Additionally, factoring in
your body weight and size will help to find the kart you'll be fastest on.
If you have questions about what would be best for you, please don't hesitate to
call and use our extensive experience in the sport.
This process can seem a bit overwhelming at times, but well informed
choices now make race days much more enjoyable.
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