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Written by Vic R   

Torsion Bars Some chassis have adjustable torsion bars at the rear and sometimes the front. Torsion bars can either be layed flat or vertical. Maximum stiffness (and maxiumum grip) occurs when the bar is vertical. A flat bar will soften the chassis. Removing the bar(s) will reduce chassis softeness further.

Tire Pressures

Tire pressures can range dramatically from as low as 10 psi to 30psi depending on the compound of the tire. For extremely sticky tires you should stay between 8psi and 14psi. For SL tires you can go as high as 16psi . For extremely hard tires you will need to run tire pressures as high as 30psi. All tires have a range in which they work the best. In general, the higher the tire pressure, the faster the tires will come up to race performance and the more grip you will have. However, if you put too much air pressure in the tires, the kart will become very loose. The reason for this is because the high pressures will cause the tire contact patch to form a curve in which there becomes a high point on the center of the contact patch. As a result, only part of the tire is actually touching the track and the kart gets loose. Tires produce most grip in a given temperature range. If the tire temperature is either too hot or cold, grip will reduce.

Front Bumper

The front bumper should be tight at almost all times. However, loosening the front bumper can be used as a tuning tool. Loosening the front bumper will give you more front end bite.

Side PodsIn normal circumstances you will want to leave the side pods tight although you shouldn't be afraid to loosen them as a chassis adjustment. Loosening the side pods will give the kart more side bite and allow for less four wheel sliding.

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