ANDRA Fastlane ANDRA_FASTLANE24 - Page 15

torque Everyone seems to have a different opinion when it comes to tyre pressure. Sure, tyre pressure varies from car to car, but according to chassis builder Jerry Bickel, there are some basic guidelines you can follow. Bickel notes this information is for tyres designed for drag racing and that street car radial tyres will react differently. He also notes the temperature of the track surface definitely affects how much heat you have to put into the tyres – and we’ll get to that too. Here are his insights: Adjusting Front Tyre Pressure Bickel always starts with the front tyres. “The more air you run in your front tyres, the quicker your car will lift out of the staging beams, but don’t exceed the tyre manufacturer’s maximum recommendation,” he explained. “This can help your reaction times and reduces rolling resistance. “One exception to the high front tyre pressure rule has to do with irregular track surfaces. Hard inflated tyres may jump off a bump and cause some loss of directional control. Lowering the tyre pressure a couple of pounds will often help minimise this problem. You can expect slightly higher driver reaction times and increased rolling resistance as a result of this adjustment.” Adjusting Rear Tyre Pressure Tyre pressure for your slicks is dependent on the weight of the car, the tyre type (radial or bias ply) and the wheel rim width, amongst other things. Bickel offers this advice: “The wider the rim, the more tyre inflation pressure you need. The narrower the rim, the less inflation pressure you need. With flexible sidewall drag slicks, the normal pressure range is 4-12 PSI. Check with your tyre supplier and talk to some successful racers in your class to find a good starting point,” he said. “Drag slick inflation pressure must