What to do at the Race Track

[Morris]

Now take the car back to the trailer and let it sit and cool down

1. You can now start jacking the car up and remove the wheels​


Now we can Analyze the Chassis and Suspension

1. Let's look at the overall temperatures of the tires, if the driver is working the car then the temps will be around 200*degrees on new tires. less on older tires.​
2. What we are really interested in is the average temp of the LF, RF, LR, RR, add the three temperature readings and divide by 3 and that will give you an overall average reading of that tire. Do the same for the other tires. This will start to tell you if the car is Under Steering or Over steering in the corners.​
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a. So the idea is to get a overall feel of the car for that track at that time.​

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b. This will tell you that you need to change the Anti-roll bar, springs or shocks at the end of the car that is being worked the hardest, The front or rear of the car that is sticking the best should be left alone and concentrate on getting the over worked end of the car to stick, as time goes by it is a constant issue of getting the vehicle to get the best grip on the track.​

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c. On KMP259 we found out the rear was sticking like a champ and did not show any signs of power oversteer or oversteer on any kind. So we started working on the front suspension because the front Temps were high and indicated a push in the car, by having higher temps and pressures it was easy to see we were over working the front end. We changed the front anti-roll bar from a 1.250"inch bar to a 1.187"inch Anti- roll bar, we also softened up the bump on the front shocks to #2 on bump and left the rebound at the half way point, then the last change we made was to reduce the pressure in the shocks to 125#lbs, all small changes so we could sneak up on the optimium setting.​

3. Next we look at each tire temp to see how our camber looks, the idea is to have the tire flat on the track, so, look at the temperatures across the tire and see what you have to do to the camber, you may need more or less camber to get the tire flat on the track. It is acceptable to have the temps vary by about 10*degrees from the outside temp to the inside temp, with the inside temp being the hottest, 200*/205*/210* on the left front or right front at 210*/205*/200*/ Hottest temps are always on the inside edge of the tire.