Race Tips - Adjustment Cheat Sheet
Race cars tend to need constant adjustment. Camber, toe, ride heights, etc. are commonly adjusted at the track, but often the process can be frustrating and time consuming. One problem is target adjustments are typically in degrees, inches or mm, but the physical process is flats, flops, turns or shims.
Rather than fumbling with "smart levels" camber gauges or tape measures for adjustment goals, develop a "pit lane cheat sheet" for the physical adjustments. Now that racing season is wrapping up this is the perfect time to develop your cheat sheet because you're not preping the car to race.
Start your process by selecting a parameter and getting your baseline value (say camber). Next, make a physical adjustment (say one turn) and measure your new value. Subtract the previous value to identify the camber change for the one turn (don't forget to write it down). Repeat the process with several more adjustments on the same parameter to see if the adjustment produces consistent values. Once completed you now know 1 turn = X camber change. Likewise, you can divide the value by six and you also know what a single flat will do to your parameter.
If you use the same process on all the adjustable parameters of your suspension and transfer all the information to a single sheet you will have a tool to help you make fast and accurate adjustments on the car without gauges, tapes, scales, etc. But why stop with suspension parameters? You can also do the same trick for brakes or any other aspect of the car.
News - Intro Data Acq Classes and Now Advanced Data Acq Classes - Starting Oct 10th
Winners know a secret! There is more speed to be gained from data acquisition than anything else in racing. They also know that dollar for dollar, using data acq is the best value for speed by a huge margin.
Now, you can benefit from the same secrets by joining our Data Acquisition Webinars. There are two levels of classes perfectly tailored to fit your individual needs. The first series is customized for AiM, CDS & Pi data systems with separate classes for the specific brands. You will see specific tips and tricks for your particular data software. The pace is comfortable enough for new data users and covers material beneficial to intermediate racers. Past attendees all agree the webinars are a huge boost to their racing efforts. To see endorsements or sign up click here.
Take a ride on the wild side with our Advanced Data Webinars. See how to turn your data system into a rolling engine dyno and a mobile wind tunnel at the same time. Past attendees have commented "What I gained from this one class was worth the price alone."
Don't wait! click here to sign up.
|Equation of the Month - Motion Ratio for Wheel Rates + Bonus Tip|
Nearly everyone understands the difference between spring rate and wheel rate. Likewise, many people are familiar with the equation: spring rate * motion ratio^2 = wheel rate. The difficulty for many is establishing the motion ratio. There are more equations associated with motion ratio, but here is a quick tip for motion ratios that's so easy you can practically do it in your head.
Start by measuring & recording the static spring height with the car on a level floor. For cars that use "coil-overs" you can also just measure the static shock length. Next, carefully jack the car up so the ride height is elevated exactly 1 inch. Measure the new spring length or shock length. The difference between the measurements is the motion ratio. Just make sure you didn't lift the wheels off the ground during this procedure.
For example: If your first measurement is 7" and the second measurement is 7.75" then the difference is 0.75 which happens to be your motion ratio. Need another example? Say the first measurement is 6-7/8" and the second measurement is 7-3/8". The difference is 1/2" or a 0.5 motion ratio.
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