Originally Posted by: aka Rand0m Her0 One last thing. Rabbit, unless I missed something, your math in your example is wrong. You put 4 x PI squared x 2.5 squared x square root (284)x 1.45 squared =4839.9. The math when I did it looks like this: 4 x PI squared (9.86) x 2.5 squared (6.25) x ((square root of 284 (16.85) x 1.45 squared (2.4)) = 4 x 9.86 x 6.25 x (16.85 x 2.4) = 4 x 9.86 x 6.25 x 40.44 = 9968.46. Which brings me to my final point, I have tested your numbers using different combinations of frequencies and travel and often times you get numbers that give spring rates that aren't even possible, such as a front spring rate of 1400.

Then you're getting something wrong. If you're getting those numbers look at what is going on as I'm getting a range of 200-700. I also stated above my example was wrong in a reply to someone else.

The formula should look like this

4xPI squared x 2.5 squared x square root 284 (mass per corner in KG not LBs) x 1.45 squared =8742.485......

Therefore Spring rate = 874.25 (or as close as you can get)

Set it up for weight distribution +/- difference of distribution so for a 52/48 bias your numbers would look like this.

864.195 (864.2)

830.256 (830.26)

Not 4xPI squared x 2.5 squared x (square root 284 X 1.45 squared). The brackets will force the end of the calculation to be calculated first giving you the wrong total.

Like I said above aswell I'm not forcing anyone to use it, I'm just sharing some knowledge. Before you try and separate your tuning from mine you should try one of the cars set up using my methods and maths. It's all well and good setting the springs up and testing it against your set up but mine is based entirely around around my springs.

A good example of what can be achieved with it is the Ferrari 250berlinetta lusso

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