Originally Posted by: Captain Marksie I'm curious as to how you derived your formula?

The units for your final damping answers aren't accurate. The units for damping are generally Ns/mm and i believe this is what they use in forza.

Converting your formula to only take into account the units we get:

(kg * m/s^2)/(N/m * m^2)

The weight distribution is a percentage and therefore has no units. I'm guessing that the 9.8 constant you included refers to "g", the acceleration due to gravity on earth which has the units m/s^2. Lbs has been converted to kg. If you want to use Lbs, you should use a value of 4.45 instead of 9.8.

I think RRs tunes are top notch. I have tried several and am always impressed with how creative and effective they are. Truly a fan of his tuning.

But the answer is simply that the formula is just plain fudged. RR knows and most tuners know what range of numbers work for settings.

Steps to create new formula...

1. Learn which settings are effective

2. Factor for weight distribution

3. Include real word constants for some pizzazz

4. Fudge numbers til you get desired results *most* of the time

Now thats not good or bad though!

I used the formulas for a little while and found myself plugging in numbers and then building everything else around those calculated figures to make them work. This did not work best for me at all. And nobody, including RR ever claimed these figures to be perfect. But as a GREAT open source tuner, and also as a person willing to share what he uses for baseline tunes, and where to begin, I think he has done a great job overall.