These are the items I would like to have clarified for a 2002 Mustang GT

· Gearing

· IRS Swap

· Coil Overs

· Torque Arms

In the 2012 Solo rule book nothing is stated explicitly regarding rear end ratios in street prepared meaning it falls back to stock rules. However, based on line 15.1 B which states that the allowances are only in excess of stock but that if vehicles are on the same line in Appendix A then they are considered the same and parts can be swapped except for engines/transaxles/transmissions which must be replaced in their entirety. Then it would follow that any gear ratios could be used as long as they came in one of the vehicles listed on the same lines. For instance the 2000 Cobra R and 03-04 Cobras came with 3.55 rear ends and an IRS. So, my interpretation would be that I would be within the rules running 3.55’s and an IRS. Additionally though, the Appendix A lists NOC.. Does that mean “not otherwise classified”? Where I was going with this is if a Saleen/Roush/Steeda Mustang of the same vintages listed came with 3.73’s stock, would I still be within the rules to run 3.73s? Bottom line, I have ran ESP previously in Jacksonville, Fl and even CP due to my coil over suspension but have always done it with a set of 3.73s and I thought that I was within the rules previously. May not have been so….

Regarding coil overs, 15.8 A states that the springs must be located in the stock location. However, this line also contains some additional verbiage regarding the use of a coil over setup in that the spring perches can be altered and adjustable. Is there an interpretation of the rules which would allow a coil over setup in ESP on a 2002 mustang? The Mac strut configuration has an inboard spring on the control arm. For instance, Camaros have the spring mounted over the strut. I would interpret the rules such that coil overs would be legal on the front of a Camaro.

Regarding torque arms, I believe there are two important sections. 15.2 E.6 and 15.8 I.2

E.6 states that the toqure arm front mount can NOT be mounted to the SFC.

I.2 allows torque arms.

This means that a torque arm can be integrated into the chassis if it does not tie into the SFC which means that I would be subject to the chassis modification rules. I am interpreting the rules correctly right? This is slightly annoying since all the aftermarket parts out there tie into the SFC’s.

Your help is greatly appreciated!!!

- Nick Augustyniak nick.augustyniak@gmail.com