National Staff Greg G. Posted April 11, 2019 National Staff Share Posted April 11, 2019 (edited) Hi Folks, A bunch of competitors have requested that we look into the possibility of changing the rule regarding the use of non-DOT approved tires in ST3/TT3 (and therefore E0 also). The request being made is to either disallow their use entirely (probably with the few exceptions we have made in the past for tires that are non-DOT but not actually non-DOT racing slicks), or to increase the Modification Factor from -0.5 to -1.0. This request would not change anything in any of the other classes, and would only apply to ST3/TT3. We are soliciting opinions on either of these possible changes here now, and may also do a pole or send out a Survey Monkey to current ST3/TT3 competitors regarding this in the future. Currently, we have less than 20% of ST3/TT3 competitors using non-DOT slicks. Here is the current rule: Tire Type: Non-DOT approved tires (ST1, ST2, ST3 Only) = -0.5(They are already not permitted in ST4-ST6) Additionally, keep in mind that we are soon going to release ST rules revisions (in the next few weeks) that will include a rule that will require racers to use the same ST Car Classification form (without changes) for Qualifying and the Race (or forfeit the qualifying position and go to the back of the class/grid for the race). So, the practice of using different Minimum Comp. Wt, or tires that have different Mod. Factors for qualifying will be going away. We will give a few months of lead time for this one to take effect so drivers can use up tires they won't need in the future. And, this rule will only apply to changes to the vehicle that would change the Car Classification Form or require a new Dyno test. So, for example, in ST1-3, a driver could still run on an "A" tire in qualifying and an "R" tire in the race if desired (assuming no changes to tire size Mod Factors), because there would be no differences on the ST CC Form. But, an ST4 driver would not be able to, because there is a Mod Factor for "A" tires in ST4. The proposed reason that we were given for these requested changes are that the current Modification Factor for non-DOT tires is not enough to cover the performance benefit in ST3/TT3, and that with the large majority of competitors not on these tires, a rule change will prevent the majority from having to switch wheels and tires to non-DOT's to "keep up". (FYI, none of the above necessarily reflects what my opinion or the opinion of the NASA National is--just describing the request so that a discussion can take place). Fire away--and please stay objective and civil. 😀 Edited December 27, 2019 by Greg G. Quote Link to comment Share on other sites More sharing options...
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