National Staff Greg G. Posted May 27, 2019 Author National Staff Share Posted May 27, 2019 (edited) 3 hours ago, KW78 said: Hi All, I have read and re-read the rules and the st forum threads today because I am helping with a ST5 build from an existing spec miata. I just wanted to make a comment about the "Style" of rulemaking here while referencing the quote above. As I have no history in the class, I have no idea what the intent was, just what the rule says. A gurney flap is specifically a product to help a wing, so a vertical fence in front of the louver blades of a given vent piece I would not recognize as a separate aero device that was not permitted. Any good vent design will have this, and louver blades under the hood surface would just be a less open hole in the hood, and not an actual venting device. My point is applying intent to the written word and spirit to the rule is why lots of people have left lots of kinds of racing. My ST5 question is this, the floor rule for SM is slightly different than the floor rule for ST5 - both with the intent to allow the larger surround seats. The miata kit however doesn't pass this part: "When inspected from the underside, the OEM floor pan must be unmodified." Has this exception been made somewhere I haven't discovered? Thanks! Kyle Hi Kyle, As I stated above, we have done our best to go away from extremely lengthy and too boring to read rules. Yes, we could write rules that have specifications listed for every single rule like the Spec classes tend to do. Our rules would likely jump from 25 pages to 50-75 pages. So, we do attempt to short hand. So, when we have rules that limit what can be done, like the case of Aero in ST4-6, and it doesn't state anywhere that you can add a Gurney Flap (which by definition is an air dam actually) in front of a vent on a hood, and we have had the rule in place for four years in ST and prior to that in PT with no obvious abuse of the language, we don't mess with it. The manufacturers of the vents are the ones calling these "Gurney Flaps" or lips. So, you call it a "vertical fence", which again, is by definition an Air Dam. And, whether it gets put on the car separately in front of the vent, or gets attached to the vent hardware itself, does not make a difference--still was never permitted (until now--up to 3/8"). In regard to my first statement regarding length and reading of the entire rules, please see Appendix A. See, nobody wants to read the entire set of rules. I get e-mails everyday with drivers telling me their car model, weight, and Max HP(and no other info), and asking my what class they should register for. Appendix A—Technical Bulletins for Specific Models/Items Mazda Miata (’90-’05): The driver’s side floor pan may be modified to accommodate larger/taller drivers. All modification shall be contained between the transmission tunnel, driver’s side rocker, rear bulkhead and no more than 24” forward of rear bulkhead. The modification shall not extend below the factory floor stiffener/frame rail. The steel used in the modification shall be no thinner than .060”. All modifications shall be welded in place. This modification shall serve no other purpose other than seating position. A -0.2 Modification Factor will be assessed for this modification. Once SM decided to change their rules regarding the floor pan, we weren't extremely excited about it, because it is not a modification that we want to see on our ST/TT cars, and in most cases, is absolutely not necessary. But, we did add this modification for SM's, and applied a small Modification Factor since they are the only vehicles permitted to have it. Edited May 27, 2019 by Greg G. Quote Link to comment Share on other sites More sharing options...
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