GHwerks Posted December 17, 2020 Share Posted December 17, 2020 I’m assuming I missed it somewhere in the rules, but I don’t seem information on splitters and diffusers for ST3. I see the allowance for an axle forward front tray. Does someone have a link a rule reference that has all the details? Also, just so I understand, there are no aero modifications allowed in reshaping the front fascia, correct? (ie cutting a lower portion of the fascia and recessing backward) Quote Link to comment Share on other sites More sharing options...
Clavette Posted December 18, 2020 Share Posted December 18, 2020 I don't believe there is specific language on diffusers but I asked Greg G and he indicated that it would be prudent to apply front splitter rules to rear diffuser - i.e width and how far it extends in reference to rear most point of bumper. Mine extends 8". I would actually like it shorter but I have the AJ Hartman generic 5-piece and couldn't easily move it more forward. Quote Link to comment Share on other sites More sharing options...
GHwerks Posted December 18, 2020 Author Share Posted December 18, 2020 Thanks for the reply. Do you have a link or arrival number number that covers the splitter rules? Quote Link to comment Share on other sites More sharing options...
Clavette Posted December 18, 2020 Share Posted December 18, 2020 Link from main site appears to be broken, but found this link. Look at 6.1.1. https://nasa-assets.s3.amazonaws.com/document/document/20305/ST1-4___SU_Rules_2020--v14.2--2-11-20.pdf 1 Quote Link to comment Share on other sites More sharing options...
Members Mike W. Posted December 20, 2020 Members Share Posted December 20, 2020 The rules for all classes can be found on the on nasaproracing.com also. https://www.nasaproracing.com/rules Quote Link to comment Share on other sites More sharing options...
GHwerks Posted December 24, 2020 Author Share Posted December 24, 2020 On 12/20/2020 at 6:34 AM, Mike W. said: I have the rules printed out. I just must have glanced over the single line of splitter rules because I was expecting a longer list of rules. Quote Link to comment Share on other sites More sharing options...
davidfarmer Posted February 18, 2021 Share Posted February 18, 2021 Aero in SU, ST1, ST2, and ST3 are pretty much unlimited. ST4 and higher are where restrictions come in. The rules basically say devices can't be more than 6" wider than the cars body, and more than 12" extended in the front. You also can have winglets etc higher than the hood. There are restrictions to the roof line, rocker panels etc, but I think you are probably talking about wings, splitters, undertrays and winglets/canards Quote Link to comment Share on other sites More sharing options...
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