BrandonF30 Posted July 8 Share Posted July 8 New to autocross and unsure what class I fall into, thanks for any help in advance!! 2013 bmw 328i -bootmod3 stage 1 tune -bootmod3 8 speed DSG sport transmission tune -resonator and muffler delete -H&R super sport springs Quote Link to comment Share on other sites More sharing options...
freakin_elrod Posted July 8 Share Posted July 8 https://www.scca.com/downloads/60877-2022-solo-rule-book-1/download 1 Quote Link to comment Share on other sites More sharing options...
civil Posted July 8 Share Posted July 8 11 hours ago, BrandonF30 said: New to autocross and unsure what class I fall into, thanks for any help in advance!! 2013 bmw 328i -bootmod3 stage 1 tune -bootmod3 8 speed DSG sport transmission tune -resonator and muffler delete -H&R super sport springs Looks like you fall in DSP(D Street Prepared). Use what Sid posted though to double check. Street Prepared rules start on Page 98. 1 Quote Link to comment Share on other sites More sharing options...
cgroppi Posted July 8 Share Posted July 8 I think actually the car is legal for STU as well. The engine and transmission tune are legal there. 1 Quote Link to comment Share on other sites More sharing options...
BrandonF30 Posted July 8 Author Share Posted July 8 3 hours ago, cgroppi said: I think actually the car is legal for STU as well. The engine and transmission tune are legal there. The engine tune jumped me up boost from 16-22psi. Does adding boost still keep it legal for STU? Quote Link to comment Share on other sites More sharing options...
freakin_elrod Posted July 9 Share Posted July 9 (edited) 2 hours ago, BrandonF30 said: The engine tune jumped me up boost from 16-22psi. Does adding boost still keep it legal for STU? Upping the boost doesn't matter as long it's from the result of the tune and not mechanical, i.e. no external wastegate, manual boost controller, etc. Tunes are very difficult to police so it's pretty much whatever, unless of course you are running a tune that isn't pump 91-93 ish, but e85 or similar. Then that would bump you out of Street touring entirely unless flex fuel was an OEM option out of the factory which I don't believe your BMW would fall under. Edited July 9 by freakin_elrod 1 Quote Link to comment Share on other sites More sharing options...
BrandonF30 Posted July 9 Author Share Posted July 9 29 minutes ago, freakin_elrod said: Upping the boost doesn't matter as long it's from the result of the tune and not mechanical, i.e. no external wastegate, manual boost controller, etc. Tunes are very difficult to police so it's pretty much whatever, unless of course you are running a tune that isn't pump 91-93 ish, but e85 or similar. Then that would bump you out of Street touring entirely unless flex fuel was an OEM option out of the factory which I don't believe your BMW would fall under. Ok so I could run in the STU class. Thank you Quote Link to comment Share on other sites More sharing options...
Kim Posted July 10 Share Posted July 10 - resonator and muffler delete not sure what impact that has on the car’s exhaust sound level but assume you are aware that AMP has DB limits of 92 on the skidpad Quote Link to comment Share on other sites More sharing options...
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