Grand Am Series
Join Date: Aug 2010
Location: District of Columbia
Re: What classes do the MS3 fall in for autocross?
None of your mods are DS legal. They are all STX legal, with the condition that boost can not be altered.
From the local *MS3 guys running here (1 STX, 2 DSP) using Cobb APs, it can do both add boost and not. Apparently, there is a tune that will give you gains using traditional parameters not including increasing boost. Obviously there will be minimal gains, but it isn't completely useless and doesn't automatically kick you out of STX for using it.
DSP is the next step, then there's also SMF (a good bit more allowed). The 2012 SMF pax (0.852) is basically identical to DSP (0.851) meaning they run the same times. If you build to DSP rules, you can choose to run either depending on your local competition without suffering in overall pax.
2006 Titanium Gray Mazda3
#23 STF WDCR SCCA
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