Need some help on suspension modifications please.

[steved0x]

I think the "all" in "Boxster (986 chassis, all) (1997-2004)" means base and S models. However I think STU is a better class; If I run SCCA autocross again I will run in STU since the mods that I have done for HPDE move me out of the street class (used to be B Street for the 986 Boxster S)

[eicheldp]

Originally Posted by steved0x

I think the "all" in "Boxster (986 chassis, all) (1997-2004)" means base and S models. However I think STU is a better class; If I run SCCA autocross again I will run in STU since the mods that I have done for HPDE move me out of the street class (used to be B Street for the 986 Boxster S)

But with no engine or suspension mods wouldn’t CS be more appropriate for my situation?

[jakeru]

Originally Posted by eicheldp

But with no engine or suspension mods wouldn’t CS be more appropriate for my situation?

To me, this is a no-brainer to try and keep in Street class, unless you want to go all-out making a whole bunch of mods. STU is indeed still a faster class than CS, with about 2.5% shorter lap times expected, based on recent handicap adjustment factors (called PAX factors).

From 2017 PAX/RTP Index :

CS index = .810
STU index = .831

.81 / .831 = .975

(In other words a 2.5% shorter STU time than CS would get even pax index-adjusted performance.)

I'd strongly consider keep it Street class legal! The "S" 986 may actually end up being a great car to have for CS. I believe it was recently reclassed.