autocross classes
#1
autocross classes
i currently race in a bs class but i am thinking of going to stx. what all aftermarket items could i put on my 05 rx8 that would still keep me in stx?
#2
Your car isn't eligible for STX. The street tire class it is eligible for is STU. Similar ruleset to STX but a different group of cars.
The list of modifications you are allowed is on the scca's website. Specifically:
http://www.scca.org/_FileLibrary/Fil...solo_rules.pdf
Search for STX and then review the STU supplemental rules here:
http://www.scca.com/_FileLibrary/Fil...talclasses.pdf
The list of modifications you are allowed is on the scca's website. Specifically:
http://www.scca.org/_FileLibrary/Fil...solo_rules.pdf
Search for STX and then review the STU supplemental rules here:
http://www.scca.com/_FileLibrary/Fil...talclasses.pdf
#3
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Originally Posted by bohankins
i currently race in a bs class but i am thinking of going to stx. what all aftermarket items could i put on my 05 rx8 that would still keep me in stx?
Biggest things that will kick you out of STU is removal of *all* catalytic converters (you must retain one, even it's a high-flow unit... and I'm not even sure if the RX8 has more than one), clutch, flywheel, tires wider than 275. There are a host of other things that you can do to get put in a higher prep level.
ECU is essentially free for RX8s as long as its programmed in the standard housing.
If I were running STU, I do something like this:
Decent coilovers
Maybe even camberplates for easier adjustment of camber in the front.
Front/rear adjustable sway bars for fine tuning
Better bushings
Better exhaust (lighter) with highflow cat
Seats, both pass and driver (lighter the better... but make sure that with mounting brackets they're 25lbs due to rule change possibly next year)
I think the shifter in the 8 is decent, but a shorter throw never hurts
I also think the LSD in the 8 is good, but there may be better choices out there to replace the stock one.
Lightweight wide wheels (around 9.5-10")
275 tires all around
But before all that.. http://www.autocross.com/evolution
--kC
#4
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Originally Posted by Imp
Essentially, STU can do everything in STS and STX. The difference being an RX8 can run ANY wheel width and 275s vs 245s for AWD cars.
Biggest things that will kick you out of STU is removal of *all* catalytic converters (you must retain one, even it's a high-flow unit... and I'm not even sure if the RX8 has more than one), clutch, flywheel, tires wider than 275. There are a host of other things that you can do to get put in a higher prep level.
ECU is essentially free for RX8s as long as its programmed in the standard housing.
If I were running STU, I do something like this:
Decent coilovers
Maybe even camberplates for easier adjustment of camber in the front.
Front/rear adjustable sway bars for fine tuning
Better bushings
Better exhaust (lighter) with highflow cat
Seats, both pass and driver (lighter the better... but make sure that with mounting brackets they're 25lbs due to rule change possibly next year)
I think the shifter in the 8 is decent, but a shorter throw never hurts
I also think the LSD in the 8 is good, but there may be better choices out there to replace the stock one.
Lightweight wide wheels (around 9.5-10")
275 tires all around
But before all that.. http://www.autocross.com/evolution
Biggest things that will kick you out of STU is removal of *all* catalytic converters (you must retain one, even it's a high-flow unit... and I'm not even sure if the RX8 has more than one), clutch, flywheel, tires wider than 275. There are a host of other things that you can do to get put in a higher prep level.
ECU is essentially free for RX8s as long as its programmed in the standard housing.
If I were running STU, I do something like this:
Decent coilovers
Maybe even camberplates for easier adjustment of camber in the front.
Front/rear adjustable sway bars for fine tuning
Better bushings
Better exhaust (lighter) with highflow cat
Seats, both pass and driver (lighter the better... but make sure that with mounting brackets they're 25lbs due to rule change possibly next year)
I think the shifter in the 8 is decent, but a shorter throw never hurts
I also think the LSD in the 8 is good, but there may be better choices out there to replace the stock one.
Lightweight wide wheels (around 9.5-10")
275 tires all around
But before all that.. http://www.autocross.com/evolution
Also, if you don't want the expense of going with coil-overs, I've had very good results with using Tokico D-Spec adjustable shocks with stock springs. Even on track days, I've gone through the twisties a hell of a lot faster than I ever could before.
#5
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Originally Posted by Paul_in_DC
Also, if you don't want the expense of going with coil-overs, I've had very good results with using Tokico D-Spec adjustable shocks with stock springs.
#6
Originally Posted by Imp
Maybe even camberplates for easier adjustment of camber in the front.
The '8 has one big long catalytic converter. It is very heavy. I'm sure Sipe has the weight of the manifold and catalytic converter pipe in his STU thread.
John
#8
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Originally Posted by Imp
ECU is essentially free for RX8s as long as its programmed in the standard housing.
Originally Posted by Imp
Lightweight wide wheels (around 9.5-10")
275 tires all around
But before all that.. http://www.autocross.com/evolution
275 tires all around
But before all that.. http://www.autocross.com/evolution
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