Autocross Setups

Season is starting up and SCCA will be in full tilt for the whole country in about 6 weeks. After doing a hard fought season last year, here seems to be nominal LEGAL setups for appropriate classes (note that the R is SS class due to tires and no back seats):

A-Street

• Adjustable front swaybar at full stiff
• Upgraded front endlinks
• Bridgestone RE71R 305/30-19 square (just do it, 10.5 vs 11 makes zero difference on small courses, trust me)

CAM-C (light setup)

• A-Street
• Caster camber plates, punch everything full out as much as you can
• 19 x 11 wheels square
• Upgraded vertical links
• Rear alignment kit

CAM-C (heavy setup)

• CAM-C (light setup)
• Rear cradle lockout kit
• Bump steer correction kit

Modified

• CAM-C (heavy setup)
• Rear seat delete
• 19 x 11 wheels front, 19 x 12 wheels rear
• Hoosier A7 315/30-19 front, 325/30-19 rear
• GT350R wing or equivalent, not to exceed 8 sq ft surface area
• GT350R front splitter
• Heavy duty brake pads of your choice

Do NOT upgrade power or dial back your tune to a street related or milder tune. When you're coming out of corners, you often end up right in the meat of the torque shift around that 3200 - 4000 RPM range. It's hard to modulate and the last thing you need is more power for course running (on autocross, track is a different story).

Do NOT touch the rear sway bar except for the end links when legal. Remember autocross surfaces are rather imperfect and too much stiffness can throw you off.

For you Track Pack, R, and '17+ guys, run in Sport mode, all nannies off. Track is too stiff.

Happy hunting. You're still gonna lose to an S2000 after index... :doh:

Ill probably end up in Modified because of the splitter LOL

my autocross setup is a Focus RS ;-)

We are getting a lot of setups ready for the track season.

I actually don't like sport mode for autocross because the throttle pedal is more sensitive (more throttle for a given pedal travel).

Are there any AS-legal aftermarket wheel options available for the 350? I'd love to run some lighter wheels, but I can't find anything with a 10.5" width. It's all either 10" or 11".

Forgeline or any custom forged but of course they are pricey.

Talk to Paul at PK design (couple of posts above). He's been great with my Forgeline order.

CasualGuy said:

Are there any AS-legal aftermarket wheel options available for the 350? I'd love to run some lighter wheels, but I can't find anything with a 10.5" width. It's all either 10" or 11".

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I have a set of Forgestars coming that I was able to customize. Talk to one of our distributors on here.

TDC said:

I actually don't like sport mode for autocross because the throttle pedal is more sensitive (more throttle for a given pedal travel).

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Considering the nature of courses, I actually prefer it...you just have to be really aware of what's going on. However I very much enjoy using weight transfer techniques and left foot braking to navigate through courses.

nastang87xx said:

I have a set of Forgestars coming that I was able to customize. Talk to one of our distributors on here.

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That's great news! Could you share which model you ordered as well as the name of the distributor and the cost? PM is fine if you'd rather not post publicly.

nastang87xx said:

Season is starting up and SCCA will be in full tilt for the whole country in about 6 weeks. After doing a hard fought season last year, here seems to be nominal LEGAL setups for appropriate classes (note that the R is SS class due to tires and no back seats):

A-Street

• Adjustable front swaybar at full stiff
• Upgraded front endlinks
• Bridgestone RE71R 305/30-19 square (just do it, 10.5 vs 11 makes zero difference on small courses, trust me)

CAM-C (light setup)

• A-Street
• Caster camber plates, punch everything full out as much as you can
• 19 x 11 wheels square
• Upgraded vertical links
• Rear alignment kit

CAM-C (heavy setup)

• CAM-C (light setup)
• Rear cradle lockout kit
• Bump steer correction kit

Modified

• CAM-C (heavy setup)
• Rear seat delete
• 19 x 11 wheels front, 19 x 12 wheels rear
• Hoosier A7 315/30-19 front, 325/30-19 rear
• GT350R wing or equivalent, not to exceed 8 sq ft surface area
• GT350R front splitter
• Heavy duty brake pads of your choice

Click to expand...

If just stock, what's the class to run in for the GT350?

shiraz said:

If just stock, what's the class to run in for the GT350?

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A street is for stock cars or stock + the minor upgrades as shown in the OP

Yep! In Street, you can run any tire that fits on your stock width wheels down to 200 tread wear. You can run a 1 inch diameter difference wheel as well up or down (stick to the stock wheels). You can modify 1 sway bar and link hardware. You can modify the exhaust from the cats back as long as you do not change the number of mufflers that are on the car.

nastang87xx said:

Yep! In Street, you can run any tire that fits on your stock width wheels down to 200 tread wear. You can run a 1 inch diameter difference wheel as well up or down (stick to the stock wheels). You can modify 1 sway bar and link hardware. You can modify the exhaust from the cats back as long as you do not change the number of mufflers that are on the car.

Click to expand...

Yeah what kills me is you cant run a wider front wheel even if you used the same tires.

firestarter2 said:

Yeah what kills me is you cant run a wider front wheel even if you used the same tires.

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Not wider but bigger or smaller diameter. So you could run a 18" or a 20" if you wanted. But the WIDTH must stay the same. But you can run any tire size that passes tech inspection down to 200 tread. So if I wanted to stuff a 315 up front and a 335 in the rear on my stock wheels, I could.