Cal Club Autocross Forums

Hey guys,

A newbie here with a 2003 BMW M5 looking for some help in classing. I'm thinking Street Modified, but I might be way off...

Here's a list of my mods:
Front seats replaced with Sparco EVO II's and Schroth 4-pt harnesses
355x32 ST-60 Stoptech Trophy kit with Hawk DTC-70's up front
Stainless rear brake lines with stock rotors and DTC-70's
Ground Control coilovers front and rear with adjustable camber
Adjustable rear control arms by Thayer Motorsports
Clutchmasters stage 4 6-puck metallic race clutch
13lb JB Racing flywheel
Clutch delay valve removed
18x9.5 Volk TE37 SL's with 275/35/18 BFG R1-S's

Other mods planned down the road include air intake with MAF delete, equal-length headers, 100-cel race cats, rear X-pipe, Supersprint F1-Race mufflers and a custom ECU tune for all these parts. But I can adjust classes once all that gets done down the road.

Thanks a million,
Rick

MB_Fahrer wrote:Hey guys,

A newbie here with a 2003 BMW M5 looking for some help in classing. I'm thinking Street Modified, but I might be way off...

Here's a list of my mods:
Front seats replaced with Sparco EVO II's and Schroth 4-pt harnesses
355x32 ST-60 Stoptech Trophy kit with Hawk DTC-70's up front
Stainless rear brake lines with stock rotors and DTC-70's
Ground Control coilovers front and rear with adjustable camber
Adjustable rear control arms by Thayer Motorsports
Clutchmasters stage 4 6-puck metallic race clutch
13lb JB Racing flywheel
Clutch delay valve removed
18x9.5 Volk TE37 SL's with 275/35/18 BFG R1-S's

Other mods planned down the road include air intake with MAF delete, equal-length headers, 100-cel race cats, rear X-pipe, Supersprint F1-Race mufflers and a custom ECU tune for all these parts. But I can adjust classes once all that gets done down the road.

Thanks a million,
Rick

We have a local class called CSM that you can run in - it's essentially a "run whatcha brung" class on DOT tires. That way you can focus on driving instead of going through a rule book. However, your mods, if I am reading correctly, place you in a Prepared class. I'm pretty sure those control arms have rod ends - so, i'd run CSM to start. Just drive and have fun!

Adam Tarnoff wrote:We have a local class called CSM that you can run in - it's essentially a "run whatcha brung" class on DOT tires. That way you can focus on driving instead of going through a rule book. However, your mods, if I am reading correctly, place you in a Prepared class. I'm pretty sure those control arms have rod ends - so, i'd run CSM to start. Just drive and have fun!

Awesome. Do you know where I can find the rules and regs for CSM? I'm just out to have fun with the M5 until I get my race car out here in California (moved back here from Colorado). I used to autocross years ago with an E36 M3 in STU before the rules changed back in...2007 or so.

Thanks for your help--much appreciated!
Rick

Actually, you want CST. No rules on street tires.

Max Hayter wrote:Actually, you want CST. No rules on street tires.

Aren't R1-s DOT-r?

Adam Tarnoff wrote:

Max Hayter wrote:Actually, you want CST. No rules on street tires.

Aren't R1-s DOT-r?

Ahhh... missed that.

... no problem.

CSM then.

Each class (CST, CSM) have essentially two rules. One they share, one that differentiates the two.
Both: Car must be capable of being registered to drive on the street. (Does not have to be reg... just capable of being reg in CA)
CST - Street tires 140tw or greater (May change to 200tw... TBD)
CSM: - Dot approved tires. (aka autocross "race" rubber)

Really appreciate the help. Thank you much!

2010 MX-5

Ran in the event yesterday in C Street, had a blast, but wanted to get some stickier rubber so I could be a little closer to everyone else in class, get a better idea of how I was driving. Found some Kumho XS tires on firesale ($60 a piece w/free shipping). Forgot to check treadwear. 180. Can't cancel.

What class did I just kill myself in? CSP? CST?

ianwhthse wrote:2010 MX-5

Ran in the event yesterday in C Street, had a blast, but wanted to get some stickier rubber so I could be a little closer to everyone else in class, get a better idea of how I was driving. Found some Kumho XS tires on firesale ($60 a piece w/free shipping). Forgot to check treadwear. 180. Can't cancel.

What class did I just kill myself in? SM2? CST?

I think CST is the only place 140+ is still allowed, unless you want to run CSP.

Having said that, Kumho XS suck pretty bad, so I doubt anyone in CS would care that much if you ran with them. You should have bought the Kumho V720.

Max Hayter wrote:

ianwhthse wrote:2010 MX-5

Ran in the event yesterday in C Street, had a blast, but wanted to get some stickier rubber so I could be a little closer to everyone else in class, get a better idea of how I was driving. Found some Kumho XS tires on firesale ($60 a piece w/free shipping). Forgot to check treadwear. 180. Can't cancel.

What class did I just kill myself in? SM2? CST?

I think CST is the only place 140+ is still allowed, unless you want to run CSP.

Having said that, Kumho XS suck pretty bad, so I doubt anyone in CS would care that much if you ran with them. You should have bought the Kumho V720.

Yeah, was re-reading SP rules and realized I could go there.

And yeah, the XS wasn't competitive when it was new, but figured it would be close enough for me to destroy when I was working on the nut behind the wheel. =D

Thanks,

The XS needs a lot of heat to work at all... just bear that in mind if it's cold and/or wet.

Hello All..

New to the sport, just about finished with my car. Looking at going to an event in January. Pls. enlighten me with classing my car.

My Car:

1975 Toyota Corolla SR5
1.8L Twin Cam Turbo (1.8L OHV stock)
-Standalone EFI
-440cc Inj. (298cc stock)
-Custom Plenum w/ 68mm Throttle Body
-Upgraded turbo
-Custom Radiator
-Custom Intercooler
-3 inch exhaust
Adjustable Front Suspension
-Adjustable shock absorbers
-Adjustable Camber Plates
-Adjustable Coilovers
-NRCA
-Strut Bar
Ford 8.8 Posi
-Adjustable rear shock absorbers
-Lowering blocks
4 piston front calipers, slotted rotors
15x7 aluminum wheels, 195 50R15
Stock interior

Your assistance is truly appreciated.

Ryan

chesmari wrote: My Car:

1975 Toyota Corolla SR5

Ryan

Nice looking third Gen.
Keep it on 140TW tires (or higher), and go play in a local... run what you brung, (street legal) class: CST

Craig Naylor wrote:

chesmari wrote: My Car:

1975 Toyota Corolla SR5

Ryan

Nice looking third Gen.
Keep it on 140TW tires (or higher), and go play in a local... run what you brung, (street legal) class: CST

Got it. Thank you.

Ryan

Car seems to be legal for SCCAs Street Mod class - so long as it is over 2160 lbs.
that's based on 1800cc turbo, solid rear axle and <275 size tires.
So that's another place to play if you want to run sticky Hoosier DOT race tires.

Robert Puertas wrote:Car seems to be legal for SCCAs Street Mod class - so long as it is over 2160 lbs.
that's based on 1800cc turbo, solid rear axle and <275 size tires.
So that's another place to play if you want to run sticky Hoosier DOT race tires.

Will definitely keep that in mind. Thank you.


Ryan

Craig Naylor wrote:

chesmari wrote: My Car:

1975 Toyota Corolla SR5

Ryan

Nice looking third Gen.
Keep it on 140TW tires (or higher), and go play in a local... run what you brung, (street legal) class: CST

Can we still use 140TW tires in CST? I know all the street classes moved to 200TW tires.

I need to find a good use for some XS tires...

Ron Tsumura wrote:

Craig Naylor wrote:

chesmari wrote: My Car:

1975 Toyota Corolla SR5

Ryan

Nice looking third Gen.
Keep it on 140TW tires (or higher), and go play in a local... run what you brung, (street legal) class: CST

Can we still use 140TW tires in CST? I know all the street classes moved to 200TW tires.

I need to find a good use for some XS tires...

As far as I know (unless something's changed since August of this year), CST is still allowed to run 140TW.

Thanks QV!

Hi All,
First time looking to participate in an SCCA autocross, I was wondering which class I would fall in with my car as it is as there are a few items that wasn't sure about. So far I may fall into STR but I'm unsure on how the bracing, exhintake mod and the seat will affect the classing. Here are the modification details:

1996 Mazda Miata
Drivetrain:
4.1 Rear End Ratio Torsen Differential
Polyurethane Diff Bushings
5-Speed Transmission
Racing Beat Header
Racing Beat Catback Exhaust
Exhintake Mod
Mazdaspeed Motor Mounts

Suspension/Handling:
Flyin Miata Butterfly Brace
Frog Arm Brace
2003 Miata "Strut" Tower Brace
Bilstein/Ground Control Coilovers
Stiffer than stock rubber suspension bushings
Swaybars Removed
Polyurethane Steering Rack Bushings
4 Point Roll Bar
15x8 Wheels
205-50-15 BFG Rival (Not Rival-S)

Others:
Cobra Suzuka Seat Mounted to stock location
6-pt Harness

Everything else not mentioned is stock or stock equivalent.
Thanks in advance!

fredricktsang wrote:Hi All,
First time looking to participate in an SCCA autocross, I was wondering which class I would fall in with my car as it is as there are a few items that wasn't sure about. So far I may fall into STR but I'm unsure on how the bracing, exhintake mod and the seat will affect the classing. Here are the modification details:

1996 Mazda Miata
Drivetrain:
4.1 Rear End Ratio Torsen Differential
Polyurethane Diff Bushings
5-Speed Transmission
Racing Beat Header
Racing Beat Catback Exhaust
Exhintake Mod
Mazdaspeed Motor Mounts

Suspension/Handling:
Flyin Miata Butterfly Brace
Frog Arm Brace
2003 Miata "Strut" Tower Brace
Bilstein/Ground Control Coilovers
Stiffer than stock rubber suspension bushings
Swaybars Removed
Polyurethane Steering Rack Bushings
4 Point Roll Bar
15x8 Wheels
205-50-15 BFG Rival (Not Rival-S)

Others:
Cobra Suzuka Seat Mounted to stock location
6-pt Harness

Everything else not mentioned is stock or stock equivalent.
Thanks in advance!

The cam would put you in to SSM, where you would be very underprepped.

You might want to consider competing in our regional CST (California Street Touring) class, which is our local "run what you brung" class. The car just needs to be a registered street vehicle and on 140tw or higher street tires
The class is fairly large and folks are very friendly!

Sean Fenstermacher wrote: The cam would put you in to SSM, where you would be very underprepped.

You might want to consider competing in our regional CST (California Street Touring) class, which is our local "run what you brung" class. The car just needs to be a registered street vehicle and on 140tw or higher street tires
The class is fairly large and folks are very friendly!

Thanks for the advice! I had a feeling the cam swap would put me in some insane class.

Is an electric powered car legal for AM?

Art Rinner wrote:Is an electric powered car legal for AM?

Nothing in the rules prevents it.