Creating Guides for AutoX classes, need your help

[Ludachris]

I'm going to be putting together guides to help DSMers see what classes they can compete in for autocross, specifically SCCA. I'd like to break it up by class and create lists of what mods can be done to the car for each class to stay within the rules of that class. If you guys can help me out I'd appreciate it. I'm looking for people who have competed in each class and are familiar with the class rules to post a list of mods that will make a DSM competitive in that class and still stay within the class rules - some insight from fellow DSMers that you can't get just by reading the class rules themselves. I'd like to separate it by 1G Turbo FWD, 1G Turbo AWD, 2G Turbo FWD and 2G Turbo AWD since the parts lists will be different for the 1G and 2G. Once we get those done I can touch on 1G and 2G N/T cars and GVR-4s.

Thanks in advance for the help!

[absolute_DSM]

Just for quick reference, heres some SCCA documents.

Heres the cars seperated by class in a STOCK form. Helps show what competition you may be looking at:
http://www.scca.org/documents/Solo%2...ionsbymake.pdf

The up to date 2008 Solo (AutoX) rules - Modifications allowed per class start at chapter 13 :
http://www.scca.org/documents/Solo%2...lo_Rules_2.pdf

May not be much specific help but I think its important as a basis.

[Ludachris]

Originally Posted by absolute_DSM

Just for quick reference, heres some SCCA documents.

Heres the cars seperated by class in a STOCK form. Helps show what competition you may be looking at:
http://www.scca.org/documents/Solo%2...ionsbymake.pdf

The up to date 2008 Solo (AutoX) rules - Modifications allowed per class start at chapter 13 :
http://www.scca.org/documents/Solo%2...lo_Rules_2.pdf

May not be much specific help but I think its important as a basis.

Yeah I read through those. But I'm hoping I can get people who are participating in certain classes and are familiar with the rules of that class to list all the mods you can do to a DSM to make it competitive and still stay within the rules of that class.

[talonTSIDriver]

I am a board member with the FVSCC so I am fairly familiar with the classifications. I'll start with the stock classes and work my way to Street Prepared and SM.

Stock Class:
Non-Turbo...........HS
Turbo FWD..........GS
Turbo AWD..........DS

Engine Mods Allowed:
-Cat-Back Exhaust
-OEM-Style Air Filter
-Spark plugs & wires

Suspension & Brake Mods Allowed:
-Shock Absorbers (OEM Style, no more than 2-way adjustable)
-Aftermarket wheels, must be same width & diameter with offset within +/- .25inch
-SS Brake lines are allowed for cars 89-92 DSM's only
-OEM fitment Brake pads

Other Mods Allowed:
-Gauges are allowed
-Roll bars/cages are allowed

Please ad/correct me if I am wrong. I have not fully read the new 2008 SCCA rules yet.

Next, Street Prepared

[talonTSIDriver]

Street Prepared Classifications:
Non-Turbo FWD.......DSP
Turbo FWD..............DSP
Turbo AWD.............ESP

Quick Note: Since 1g's and 2g's are listed in the same class, it is legal to interchange parts from one to the other. (Example: 1g BOV on a 2g)

In Street Prepared, boost levels are not to be changed with the exception of an authorized mod. (Example: An aftermarket exhaust system will increase boost slightly) Basically no Boost controller can be used.

Street Prepared allows everything the STOCK class does plus:

Engine Mods:
-Oil pans, Oil Coolers are allowed
-Emissions may be removed
-Water Injection (MUST only be water)
-OE Fitment style Fuel Pump
-Aftermarket Exhaust manifold to muffler (must exit behind driver)
-Aftermarket Clutch/Flywheel (metal type, OE fitment)
-LSD's
-Underdrive/lightweight pully kits

Suspension & Brake Mods:
-Camber kits are allowed
-Strut Bars
-Rims of any size may be used (Tires must meet requirements of stock category)
-Any Sturts may be used (Must use OE attachment points)
-Cross-drilled and/or slotted brake rotors (OE dimensions)
-SS Brake lines
-Polyurethane bushings

Other Mods:
-A/C may be fully removed
-Aftermarket Seats are allowed (must weigh at least 20lbs, and attach at OE mounting points)
-Aftermarket Steering wheel
-Radio and speakers may be removed
-Battery Relocation

Please ad and/or correct any information.

[everbruin]

For stx 2g awd:
1. 245/40/17 dunlop z1 star spec
2. light 8" rims, around +35 mm offset (eg kosei 16 lb)
3. sway bars
4. coilovers (eg koni sport/yellow, ground control kit incl 600 lb front 7", 400 lb rear 7" springs)
5. eccentric or offset front upper urethane bushings for neg camber (eg ingalls 35750)
6. custom shortened front upper arms for neg camber
7. wider exhaust w/ hi flow cat and larger downpipe (eg rre/road race engineering 2.5->3")
8. upper strut tower bars/braces
9. sunroof cars also benefit from a lower front strut bar/brace from road race engineering
10. fuel/timing tuning (via dsmlink)
11. urethane bushings and engine mounts (eg energy suspension)

Front alignment: -3 or more neg, 1/8" toe out
Rear toe: 0

[everbruin]

in SP, boost controllers ARE allowed these days. someone else had to remind me too =)

[talonTSIDriver]

Originally Posted by everbruin

in SP, boost controllers ARE allowed these days. someone else had to remind me too =)

Did that recently change?

Now I am kinda confused, so what mods truely throw a DSM in SM, a bigger turbo?

[Ludachris]

Last time I autox-ed I got tossed in SM for a boost controller and cams. That was 2 seasons ago.

[talonTSIDriver]

Originally Posted by Ludachris

Last time I autox-ed I got tossed in SM for a boost controller and cams. That was 2 seasons ago.

Cams yes, that puts you in SM.

I read through the rules and did not find anything stating that you are allowed to raise boost levels in STX or SP (Other than mods allowed that in turn raise boost, ex: exhaust system)

Some sanctions don’t follow SCCA rules 100%.

[everbruin]

boost change in SP was in 2006. rules under SP Engine:

"Boost regulation systems, either electronic or mechanical,
and electronic fuel cuts referencing boost pressure may be
altered or modified except as prohibited herein. Boost
pressure changes resulting from authorized changes are
permitted."

[talonTSIDriver]

Originally Posted by everbruin

except as prohibited herein

Mmm...

[talonTSIDriver]

Reading into it a little more:

No hardware changes or alterations to turbocharger(s) or
supercharger(s), in size or number, are permitted. Turbochargers
or superchargers may be updated/backdated
only in conjunction with the accompanying complete
engine unit.

So me for example, running a T28, would be put in SM.

and correct me if I am wrong, but if I had a 14b, that is fine as it came off a previous year DSM that is in the same class.

As for altering boost, i think i understand now. altering boost is allows as long as its not altered by changing/altering the wastegate or (on superchaged cars) changing the pully.

again, please someone correct me if I am off.

[everbruin]

something like that; i'd ask the sp guys at dsm-autox : Mailing List for discussing DSM autocross and roadracing .

[talonTSIDriver]

MBC are allowed in SP, However the turbo and wastegate must remain un-modified.

[Pro3racer]

Damn, i need to go back to a 14b! I could be in SP then, haha.

[mavisky]

This is one of the best starters guides for those showing up to their first event.

http://scca-milwaukee.org/Solo/carmo...sification.pdf

[Zero Bar]

A couple things I noticed:

The non-turbo cars are classed in "FSP" not "DSP", the rest are "ESP" as far as I know.

Boost is allowed in "SP" if it's done so electronically, this was the clarification from my local SCCA tech guru, again I'll have to find out for sure as the rule seemed vague to me.

In "ST" and up I believe the balance shaft removal is now allowed, I will find out for sure. Also "ST" you must now have a working cat(maybe even a stock one) and "cel" lights automatically bump you out if you have one or you defeat one. The emissions compliance rule is easy to get around though if you are challenged: Simply claim that you are emissions compliant in some other state(example: New Mexico, I live in Ohio) and they have to prove that otherwise they can't win the challenge!!

Stock, ST, and SP are covered above so I'll add these:
N/T 1G: E Prepared - Gutted cars with only weight restriction and wheel width restriction and few limits.
FWD/AWD Turbo 1G: F Prepared or X Prepared - ^ Same as above almost.
All fall into E Modified(I believe) - As long as it's "safe" it's pretty much legal!!

I can't speak for the 2g's.