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[Sylvain b]

Hi guys.

I am planning on doing some Time Attack next year. For this reason I will add a roll cage to my SM class impreza. But I would realy like to stay in SM for this season.

I have read 2015 rules and there is three things I am not sure about:
- I can have 6 points and 2 more optionnal "braces"? what is the difference between an attachement point and braces?
- Roll cage should meet "Club Racing General Competition Rules". Where can I find these rules? I did not find them on SCCA website. They should be there
- If the "brace" are welded to the firewall, Can I have another section welded at the other side of the firewall? This way I could benefit from the added rigidity!?

Thanks.

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[Annihilator817]

My guess is that no part of the cage can go through or past the firewall.

[subydude]

I would actually write a letter into the SCCA asking them. The GCR is on the club racing site, or should be since it's the rule book for that section.

[Sylvain b]

Originally Posted by Annihilator817

My guess is that no part of the cage can go through or past the firewall.

It will not go through. The cage will be welded on one side of the firewall.

BUT, there will be an other part welded on the other side of the firewall. This way, nothing goes through the firewall BUT I get some more rigidity.

Originally Posted by subydude

I would actually write a letter into the SCCA asking them. The GCR is on the club racing site, or should be since it's the rule book for that section.

I have them now. Thanks!

[JourdanWithaU]

I think that would be exactly what the rule is trying to prevent.


No other thoughts on the radiator shroud?

[Annihilator817]

I'd say that as long as it is only welded to the two front strut towers, and doesn't tie into the rest of the cage, you're fine.

[Sylvain b]

Originally Posted by JourdanWithaU

I think that would be exactly what the rule is trying to prevent.

It could be it or safety (fire, exhaust gas, hot liquid...).

[shutout809]

Hey guys just curious what class my car would be in:

2011 wrx
Cobb stage 1
Catback Exhaust
rce black springs/ bilstein struts
stock wheels and tires

I think I would flash back to stock because if I'm not mistaken the Cobb stage 1 would bump me up a few classes.

[JourdanWithaU]

STX if at stock boost

ASP if you're running more boost


I don't know if stage 1 changes boost or not.

[Illini_STi]

Stage 1 ups boost. That's where most of the gains come from.

[yosemitemtb]

Just run the stock realtime map, or get a downpipe and use the STX map. I'm not so up on the newer WRX's as I'm still driving my bugeye 13 years later , but the boost gain I get from class legal hardware like my downpipe is legal.

[yosemitemtb]

Well how about that! I was just looking at the classing in the rule book on SCCA's site and 2008-2014 WRX's go to STU. 2002-2007 and 2015 go to STX. Link below goes to the rule book, here's the link to the pdf titled Appendix A - Automobile Classes The STX and STU class cars are listed on pages 18 and 19 there.

http://www.scca.com/solo/content.cfm?cid=44517

[FasterBlaster]

Originally Posted by shutout809

Hey guys just curious what class my car would be in:

2011 wrx
Cobb stage 1
Catback Exhaust
rce black springs/ bilstein struts
stock wheels and tires

I think I would flash back to stock because if I'm not mistaken the Cobb stage 1 would bump me up a few classes.

Originally Posted by JourdanWithaU

STX if at stock boost

ASP if you're running more boost


I don't know if stage 1 changes boost or not.

I'm curious about this, too. I have a similar set-up but still stock suspension aside from a 24mm RSB. Is it the springs or the shocks that would put him in STU if he runs a stock tune on the AP? Next season, I want to put on some double- or single-adjustable shocks and stiffer springs, and I was thinking that would still be compliant with DS, or does this default to 'since it isn't explicitly allowed by the rules, it's not allowed at all?'

Sorry if this has been covered elsewhere, but I want to be sure I understand the rule regarding brakes in DS. According to SCCA National Solo rule 13.6(A) "The make and material of brake linings may be changed." Does this mean I can go with more aggressive pad compounds? I understand that I can't throw drilled and slotted rotors onto my heap, but that wording feels pretty vague when considering upgraded pads. I figured I would ask around at ATLSCCA Points 4 this weekend, too. I really want more competent brake pads to deal with occasional track-day-level heat at AMP or Road Atlanta while maintaining compliance with D Street rules.

[Annihilator817]

You cannot change the springs in Stock/Street class.

[~The_Duke~]

The Cobb OTS tunes; I believe there is one in there that doesn't mess with the boost pressure. That is the one my competitor is using, he would be a good person to ask. The rule is that you can change any exhaust piece you want to. header, up pipe, down pipe, cat back, axle. As long as it has a cat in the system.

Springs and shocks will only put you to STU. You can use any spring\shock\coilover combo you want in ST as long as it has the factory mounting points.

In STU you can run SS lines, what ever rotors or pads you want, as long as you don't change the size of the rotor or the caliper.

The best STU pad you can get is the Hawk HP+, they are noisy, but damn they stop well. That is the pad that I am running.

I am #25 STU in the PBP hatch. Come by and talk shop. I am always free for questions.

[Splash]

You can't run any non-stock map in street category. No matter what Stage 1 changes (and I know it does alter boost), it's not going to be legal in Street.

STU can run alternate sized brakes, but they can't be smaller/lighter.

[justint5387]

Originally Posted by Splash

You can't run any non-stock map in street category. No matter what Stage 1 changes (and I know it does alter boost), it's not going to be legal in Street.

STU can run alternate sized brakes, but they can't be smaller/lighter.

Not sure if you meant non-stock "Cobb AP" maps or any non-stock map. Just to clarify, you can run the Cobb Stage0 map since that is a stock map, and you can run any map that doesn't mess with boost control (includes wastegate duty cycle).

For brakes, you can run lighter ones. The requirement is that it has to be equal or larger than the stock dimensions (diameter, width, and number of pistons).

[CopperTopNWOR]

Originally Posted by justint5387

Not sure if you meant non-stock "Cobb AP" maps or any non-stock map. Just to clarify, you can run the Cobb Stage0 map since that is a stock map, and you can run any map that doesn't mess with boost control (includes wastegate duty cycle).

For brakes, you can run lighter ones. The requirement is that it has to be equal or larger than the stock dimensions (diameter, width, and number of pistons).

I think you are talking past each other.

In Street (Formerly Stock) you could not touch the map at all. In Street Touring you can run any map that does not change the boost tables.

[Splash]

Street is stricter than that... For example, my car has a total of 3 different maps from Subaru. I am allowed to use any of those 3 in Street Category.

There is no reason for Cobb to create a Stage0 map that is identical to a OEM map, so the implication comes with that there is something different about it, and that something would make it illegal in Street. If it was no different from what you have, why would you use it?

My bad on the brakes, I should know better, I have Girodisc rotors!

For ST*, you can't change the boost or wastegate duty cycle tables. This typically where inducing boost creep comes in.

[justint5387]

Originally Posted by Splash

Street is stricter than that... For example, my car has a total of 3 different maps from Subaru. I am allowed to use any of those 3 in Street Category.

I misread your post. I read street as street touring.

Nvm, subaru maps only for street.

[Subaru8six]

Great post, I am going to have to share this.

[A Guy with a STi]

I was wondering if you guys could help me out in classing my car. I'm just joining for fun and don't expect to be competitive but I also don't want to potentially screw anyone chasing points. I know GC's get classed as SM with a wrx/STi swap but what about the forester with a wrx swap? They did come with a 2.0 turbo in japan but I wasn't clear if it had to be a motor within the same model line or it could be any motor in the Subaru line up.

SM or Prepared? Deets:
01 Forester L
03 WRX swap - Cobb stage 2
Rear seats removed
Body spacers removed (does this effect geometry rule?)
STi rear subframe/ wrx front
L&E Steering quickener
SG9 LCA w/ stock rear mount

[subydude]

The only thing in that list that wouldn't be SM legal is the rear subframe, but because it doesn't do anything and no one will care I'd say run SM.

The easiest way to explain it is all cars that have engine swaps to something other than what they came with go to SM. There are caveats, but they don't matter in this case.

[A Guy with a STi]

Originally Posted by subydude

The only thing in that list that wouldn't be SM legal is the rear subframe, but because it doesn't do anything and no one will care I'd say run SM.

The easiest way to explain it is all cars that have engine swaps to something other than what they came with go to SM. There are caveats, but they don't matter in this case.

Yea, I was wondering about the rear subs because I would assume its about the same weight as the original forester parts, but not sure if the lateral pick up points are any different. Welp, the only other thing I'm really iffy on is the body to subframe spacer removal because it changes the fozz to gc/wrx geometry. However, I'm just learning now so I guess its not a big to do either, SM it is! Thanks for the help Subydude!

[subydude]

Originally Posted by A Guy with a STi

Yea, I was wondering about the rear subs because I would assume its about the same weight as the original forester parts, but not sure if the lateral pick up points are any different. Welp, the only other thing I'm really iffy on is the body to subframe spacer removal because it changes the fozz to gc/wrx geometry. However, I'm just learning now so I guess its not a big to do either, SM it is! Thanks for the help Subydude!

The spacers are part of the struts which are open in SM so no worries there. The SMAC actually recently clarified that the entire top of the strut tower is open now so removing those spacers are definitely legal.