THSCC Forums

STi teflon/stainless steel braided clutch line - installed because the stock rubber line falls apart eventually and clogs up the slave cylinder, causing the pedal to stick halfway up. Not fun.

DSP? or SM?

Upgraded rear differential mounts (STi Group N, hard rubber) would be SM, no?

Upgraded steering rack bushings - polyurethane. SM? or something higher?

Also, shimming the steering rack to drop it down a few mm. SM? or something higher?

Now that the fun of competition has been beaten from my brain, I'm thinking about just modifying the car however I want, and making it more fun to drive... but also want to avoid being in the wrong autox class, of course!

Oh, yeah - and can somebody please change it to, "Dirtier than most" so people won't think I'm the retard who misspelled it?

From what I understand about the various mounts is that the ratio of metal to non metal must stay the same but the non metal can be any material, rubber, poly, etc. I could be wrong and if so I am sure I will corrected soon enough

Legal as any clutch and actuation mechanism is allowed.



Legal now, thanks to the BSP Corvette ruling. (unless I'm seriously mistaken)



Unfortunately Prepared/Mod/Street Mod only. I wanted to do the same on my old FSP Scirocco and couldn't.



Well there has been a lot of argument about this on the SM boards over the last year. Based on the Fastrack I just read it looks like you can install longer/shorter tie rod ends but can't shim the rack. I could be mistaken though...

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2003 WRX (again!)

Thanks, Kevin. Not sure I'm going to monkey around with the steering rack, so it looks like it's still DSP, so far. (right?) I guess I'll leave the steering rack alone until I decide whether I'm replacing the cams...

Also, from the rules (2002 vintage) listed on the moutons site:



Does this mean I can modify the stuff inside the fuel tank to avoid fuel starvation with a half tank? I'll have to go back and look at the directions again, but I think it involved bending a return line to spray onto the pump, and modifying a tray to keep sloshing minimal. Sure would be nice to not have to fill up the tank every time I want to go play.

Unless you install a GCR legal fuel cell (big $$$) you can not add baffles to the tank or modify it in any way. You *can* change the pump and the lines, but there have been protests there in the past as well (imagine a 2" diameter fuel line between the tank and the pump, and you can imagine the protest).

Even street mod restricts the changes on the gas tank (otherwise I would have already welded in a sump.

You can rip out the EFI for street prepared, cabs have their own sump built in....

Scott

Well, it's SM, now - installed the steering rack bushings last night. Very nice! No wasted movement at center now, just turns as soon as I twitch the wheel. Now I just need to get a WRX steering wheel (smaller diameter than mine) and one of those 12.5:1 steering racks... (not anytime soon! - major $)

Oh, and I also installed the rear diff bushings - the ones that fit in the mounts out at the jacking point. (I haven't touched the ones at the rear of the diff, yet.) Definitely makes a difference - doesn't "thunk" anymore on shifts, just solid - but it also whines like a tractor when decelerating above 4krpm and below 2500rpm. No noises when accelerating or just cruising, though, so it's not a huge deal.

Next project: swapping out the brake booster for a single-stage booster. Been looking forward to this one...


Scott - when you said



did you mean that I'm not allowed to do it period, or it's just not legal for a certain class?

Under the Street Prepared Rules 14.2 Item H-

A GCR Compliant fuel cell may be added-
Tank capacity cant differ more than 20% of OEM
Must be mounted no more than 6 inches from the stock tank in any direction

Its the baffling of the stock tank that gets you put into prepared or mod. Bummer, my POS fuel starves in left handers

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02 Focus SVT
STF 9

Yeah, mine starves in right-handers with over half a tank. Not a problem for autox, since I can just fill up right before. But it's hard to keep the tank full ALL THE TIME...

Here's the statement from SCCA Street Mod Rules:

18.3. OTHER
Due to the inherent creative nature of this category of classes and the resulting member questions about the intent and interpretation of the rules, the SEB will issue clarifying Tech Bulletins in SportsCar magazine on an as-needed basis. Car constructors are cautioned against overly creative or tortured interpretations of these rules. When in question, contact the SCCA National Office for a clarification.

SP rules are pretty clearly stated in the 2003 book. They have been clarified and re-claified to the max over the years. If you are developing a car for SP classing, and you can't find an allowance for the mod you are contemplating, it is clearly not allowed.

Street Mod homogulations, however, are still in the development stage, it appears. So, if you really need to know if something is permissable, a phone call to SCCA would be in order. They will be able to give you a definitive answer.

It's early. My $.02 worth.

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Brad

Well, I found out that the best fix (for my car) is to replace the stock pump with the STi pump and extend the return line, and that would be DSP-legal, which means it would be SM-legal, too.