2009 SCCA Solo

Xaeryan · 04-20-2009, 09:39 PM

In deciding on what SCCA Solo class to compete in (while awaiting my 135i!), I came up with a handy chart of class modifications I'd like to share with you all (which includes many common 135i modifications):

http://goo.gl/qoJBQ

This chart should not be your definitive guide, but rather a first-draft; once you decide on a class using it, read the rulebook closely (get a copy here: http://www.scca.com/downloads) to make sure no modifications you have fall into any exceptions.

I interpreted the rules as best as I could, please correct me if I am wrong on anything. Particularly if you plan on competing in Nationals, always err on the conservative side for any gray areas and assume the modification is illegal until clarified otherwise.

Comments/suggestions/corrections appreciated. If you see parts that are not listed you think should be, let me know.

Happy racing!

lib · 04-20-2009, 09:58 PM

Thanks

wolfson.tyler · 05-18-2009, 08:12 PM

very helpful thanks a lot

Xaeryan · 03-29-2010, 06:29 PM

Updated to 2010 specs, added more 135i specific mods, fixed some incorrect interpretations.
Any rule interpretation experts care to clear up the few I'm still unsure of?

cpt97m3 · 03-29-2010, 09:41 PM

SM allows full metal bearings/bushings. Totally free as long as it bolts to the OE chassis pickup points.

cpt97m3 · 03-29-2010, 09:44 PM

Also, STU does not restrict the wheel offset like in stock.

Xaeryan · 03-30-2010, 08:20 AM

Quote:

Originally Posted by cpt97m3

SM allows full metal bearings/bushings. Totally free as long as it bolts to the OE chassis pickup points.

Cool, to be updated. Thanks!

Quote:

Originally Posted by cpt97m3

Also, STU does not restrict the wheel offset like in stock.

Yes, I have that listed for the wheels. For the spacers, however, I couldn't find anything explicitly saying the allowable offset, so I defaulted to the stock rules.
However, I believe it would be safe to say the following: if the wheel offset is unlimited, the spacer offset should be unlimited as well.
I will change that one later on, thanks for catching it!

nordique14 · 03-30-2010, 12:08 PM

lol @ the clutch delay valve moving you from stock directly to SM. Sure would be competitive in SM with a stock 135i with only a missing clutch delay valve.

RaceTime · 03-30-2010, 12:38 PM

Really cool! Nicely done!

RaceTime · 03-30-2010, 12:48 PM

Oh, I believe that an air intake is legal in BSP...if not I have been running illegally. I reviewed the rules and I believe they are OK...

cpt97m3 · 03-31-2010, 12:31 AM

Quote:

Originally Posted by RaceTime

Oh, I believe that an air intake is legal in BSP...if not I have been running illegally. I reviewed the rules and I believe they are OK...

That's correct, air intake is legal in BSP.

Amalfitano · 03-31-2010, 10:13 AM

In comparing the Indexes, something really jumped out at me...

the 335i is F-Stock as opposed to our D-Stock 1.

If say the target is 55 RTP in open street tire, our 1's 60.6 second time is equal to a 3's 59.7. Sure the 1 is soft up front but is the geometry that much different for the class jump? In either case both go the STU, BSP route, and in the end you're basically going against your own class, but i'll definitely be open street tire stock for this year at the least.

Also sort of strange that the 128 and 135 stay the same class...

Xaeryan · 03-31-2010, 06:49 PM

Quote:

Originally Posted by nordique14

lol @ the clutch delay valve moving you from stock directly to SM. Sure would be competitive in SM with a stock 135i with only a missing clutch delay valve.

I'm confident nobody would care if you did a CDV until we are talking about Nationals competition level, but yeah nothing explicitly states you can modify the clutch system other than discs/flywheels in BSP.

Quote:

Originally Posted by RaceTime

Oh, I believe that an air intake is legal in BSP...if not I have been running illegally. I reviewed the rules and I believe they are OK...

Yes, since it is legal in street touring, you are correct that it would be legal in street prepared. To fix...

Xaeryan · 08-31-2010, 11:54 PM

Updated and bumped for those who might need it.
As discovered in TIS, alignment pin removal is listed in factory manual, so go for it all you D-Stockers!

Here's the TIS page with it listed: http://www.1addicts.com/forums/showp...7&postcount=16

04-20-2009, 09:39 PM	#1
Xaeryan Lieutenant 38 Rep 566 Posts Drives: Sideways mostly Join Date: Apr 2009 Location: Hazleton, PA iTrader: (4)	2010 SCCA Solo - Chart of Modifications by Class In deciding on what SCCA Solo class to compete in (while awaiting my 135i!), I came up with a handy chart of class modifications I'd like to share with you all (which includes many common 135i modifications): http://goo.gl/qoJBQ This chart should not be your definitive guide, but rather a first-draft; once you decide on a class using it, read the rulebook closely (get a copy here: http://www.scca.com/downloads) to make sure no modifications you have fall into any exceptions. I interpreted the rules as best as I could, please correct me if I am wrong on anything. Particularly if you plan on competing in Nationals, always err on the conservative side for any gray areas and assume the modification is illegal until clarified otherwise. Comments/suggestions/corrections appreciated. If you see parts that are not listed you think should be, let me know. Happy racing! __________________ 2014 SCCA Solo - Modifications by Class listing Last edited by Xaeryan; 06-09-2012 at 01:03 AM..
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04-20-2009, 09:58 PM	#2
lib Major 141 Rep 1,401 Posts Drives: <This space for rent> Join Date: Apr 2008 Location: ATX iTrader: (0)	Thanks
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05-18-2009, 08:12 PM	#3
wolfson.tyler Private First Class 12 Rep 108 Posts Drives: Join Date: May 2008 iTrader: (0)	very helpful thanks a lot
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03-29-2010, 06:29 PM	#4
Xaeryan Lieutenant 38 Rep 566 Posts Drives: Sideways mostly Join Date: Apr 2009 Location: Hazleton, PA iTrader: (4)	2010 SCCA Solo - Chart of Modifications by Class Updated to 2010 specs, added more 135i specific mods, fixed some incorrect interpretations. Any rule interpretation experts care to clear up the few I'm still unsure of? __________________ 2014 SCCA Solo - Modifications by Class listing
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03-29-2010, 09:41 PM	#5
cpt97m3 AutoXer 34 Rep 683 Posts Drives: 2009 135i Join Date: Apr 2008 Location: So Cal iTrader: (2)	SM allows full metal bearings/bushings. Totally free as long as it bolts to the OE chassis pickup points. __________________ 2009 135i, Alpine White, 6MT, M-Sport, iDrive, iPod/USB, Heated Seats, Premium Sound, BMW Assist
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03-29-2010, 09:44 PM	#6
cpt97m3 AutoXer 34 Rep 683 Posts Drives: 2009 135i Join Date: Apr 2008 Location: So Cal iTrader: (2)	Also, STU does not restrict the wheel offset like in stock. __________________ 2009 135i, Alpine White, 6MT, M-Sport, iDrive, iPod/USB, Heated Seats, Premium Sound, BMW Assist
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03-30-2010, 12:08 PM	#8
nordique14 Major 53 Rep 1,477 Posts Drives: SGM 135i 'vert Join Date: Feb 2008 Location: Sharks Territory iTrader: (5)	lol @ the clutch delay valve moving you from stock directly to SM. Sure would be competitive in SM with a stock 135i with only a missing clutch delay valve.
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03-30-2010, 12:38 PM	#9
RaceTime Auto X'er 3 Rep 157 Posts Drives: 2009 Space Gray 135i Join Date: Jul 2009 Location: Northern Colorado iTrader: (0)	Really cool! Nicely done! __________________ 2009 135i SGM, Premium, Sports, Nav. Dinan Stage 2 software, Injen intake, RR Oil Catch Can, H&R Pro-coilovers and springs, H&R front sway bar, Vorshlag camber plates, Vorshlag comp studs, BMW strut brace, BMW performance pedals, G-Force harneses, BMP tow hooks, Breyton GTS-R wheels with 255-35R18 (square set up) and custom axel back exhaust with muffler delete.
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03-30-2010, 12:48 PM	#10
RaceTime Auto X'er 3 Rep 157 Posts Drives: 2009 Space Gray 135i Join Date: Jul 2009 Location: Northern Colorado iTrader: (0)	Oh, I believe that an air intake is legal in BSP...if not I have been running illegally. I reviewed the rules and I believe they are OK... __________________ 2009 135i SGM, Premium, Sports, Nav. Dinan Stage 2 software, Injen intake, RR Oil Catch Can, H&R Pro-coilovers and springs, H&R front sway bar, Vorshlag camber plates, Vorshlag comp studs, BMW strut brace, BMW performance pedals, G-Force harneses, BMP tow hooks, Breyton GTS-R wheels with 255-35R18 (square set up) and custom axel back exhaust with muffler delete.
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03-31-2010, 10:13 AM	#12
Amalfitano Second Lieutenant 15 Rep 269 Posts Drives: 2009 135i STEP, Future //M2012 Join Date: Jan 2010 Location: Chicago iTrader: (1) Garage List 2009 135i [0.00]	In comparing the Indexes, something really jumped out at me... the 335i is F-Stock as opposed to our D-Stock 1. If say the target is 55 RTP in open street tire, our 1's 60.6 second time is equal to a 3's 59.7. Sure the 1 is soft up front but is the geometry that much different for the class jump? In either case both go the STU, BSP route, and in the end you're basically going against your own class, but i'll definitely be open street tire stock for this year at the least. Also sort of strange that the 128 and 135 stay the same class...
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08-31-2010, 11:54 PM	#14
Xaeryan Lieutenant 38 Rep 566 Posts Drives: Sideways mostly Join Date: Apr 2009 Location: Hazleton, PA iTrader: (4)	Updated and bumped for those who might need it. As discovered in TIS, alignment pin removal is listed in factory manual, so go for it all you D-Stockers! Here's the TIS page with it listed: http://www.1addicts.com/forums/showp...7&postcount=16 __________________ 2014 SCCA Solo - Modifications by Class listing
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