Originally, I was just going to build my car with whatever parts filled my fancy and Class into Street Modified (per SCCA). However, I think it will be more fun for me (and competitive) to class into BSP. It also gives me a more defined goal for modifications and will limit my expenditures. Currently, I am a novice and am trying to figure out what modifications I want to do for next year.

One modification that I would like clarity on is the Roll Center Adjustment Kit. I can not find anywhere in the Street Prepared Category that would be referencing this modification. I vaguely remember reading a while back that the RCA would put the car into SM category but search does not bring up anything helpful.

I would also like to have some clarity on the issue of getting a built Rear Differential (such as TRE or shep). The only section that references LSDs is 15.10.R but it does not appear to have anything to do with replacing LSD parts.

Can anyone who runs in BSP class or know the rules well provide clarity on these issue?

Here is a link to the SCCA rules:
http://cms.scca.com/documents/2011%2...lo%20rules.pdf

 

https://www.evolutionm.net/forums/mo...evo-9-8-a.html

You might have better luck looking in the motorsport section

Good luck

 

That thread is awfully old and seems to be based on different rules.

 

https://www.evolutionm.net/forums/mo...iscussion.html

https://www.evolutionm.net/forums/mo...vo-ix-bsp.html

Like I said check out the motorsports section and do some searching

 

The roll center kit is not legal in BSP because it modifies the suspension geometry.

Not sure about the rear diff. If you are trying to limit expenses, BSP might not be for you.

 

I am not that cheap. I was just thinking the other day about how wide open the field was for SM and how much I would have to pay to be anywhere close to competitive. I am actively trying to limit myself to spending less than $500/month on mods and repairs and the BSP class would be something I could work my car towards on that budget.

 

i think your good with the tre lsd. but check

"Limited slip differentials are permitted. This permits locked differentials,
either by design, welding, or mechanical means. Differential
cases, internal differential parts, and axle stubs may be machined as
required for clearance and installation to the extent that material may
only be removed, not added, and the exterior of the case may not be
altered in any way. This machining may serve no other purpose. Any
other modifications or substitutions to accommodate the installation
of the limited slip differential must meet the requirements of 15.1.B
and 15.1.C."

i dont see any exclusions about this, its not an electronic system, its a mechanical diff

 

I do believe TRE makes an 8 plate rear LSD that is STU legal, which should also be legal for BSP. As Jeffroevoix said, check in the motorsports section, those guys will have your answer.

 

I need to read up more on BSP because I was under the assumption this was a very strict class since I wasn't eligible with 255's, coilovers, and 430whp. Also the tech's wouldn't know you have a RCA kit unless they got on their hands and knees and searched for the yellow dust boots which they wont do. I am not saying all of them aren't knowledgable on this subject but I have to go off what I see.

 

Rear diff upgrade is BSP legal, Mr. MR has one in his car. RCK is not BSP legal. Yeah, your right they may never check on a regional scale and you could probably get away with it, but if you went to a National event and someone protested your result, you would be screwed.

PSRS kit is also not legal, in case you were looking at that as well.

RevMoto, 255's are perfectly legal in BSP, STU is limited to a 245 tire.

 

I was put in Street Modified with the mods you see in my sig.

 

because of the porting? Everything else looks legal

 

Mods looks legal to me. I think porting is allowed also, just not any head work.

Revmoto, it depends how serious you are and how competitive you want to be. Abide by the rules, or risk being embarassed by it. Nothing worst than a competitor challenging your mods and having tech go through your whole car. This may not happen at local event becasue most people dont care, but it is something that happens at National and ProSolo tours. Spotting an RCS kit isn't hard, they're bright yellow.

BTW, 255 is legal, but not competitive in BSP. BSP Evos run 285.30.18 Hoosiers.

 

your synapse DV put you in Street mod, not necessarily the porting. Port matching and to some degree porting the head is allowed in SP, basically, you can remove enough material to match the gasket when porting in BSP. It's kind of a grey area you can exploit a little..

 

Not if you put the factory covers on. I play by the rules and openly admit all my mods but I am just curious how you can not get away with some of these upgrades. Ported parts for one are difficult to spot.