2005 PAX factors.
 

SS 0.837 ASP 0.850 AP 0.865 AM 1.000
AS 0.828 BSP 0.839 BP 0.861 BM 0.942
BS 0.821 CSP 0.838 CP 0.855 CM 0.908
CS 0.810 DSP 0.822 DP 0.844 DM 0.879
DS 0.796 ESP 0.826 EP 0.858 EM 0.886
ES 0.806 FSP 0.811 FP 0.862 FM 0.884
FS 0.805 F SAE 0.948
GS 0.782 STS 0.799
HS 0.777 STS2 0.803 F125 0.939
STX 0.802 FJ1 0.781
STU 0.818 FJ2 0.797
SM 0.842 FJ3 0.823
SM2 0.852 FJ4 0.832

WOW! Can;t wait to see street tire factor...STU dropped like a brick, but I think NESP is the way to go for me. STX also took a hit.

Nice! STU is right in there with STX now, that's more like it!

And it's great to see SM and ESP only .02 or so apart! It seems like anyone running an STi in ESP might want to just come on over to SM for fast courses since the boost alone should make up for the PAX difference!

I must say... if I can get a 6-speed in the WRX, and if you STi folks stay in ESP off boost... I may just have a shot at beating you guys in street tire next year! :twisted:

I'll be in SM! 8)

I thought that was where everyone was going to be?

changing your minds?

SM = Catless, I hope

Catless = modified, I thought?

if the rules dont change much from last year I could run ESP without a cat! :D

http://forums.nasioc.com/forums/show...ght=SCCA+Rules

Street Mod definitely requires a catalytic converter. First I heard of SP allowing you to go catless though. Somebody grab the rules off the link in the member's forum and verify this?

Re: 2005 PAX factors.
 

STX took a hit alright. Dean - r u going to stay there?
STU is alot sweeter! That'll be an interesting class to watch in 2005. If I had an STi, I'd probably gravitate to this class next year.

Anyone remember how to compute the street tire pax factor?

Okay, looks liek that is legal... "removal or modification of emission control devices" is permitted, and exhaust is unrestricted. Damn you STi guys.

Re: 2005 PAX factors.
 

Last year it was PAX-.027.

did you get this out of SM or SP?

Street Prepared, section 15. I looked up the PDF file on my laptop.

Re: 2005 PAX factors.
 

Maybe for SM it was -.027. Our street tire modifier is actually an *additional* multiplier of .968. So, take your PAX * .968 and that's your street tire PAX.

Changes are it won't change much (if at all) for this next season. In which case:

Assuming we're all running Street Tire, here's the STU vs. NESP vs. NSM break down:

STU:
+ No brake restrictions
- highest PAX (.818)
- Cat required in exhaust

NESP:
+ lowest PAX (.800)
+ Intercooler mods allowed
+ Unrestricted Exhaust
- No brake mods outside of pads/fluid (I think this mean no SS lines!)

NSM:
+ No brake restrictions
+ Intercooler mods allowed
++ Boost mods allowed
++ Hell, just about every mod, 'cept the ALK allowed!
- Cat required in exhaust
- middle PAX (.815)

So, assuming I'm not missing anything... if you have the money to build up a SM car, you should clean up in PAX this year. Of the alternatives, NESP >> STU... but if you've done SS lines, you might be screwed... we need to double check on the brake rules for SP. But if SS lines aren't allowed, and I already had 'em on my STi, I'd just get a reflash and run in SM.

And anyone w/o a cat planning to run SM (*cough* Mike), you might want to look into getting a flanged cat insert that you can toss in the car for race days, because the alternative (E-Modified) doesn't seem too good. :lol:

Actually it was pax-.027; check out the table.
http://www.renoscca.com/results/2004...%20PAX-RPT.htm

I would prefer the multiplier though, it would give the higher classes a better shot against the F/G Stock armies. :P

I find it funny that ESP is still lower than AS. :lol: By the way... Dean probably just jumped to ESP too, and he'll be able to make his car a tad faster. Dammit, and we in SM had gained a little PAX help too. :(

Why go from STS (.799) to NESP (.800) if you're in a WRX? Tell Dean he'll have to take off the StopTechs. And I'm pretty sure the lack of a cat won't make up for the lag he'd get w/ a new I/C.

Frankly, WRX == STS or NSM. The only think you gain is the cat-less exhaust in NESP.

No, a WRX is STX, .802 this year. And dean might take off the Stoptechs anyway, he thinks the rotational mass tradeoff isn't worth the extra fade resistance, which wasn't a problem before. A JDM or USDM STi top ount will help improve his cooling without introducing measurable lag, and the lack fo a cat will improve spool more than top end power. What I wonder about though, is if you truly can legally remove the cat- you should make more boost without it, reflash or no reflash.

Unless I read something wrong, SM got harder next year.

Whoops, you're right, I was reading the STS PAX and thinking STX... duh! Still, I'd rather keep my SS brake lines over spending $ to buy a new exhaust w/o a cat. .002 PAX can be made up on course by blinking one less time.

Looking it over, almost every class went up- except ESP and STU among the ones that matter to us. :P I Other than those, there wasn't a huge change in relative strengths except STX getting weaker.

2004
STX .795
STU .827
NESP .798
NSM .811

2005
STX .802
STU .818
NESP .800
NSM .815

So everyone got harder 'cept STU. What's important is that everyone's closer together now. Should make for an interesting season in Street Tire this year!

Considering the competition in Street Tire next year... one blink might be the difference. Good point about the SS lines though. Tough call. Removing the cat won't require a new exhaust though, you can just cut and paste a piece of 3" tubing in its place.

I'm actually thinking about doing that for catless track days.

Back to the Nxx competition... I really think that SM is the place to be. Mods are all but unlimited (except for that one cat) and the PAX isn't all that far off from everyone else. The drawback is simply: can I afford to build my car to the rules. There's no reason that my car can't legally put 300awhp down in SM trim... I just can't afford the mods. You NESP STi drivers have the advantage as long as IGT doesn't give me a big raise. :P

$10 says Dean is in an STi before season's end.

I'm pretty happy with the NSM PAX actually. 8) Well, until Dean's STi shows up there...