Street Prepared restructuring?

MarcusMcRae · **Posted:** Tue Nov 21, 2006 11:43 am

David Spratte wrote:

Coulda been worse for GS.

+009

You're getting moved to DS. :nana:

Ryan Holton · **Posted:** Tue Nov 21, 2006 11:45 am

David Spratte wrote:

Shoulda been worse for GS.

+009

Fixed that for ya!

RodneyWright · **Posted:** Tue Nov 21, 2006 11:50 am

haven't done a class by class compare, but STS got bumped as well. 06 was .797 and according to the new list, STS now gets paxed at .805 for 07, a bump of +.008.... that sucks...

Looks like we all have to drive harder now!

Scott Johnson · **Posted:** Tue Nov 21, 2006 11:55 am

Wes Eargle wrote:

Speaking of restructuring, Rick Ruth published his 2007 PAX numbers. The CSP bump makes my hiney hurt.

http://scca-chicago.com/solo/indexes/rtp2007.html

Oh, wah. GS bump = 0.009 What we are really seeing is that AMod got easier (seriously).

Let's consider the cars that run on DOT tires, that is pretty representative of THSCC events.

The median and average index increase is 0.007 for all DOT rubber classes. We're really more interested in percent change though, so for that we see a median and average of 0.842% (all DOT classes got harder).

CSP actually gets 0.835% harder, so yall have it EASIER than the average car running DOT tires. Keep crying that river.

The order of difficulty is actually:
<<<<Harder<<<<<
SM (0.46%), BSP, HS, GS, CS, FSP, STS, SS, SM2, DSP, AS (0.001%)
>>>>Easier>>>>
CSP (-0.006%), DS, ES, BS, ESP, ASP, STS2, STX, FS, STU (-0.72%)

Based on our sites and the results of our drivers, it seems that the STU folks have a decided advantage in all of this!!!

Since GS cars took both the Top Gun and X-Class wins this year, let's compare everything to GS. Let's say the GS cars all run 60.000 seconds, the following chart shows what you have to run in order to tie:

Code:

class   2007   2006
SS   56.816   56.714
AS   57.494   57.329
BS   58.188   57.956
CS   58.613   58.598
DS   59.925   59.699
ES   59.335   59.107
FS   59.555   59.180
GS   60.000   60.000
HS   61.065   61.077
ASP   56.154   55.915
BSP   56.483   56.512
CSP   57.018   56.850
DSP   57.632   57.467
ESP   57.770   57.536
FSP   58.542   58.526
STS   59.851   59.774
STS2   59.777   59.401
STX   59.629   59.254
STU   58.685   58.098
SM   56.285   56.379
SM2   55.893   55.785
XP   55.126   54.885
BP   55.635   55.267
CP   55.764   55.654
DP   56.023   55.850
EP   55.829   55.524
FP   55.507   55.203
GP   56.883   56.445
AM   48.180   47.640
BM   51.038   50.466
CM   53.003   52.409
DM   54.196   53.831
EM   54.812   54.075
FM   54.135   53.709

David Spratte · **Posted:** Tue Nov 21, 2006 12:02 pm

MarcusMcRae wrote:

David Spratte wrote:

Coulda been worse for GS.

+009

You're getting moved to DS. :nana:

I hope not. I think it would be lame to have to put my initials on my car.

Edit: I'm hoping these buy me my .009 back.

Les Davis · **Joined:** Fri Aug 29, 2003 2:04 pm **Posts:** 2059

Michael Westerfield wrote:

Ryan Holton wrote:

Wes Eargle wrote:

Speaking of restructuring, Rick Ruth published his 2007 PAX numbers. The CSP bump makes my hiney hurt.

http://scca-chicago.com/solo/indexes/rtp2007.html

Im guessing it was sponsored by the new James Bond movie

CSP +.007

Suck it up mutha!

SM +.011

Saw that, thats brutal! SM PAX is now higher than SM2 in '06! :shock:

Nice to see SS wasn't spared the brutality +0.008 woot!

MikeWhitney · **Joined:** Wed Aug 20, 2003 9:15 pm **Posts:** 4724

scottjohnson wrote:

Based on our sites and the results of our drivers, it seems that the STU folks have a decided advantage in all of this!!!

I'm thinking that this thread has helped me decide what class I'm going to run next year

Yay camber here I come!

Chuck Branscomb · **Posted:** Tue Nov 21, 2006 12:32 pm

MikeWhitney wrote:

scottjohnson wrote:

Based on our sites and the results of our drivers, it seems that the STU folks have a decided advantage in all of this!!!

I'm thinking that this thread has helped me decide what class I'm going to run next year

Yay camber here I come!

Mike,

I'm thinking the same thing about mods to the 330i (instead of tearing up tires and dealing with a peg leg diff). I think with coilovers, camber plates and a limited slip differential plus buying some 8" rims for the rear, the car would qualify for STX. I think that might be right?

Chuck

Chuck Branscomb · **Posted:** Tue Nov 21, 2006 2:29 pm

Below is shamelessly stolen image from ssscc.org site. I have not checked this for accuracy.

Todd Breakey · **Posted:** Tue Nov 21, 2006 2:53 pm

Along the same lines as what Chuck just posted but maybe in a little easier to digest format. I did this for my site also, so I guess it is stolen from me!!

Here is a quick comparison between this 2007 and 2006 PAX Indecies.

2007 PAX/RTP Index 2006 PAX/RTP Index Difference

SS 0.848 0.840 +.008
AS 0.838 0.831 +.007
BS 0.828 0.822 +.006
CS 0.822 0.813 +.009
DS 0.804 0.798 +.006
ES 0.812 0.806 +.006
FS 0.809 0.805 +.004
GS 0.803 0.794 +.009
HS 0.789 0.780 +.009
ASP 0.858 0.852 +.006
BSP 0.853 0.843 +.010
CSP 0.845 0.838 +.007
DSP 0.836 0.829 +.007
ESP 0.834 0.828 +.006
FSP 0.823 0.814 +.009
STS 0.805 0.797 +.008
STS2 0.806 0.802 +.004
STX 0.808 0.804 +.004
STU 0.821 0.820 +.001
SM 0.856 0.845 +.011
SM2 0.862 0.854 +.008
XP 0.874 0.868 +.006
BP 0.866 0.862 +.004
CP 0.864 0.856 +.008
DP 0.860 0.853 +.007
EP 0.863 0.858 +.005
FP 0.868 0.863 +.005
GP 0.847 0.844 +.003

Scott Johnson · **Posted:** Tue Nov 21, 2006 3:03 pm

the problem with taking an absolute difference between two numbers is that it doesn't reflect the fact the starting numbers are all different magnitudes. HS and GS both have a difference of 0.009, but that is a bigger % change for HS.

Richard Casto · **Posted:** Tue Nov 21, 2006 6:09 pm

I did some quick analysis of my own. I came up with some results similar to what Chuck's graph shows. It also ranks in the same order as Scott's "harder and easier". So 'SM' got the shaft, 'STU' come out smelling like roses.

A positive number is a "looser" and a negative number is a "winner". Basically a looser has a harder PAX when you take into account the average change across everyone. I calculated this in this way (I am not a statistician)...

(2007 Class PAX - 2007 Avg PAX) - (2006 Class PAX - 2006 Avg PAX)

It is interesting, that this generated banding of classes with the same calculated factor.

0.0083 FJ4 (FJA)
0.0053 SM
0.0043 BSP
0.0033 HS
0.0033 FJ1
0.0033 GS
0.0033 CS
0.0033 FSP
0.0033 F125
0.0023 STS
0.0023 SS
0.0023 SM2
0.0023 CP
0.0013 DSP
0.0013 AS
0.0013 CSP
0.0013 DP
0.0003 DS
0.0003 ES
0.0003 BS
0.0003 ESP
0.0003 ASP
0.0003 XP
-0.0007 EP
-0.0007 FP
-0.0017 FJ2
-0.0017 STS2
-0.0017 STX
-0.0017 FS
-0.0017 BP
-0.0017 DM
-0.0027 FJ3 (FJB)
-0.0027 GP
-0.0027 FM
-0.0047 STU
-0.0047 FSAE
-0.0057 CM
-0.0057 BM
-0.0057 AM
-0.0077 EM

Keith Vail · **Posted:** Mon Nov 27, 2006 11:48 am

MikeWhitney wrote:

scottjohnson wrote:

Based on our sites and the results of our drivers, it seems that the STU folks have a decided advantage in all of this!!!

I'm thinking that this thread has helped me decide what class I'm going to run next year

Yay camber here I come!

Well after the experience I had this past weekend in another Miata prepped for another class and after looking at Pax I might have found my class for 2007. Street tires here I come.

Matt McGrain · **Posted:** Mon Nov 27, 2006 1:40 pm

MarcusMcRae wrote:

David Spratte wrote:

Coulda been worse for GS.

+009

You're getting moved to DS. :nana:

The Mini's should be. Hell, us DS guys have a tough enough time beating the GS times at most events.

Kevin Allen · **Joined:** Thu Aug 28, 2003 6:42 pm **Posts:** 3479

Oh, let me add my analysis to all this geekiness!!!

Indexed Results in 2007

1...Kevin Allen......Subaru STi....STU 99
2...Mike Whitney...BMW M3........STU 32
3.&upward Everyone else...Buncha sucky cars in other classes

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