GS Pax index

Discussion in 'Fiesta ST Autocross' started by AlanBDahl, Apr 8, 2014.

  1. AlanBDahl

    AlanBDahl Active Member

    As many of you know the Rick Ruth PAX index for GS is not kind, giving a smaller street tire adjustment than for other street classes. Our local NWR/SCCA series has responded by using the race tire indexes with a blanket .980 adjustment for all street classes. This helps GS a huge amount. Is everyone else using the unadjusted PAX values or have you fiddled with them too?

    So far our other series is using the RR indexes but is looking at changing to match NWR/SCCA. It makes a huge difference, at the last NWR event I finished 2nd but would have been 6th with the RR indexes.
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  3. conevadr

    conevadr New Member

    Congrats on influencing your local region to implement an appropriate index. I was not able to convince our local Chair that the nationally supplied indexes needed adjusting. Since our Pro class includes some talented non-Street competitors, I've actually considered two ironic options. First to run in our indexed Street/Stock category, or second pick up a set of R-comps even though I've been a road tire competitor for years. I'll probably just run Pro with the extra handicap and focus on having fun, and lobby for next years adjustment.

    George M
  4. AlanBDahl

    AlanBDahl Active Member

    It's not just a street vs non-street issue. SS appears to have been adjusted by RR with an index near .980 while GS was adjusted with something closer to .993 which just doesn't seem right.
  5. conevadr

    conevadr New Member

    Agreed, I actually think that RR did a pretty good job this year with the Stock indexes. But then it seems like adjustments were made on a class by class basis converting to Street. Some of the higher powered Street classes appear to have been given a bit of a break while the AWD, and slower/lighter classes didn't. I would have actually been mostly okay if RR had just published the indexes and said take 'em or leave 'em. But when pushed, he stated that he made "conservative" adjustments for Street given the unknown impact of the new category rules (+-1 inch wheels). His indexes have always been a mixture of art, science and experience, and I'm fine with that, but the target should still be the middle of the range.

    George M
  6. jasyatz

    jasyatz Member

    Our chairs and Chiefs (same 4 guys) talked about it before the season, we're taking a wait and see approach year one. NNJR is one of the regions on Rick's PAX radar, so we don't want to skew the data. We have the RT indexes for SP and Prepared classes for a few years now also, so drivers can index their car on Street Tires no matter what class they run. Crazy thing we found though, BSP on an ST index nets a better PAX than STU. ( so we modified the index just for that class only)
    k757 likes this.
  7. Cligedy

    Cligedy Active Member

    Central Carolina region is sticking with .806 for GS. 2014 is a transition year for street class and a bit of wonkiness is expected for pax this year unfortunately. I hadn't even paid attention to whether that gave us a soft pax. If that is true, then I am especially pleased with how I have been driving this season.
    Smokin likes this.
  8. AlanBDahl

    AlanBDahl Active Member

    .806 is a hard PAX for GS compared to say SS. We're using.796 for GS in NWR/SCCA though it looks likely our WWSCC series may stick with .806. If i was to offer my opinion I'd say that the real number is probably more like .800 so one series is easier than it should be while the other is harder than it should be. Hopefully after a year of running street tires the RR numbers will be a little less conservative next year.
    Cligedy likes this.
  9. Cligedy

    Cligedy Active Member

    I'm just running in open class this year, so this doesn't greatly affect me. Our pro class is deep, with well prepped cars, especially compared to my not prepped car. At the last event I was 3.9 seconds behind the top pax times. An .800 pax would have trimmed a half second off of that.
  10. Mightymango

    Mightymango Active Member

    Our local is sticking with Rick's numbers...which had a lot of people bitching, especially with the stock going to street change. It was decided that no change was going to be done until the 2015 season in terms of PAX numbers.
  11. AlanBDahl

    AlanBDahl Active Member

    If I was smart and could afford another set of wheels/tires I'd probably run with a GSR index on the WWSCC series but I just don't have the money unfortunately.
  12. CrookedRacer

    CrookedRacer Active Member

    Fortunately our GS class is big enough that just winning the class would be pretty neat. Beat those Foci! Who cares about the rest of the event?
  13. Smokin

    Smokin Active Member

    Looks like G-Street was adjusted to 0.988 of G-Stock. Which is pretty abysmal.
    But in saying that I paxed 1.375 secs off a National Champion and a NC place driving in DS and STX.
    A 0.980 factor would have kept me in 9th since 8th was also in GS but would have made me 0.278 closer to first.....
    And looking at my videos I was sloppy...

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