Help me understand classes

[slowdriver]

I was reviewing PAX times in the results for this month, and I have some questions:

1. I see a couple of classes listed our results that don't appear on the PAX/RTP index. Namely, TI, which I believe is TallyImports, and STP-HS. Would I be correct that both of these classes are local to the region? If so, what are their PAXes?

2. When the PAX is calculated, is it an average of all the runs, or only the best run? I've assumed it's the best run that's calculated.

This isn't a call out or anything, I'm just trying to understand how PAX is calculated. For example, one of the cars, #11, Integra in STP-HS, which I believe means lightly modified, seems to have a lower PAX than me when I'm in HS, and his lowest time was higher than my lowest time. If his car is in a higher performance class, shouldn't the PAX be higher?

Can someone explain how this works?

[unFIT2compete]

PAX is a handicap multiplied against your best time so it can be compared across classes. Essentially removing the car from the equation.

TI is a "heads up" class with no PAX. It was decided that their modifications were all over the place and too hard to class. So they are "run what ya brung" racing for bragging rights. PRO, STP, and NOVICE are the only classes that are paxed within for order. They consist of cars from different classes. PRO AND NOVICE group drivers from different ends of the skill spectrum. STP is a class for cars without competion tyres from classes that allow competition tyres. Because STP has the handicap of no race tyres, an added PAX of .975 is added across the board so their times can be compared with other classes.
Stock, Street Prepared, and Modified cars using tyres with 140 treadwear and above can run in STP. They would use the PAX from their original class for comparing times for position within the class.

current PAX: home.comcast.net/~paxrtp/rtp2012.html

[unFIT2compete]

The new for this year National equivalent of STP is the three RT(Road Tire) classes. RTF, RTR, and RTA for Front, Rear, and ALL wheel drive. Though it is only open to stock class cars on non-competition tyres(140+ treadwear).

[slowdriver]

Yeah, I have a basic understanding of how PAX works, but I'm still a little confused about how a car in STP, with a higher lowest real time (confused? ) had a better PAX than me in NOVHS.

My best real time is 58.558, with a NOVHS PAX adjustment of .799. This means that 58.558*.799 = 46.787, which is what's listed in the results.

If the PAX for STPHS is .975, and his lowest real time is 59.276, how is his PAX calculated? Isn't it 59.276*.975 = 57.794 PAX? But his calculated PAX time is listed in the results as 46.177.

Am I misunderstanding something?

[unFIT2compete]

STP as a class has a pax of .975 in addition to whatever pax the original class had. So STP-HS gets the HS pax(.799) and then the STP pax(.975), because the HS pax is based on a car with HS legal upgrades which includes R-compound tyres (usually below 100 treadwear). Cars in STP give up the tyre upgrade and run 140+ treadwear tyres.
Raw time=59.276
HS pax, 59.276 x .799 = 47.361
STP-HS pax, 47.361 x .975 = 46.177

[slowdriver]

Ah! Now I understand. Thank you for breaking that down for me.

Safe to guess that STP-HS is the class I will be in? Running stock with 140+ tires.

[unFIT2compete]

It's your choice. I'd like to see more participation in this class. At some point in the future I will be moving to STF, but until then the more the merrier.

[unFIT2compete]

Have you read the Street Tire Pax class discussion thread? It may offer some more insight.

dixiescca.proboards.com/index.cgi?board=novicedudes&action=display&thread=209

[KelCist]

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