(2009) NCC Autocross Event #4 - July 11 @ Summit Point Motorsports Park

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Originally Posted by Car54

Woody,

The non-BMW category's threshold for R-comp vs. Street tire is 210 treadwear. That puts most extreme summer tires into R-comp class.

XS - Non-BMW's w/ 210+ treadwear rating tires.

XR - Non-BMW's w/ no tire restrictions.

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Originally Posted by woodym3

Wow. When where did that crazy rule come from?

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lol, sorry...didn't see the responses before I posted mine :rolleyes:

on another topic, I noticed that the online signup asked for preferred car numbers/2nd choice/etc (I don't remember it asking this last time, but could be wrong).

Does this mean that we will be able to use our own numbers, or will it still be sequential like at the #2 event that I was at?

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Originally Posted by irish44j

on another topic, I noticed that the online signup asked for preferred car numbers/2nd choice/etc (I don't remember it asking this last time, but could be wrong).

Does this mean that we will be able to use our own numbers, or will it still be sequential like at the #2 event that I was at?

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As long as someone didn't request the numbers before you, then you will be assigned one of your requested numbers.

I'll post a list later today with the numbers.

Here's the list with numbers, as promised.

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Originally Posted by Car54

Woody,

The non-BMW category's threshold for R-comp vs. Street tire is 210 treadwear. That puts most extreme summer tires into R-comp class.

XS - Non-BMW's w/ 210+ treadwear rating tires.

XR - Non-BMW's w/ no tire restrictions.

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The Mazdaspeed3 comes stock with Bridgestone Potenza RE-050As which are considered "Max Performance" by Tire Rack. They also apparently have a 140 treadwear rating...does this put me into XR with people that have R-comps?

If so, I guess I have to change classes.

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Originally Posted by mcoupemindy

Here's the list with numbers, as promised.

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Just FYI if it matters, the very first person; Emir, has a 2009 330ci listed....it's ...uh... kinda impossible :biggrin:

Just if you cared ;) and looking forward for the 11th, and it seems like a lot less people on this one than previous? Like half? Or will it get more people when the time gets closer?

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Originally Posted by RedMS3

The Mazdaspeed3 comes stock with Bridgestone Potenza RE-050As which are considered "Max Performance" by Tire Rack. They also apparently have a 140 treadwear rating...does this put me into XR with people that have R-comps?

If so, I guess I have to change classes.

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yup.......but you'll also be in there with me, who doesn't have r-comps :mad:

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Originally Posted by mcoupemindy

As long as someone didn't request the numbers before you, then you will be assigned one of your requested numbers.

I'll post a list later today with the numbers.

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thx....well at least I got the last 2 digits :)

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Originally Posted by irish44j

yup.......but you'll also be in there with me, who doesn't have r-comps :mad:

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Can't say I'm happy. I have a set of wheels for my previous car that have Falken RT-615s and their treadwear is 200. They felt a lot stickier than the Potenza RE-050As that come stock on the Mazdaspeed3.

Just to throw a wrench in, I noticed this on the Boston Chapter BMWCCA:

"We use an empirically-derived performance-based points system for BMW cars. We follow SCCA rules for Non-BMW classes. Cars equipped with race tires (tread wear rating < 140) run in R-comp classes."

http://www.boston-bmwcca.org/EventDe...oss-rules.aspx

Anyway we can start a mutiny? :tongue:

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Originally Posted by mcoupemindy

Here's the list with numbers, as promised.

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Can I, Fred Caton driving Mazdaspeed3, get reclassed to XR since my tread wear rating is 140?

Thanks.

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Originally Posted by RedMS3

I have a set of wheels for my previous car that have Falken RT-615s and their treadwear is 200. They felt a lot stickier than the Potenza RE-050As that come stock on the Mazdaspeed3.

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FYI, treadwear ratings are relative and only applicable to product lines from a given manufacturer and not across manufacturers.

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Originally Posted by AG

FYI, treadwear ratings are relative and only applicable to product lines from a given manufacturer and not across manufacturers.

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That's what I was reading, too. Which leads to the question, is it possible for stickier tires to make their way into XS simply because of the tread wear rating cutoff?

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Originally Posted by RedMS3

That's what I was reading, too. Which leads to the question, is it possible for stickier tires to make their way into XS simply because of the tread wear rating cutoff?

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sure....there are sticky tires with treadwear over 210. But over 210 treadwear, the tread blocks are usually taller and give more squirm.

That said, one can always take a 210+ treadwear tire and shave it. that's what I did with my Hankooks on a previous car...

Quote:

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Originally Posted by RedMS3

Can't say I'm happy. I have a set of wheels for my previous car that have Falken RT-615s and their treadwear is 200. They felt a lot stickier than the Potenza RE-050As that come stock on the Mazdaspeed3.

Just to throw a wrench in, I noticed this on the Boston Chapter BMWCCA:

"We use an empirically-derived performance-based points system for BMW cars. We follow SCCA rules for Non-BMW classes. Cars equipped with race tires (tread wear rating < 140) run in R-comp classes."

http://www.boston-bmwcca.org/EventDe...oss-rules.aspx

Anyway we can start a mutiny? :tongue:

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Well, there is plenty of SCCA/AI availability around here if you want those rules. I like running with NCC so I'll go by their rules. Or you could run CDC, where there is no classing at all and they use a system more like a golf handicap...

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hell, i'm just surprised that the MS3 comes with RE050s....its more or less the same class/price range as my WRX (I know, I shopped between the two) which comes with longer-life SP Sport01s (still a UHP summer tire).

No wonder the MS3 always beats it in the road tests, it has better stock tires :wink:

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Originally Posted by irish44j

Well, there is plenty of SCCA/AI availability around here if you want those rules. I like running with NCC so I'll go by their rules. Or you could run CDC, where there is no classing at all and they use a system more like a golf handicap...

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hell, i'm just surprised that the MS3 comes with RE050s....its more or less the same class/price range as my WRX (I know, I shopped between the two) which comes with longer-life SP Sport01s (still a UHP summer tire).

No wonder the MS3 always beats it in the road tests, it has better stock tires :wink:

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True, just thought I'd point it out since it was another chapter :) I don't mind getting classed into XR. I'm curious as to whether the MX-5 that is current running XR is on stock tires or not, now.


Hey, we have to make up for the lack of AWD ;)