Looking at going r compound next year. Like toyo r888's. If I'm sms now, what is the step up with these tires?

SM or SMF.

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"Captain Plastic"
SCCA Member 401575 - IndySCCA & TRSCCA Dual Region Member
91 Chevy Cavalier Z24 || 92 Honda Accord LX || 11 Kia Forte EX || 05 Chevy Trailblazer EXT 4x4

What are some of the cars that are normaly in that class? Or better yet what is the lowest rating thread wear for street tire? 200? 180?

IndySCCA's SMS class is SCCA's SM (Street Modified) class rules with SCCA's ST (Street Touring) tire rules. In all ST classes, street tires must have a treadwear rating of 140 or greater.

R-Comps are legal in Stock, Street Prepared, Prepared,and Modified classes.

SMF is SM for front wheel drive vehicles.

Does that help?

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Dave "Squadron Leader" Dusterberg
1996 Dodge Neon ITA/FSP #9
2000 Dodge RamVan 1500
2005 Ford Mustang GT
2012 Indy Region SCCA Activities Chair
2010 Indy Region SCCA F Street Prepared Champion
2011 Indy Region SCCA C Street Prepared Champion

to complicate matters..... bias plys ("real" race tires) are legal in prepared and modified, but not Skreet Modified.

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Indy Region SCCA
Member #366286

So I will be ok with a 140 and still be in sms. If so I rather do that.

In short, yes. Here's the current tire rules from SCCA for ST:

14.3 TIRES
Tires must meet the eligibility requirements of the Stock category with
the following additional restrictions:
A. Tires must be mass-produced standard production tires designed
for normal highway use on passenger cars. Low volume and/or specialty
tires will be specifically excluded below.
B. Tires may have section widths up to and including the following:
ST, STS, STR (AWD) – 225 mm
STX (AWD), STU (AWD) – 245 mm
STR (2WD) – 255 mm
STX (2WD) – 265 mm
STU (2WD) – 285 mm
C. Tires must have a minimum UTQG treadwear rating of 140 and a
minimum molded tread depth greater than 7/32” as manufactured.
D. Tire models must not appear on the following list, which may be altered
at any time by the SEB upon notification of the membership.
Pirelli P Zero Corsa

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Dave "Squadron Leader" Dusterberg
1996 Dodge Neon ITA/FSP #9
2000 Dodge RamVan 1500
2005 Ford Mustang GT
2012 Indy Region SCCA Activities Chair
2010 Indy Region SCCA F Street Prepared Champion
2011 Indy Region SCCA C Street Prepared Champion

cool, thanks.

If you go R-compounds, i wouldn't bother with the R888s for autox competition. Dave did/does pretty well on them, but that's also due to it being a small class.

R888s are open track tires. You'll get smoked by the guys running V710s and A6s all day, every day.

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My Escort cost more than your Porsche.

R888's aren't the best R-Comps either but there have been a glut of good used ones out there, that's why my car was on them.

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Dave "Squadron Leader" Dusterberg
1996 Dodge Neon ITA/FSP #9
2000 Dodge RamVan 1500
2005 Ford Mustang GT
2012 Indy Region SCCA Activities Chair
2010 Indy Region SCCA F Street Prepared Champion
2011 Indy Region SCCA C Street Prepared Champion

Yep yep!

I'm hoping i can score a few sets to test n tune with over the winter for that reason. I'd rather tear up a $200 set of take-off R888s than a $1000+ set of A6s dialing the car in.

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My Escort cost more than your Porsche.

...and you would be doing it wrong.

Top tip: Dial in a car on good tires, not crappy ones.

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Indy Region SCCA
Member #366286

Did you expect nothing less?

This thing will require LOTS of dialing, i'm already anticipating sacrificing $1000 worth of A6s at least once either way.

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My Escort cost more than your Porsche.

Well,
1) Making sure everything runs and works properly on crappy tires.... ok.
2) DIALING IN a setup on crappy tires.... pointless.

To me, those are 2 different things entirely.

Things change DRAMATICALLY on good tires. Dial in a setup on crappy tires and you will regret it. Promise.

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Indy Region SCCA
Member #366286

I wonder if I can run SMF in the vette if I do it in reverse?

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Founding Member of the Indiana Chapter of the Teeny Weeny Club for Secure Adult Males

"The Technician"

"can't hit the bottom of a tuna can, but i'll blow out the sides"

Yeah saw a few used sets of r889's. Why I asked.

Couldn't hurt. Your results would be the same.

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Indy Region SCCA
Member #366286

Used R888s will likely be faster than a good set of shaved RS3s or similar. But i wouldn't expect a HUGE margin.

If you're looking local, i'd just stick with street tires and stay in SMS where the local competition is.

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My Escort cost more than your Porsche.

I want to get into road course next year once or twice if I get where I want with it over tbe winter. but mainly autox if its running good. May just dump money on long term set of good streets that I can haul to the track in the trunk. Looking at sets of basset racing steelies. 14x8 in front and 14x7 in back. Cheap track wheels

Why do people shave rs3's anyways........lol. its like saying well, they're soft anyways.....why not take more off to make them softer?

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91 SHO mtx, 3.2L catless, OZ'd, star spec'd......DD
95 SHO mtx - project/garage queen
95 318ti - possible grm $201x entrant...
92 SHO mtx - gawd dammed loch ness monster (parts now)