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Thread: Street R Category

  1. #1

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    Default Street R Category

    So while perusing the SCCA Solo Rule Book, I noticed there is a Street R Category. The only difference I can discern from Street (stock) Class is there is no limitation on the tires you can use. They seem to have amended a couple of other sections but I couldn't see the difference right away. So if I understand this right, you could run a stock ZX2 with street tires in HS and then slap on some R comp tires and compete in HSR. I find this "new" class interesting. Discussion?

    I am referencing the 2014 SCCA Solo Rule Book : pg 179. The Street Class rules start on pg 69.
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  2. #2

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    street is replacing the old stock class. the rules have changed a little. there's still changes being made...like the +/- 1" diameter rule in wheels. for now, 140 treadwear and up is acceptable for use in street, and DOT rated R compound tires (not any tire...true slicks are still only legal at the prepared and modified level) puts you in the "R" category. eventually, the TW limit will be upped to 200 for street tires. the R class was created because a lot of people in the higher horsepower stock classes (think corvettes in SS and AS, mustangs in FS, etc.) said their cars are complete crap on street tires with stock suspension. having a street and street R class appeased some of those people. in the lower power classes (ES, DS, GS, HS) R compound tires don't have *as much* advantage over street tires...so most people are just going with street tires. the modern crop of street tires are actually very close to R compound tires from 15-20 years ago.

    another complaint by the higher power classes...it's hard to get street tires in their sizes...or, they are just as expensive/last just as long as R comps...and keeping price of autoX competition in the "entry" level that stock provided was the biggest reason for the change.

    i'd suggest staying on street tires for your first few seasons of autoX anyway. they amplify your mistakes, so you get better. R comps will mask your mistakes and you'll never learn to correct them. and they are more forgiving. R comps flat spot and the shoulders wear quite fast if you are too aggressive on them or don't have the car set up right with enough camber.

    but if you ever did want to try R comps...i have those 4 Hoosiers you could have for $100
    2000 S/R FSP build: APC shift knob, LED tails, zx2 sticker on the rear bumper, Silverstar headlights, blue spark plug wires, optima red top battery, Magnaflow muffler, and some lowering springs.

  3. #3

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    Like I said, I would need to get some other wheels to run those on. I already have two full sets of wheels/tires for my car and a set and a half for the wife's Z. Maybe once I get the rest of the car set up, we can talk.

  4. #4

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    For doin a kick ass job on my v/c - blue_2001 so you can forget about your sore balls! - 2000zx2chik Heres a sammich - Duffurban36 Its your birthday , heres a cookie - Alwayssideways No Message - 00escortowner 
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    hopefully i'll have them sold by then. if you plan on running stock class, you'd have to ditch the wing (maybe get another trunk for race day) and run stock suspension (except shocks can be aftermarket), stock exhaust (catbacks are legal, but you have to have stock header and cat), and stock intake. otherwise, if you do an intake, suspension, etc you'd be in street touring, which is where i started.

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    I have the hotshot intake. I am also on Eibachs on the front, lower tie bar on the front, front strut tower bar, S/R pcm, 19mm RSB. I have the FR Coilovers, pacesetter shorty header and Vit Tune to put on the car yet. I like the way my car is set up now so I am definitely in ST. No looking back now.

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