ProperOne

I did a quick search and aside from a few comments here and there.. Street preparation is still slightly ambiguous. Basically what I did was check for RTR experiences but the results were minimal as most people simply had switched tires from Stock-class cars and rolled out into the broad-spectrum of Road Tire.

However, a few things are changing. For CRs it seems the 275/40/17 "rule" will disappear and for non-CRs the "shoulda bought a CR rule" might disappear. Maybe.

I just bought my S2000 (non-CR AP2) and previously set sub-par local times in my STX E36. It was limited on prep.. but I suck too so.. While I doubt I'll make it to Nationals.. maybe I'll hit a local tour next year and round up last place. I figured it may be time to open discussion about what may or may not work with the slightly changed ruleset. Whether or not it will matter in the end is still debatable, I can concede that. How much it will personally effect me is nil as I will basically be only on the local level. I have done course walks with Jadrice in the past, hopefully he can be extra helpful now with my similar platform.

Anyways, 5 minutes of searching will render the top 4 swaybars -- Gendron, Saner/Moddiction, ARE, and Comptech. Especially in non-CR cars, the front bar has to be overdose-on-Viagra stiff (priaprism). Does anyone (RTR guys) think the requisite stiffness of the bar will change once dedicated to only street tires?

245/255... 255/255 -- speculation I know but from experience, what will most likely emerge as the new "standard"?

I'm basically asking heavy RTR participants to share their experience.

CKit

235/235 Toyo R1Rs for 2014 before they get treadwear excluded?
Definitely softer FSB than before, but will depend on your alignment, shocks and tire stagger.
I think the Ankeny blade bar might be a good choice for versatility.

iamxpl

I started in RTR and this is my first year of autocross.

Tires

Street tires on stock size wheels 255 (my set up is 245 f 255 r) is the norm and from what i see is the optimal size to run. due to the fact that our front ap2 wheels are 7" wide. going any further than 255 will cause too much of a pinch. i have yet to find evidence that larger tires have proven better.

as far as the bar is concerned i think a Saner bar will be more than enough for the RTR class. i chose gendron since i had plans to move up to STR the following year and prefer that i have some room to tinker around and adjust. i currently have it set to 3/6 setting closest to the softest side. i felt some understeer going into some very tight turns, but was a major improvement on slaloms and sweepers over the stock.

i am in no way a national level competitor but i am within top half of RTR in my local region most of the times. i will get more information after this weekend since i will have a more competent drive as a co driver with me so i can def get some good information.

my target in RTR was a CR with 255 squared set up and we are seperated by a .10 or smaller. the consistent top dog in our local RT class is a cayman S driven by Andrew Kessel. i believe he won the RT tour class before. he was a second faster in the last event, he ran a 45.xx and i was 46.092. if i was better im sure it would have been a closer gap.

and of course we have to consider pax times, the miatas are quite formidable.

iamxpl

wow really ? 235 235? can you please educate me on this particular choice in size?

03threefiftyz

It's a pixie dust toyo....

iamxpl

pardon me for my ignorance, im n00b. what do you mean by pixie dust toyo?

ProperOne

Most R1Rs are constructed in a manner that produces two separate and different layers of rubber. Basically.. they'll crap out after a little while. Certain sizes are not.. most popular is the 195/50/15 sizing in STC/STS (those special sizes are "pixie dust" since they're special, in a sense)

iamxpl

ah! duly noted good sirs.

IntegraR0064

You can take a 235 toyo and squish into it with your finger. And anyway the Toyo has soft sidewalls so running a narrower size gives better response. Bunch of people have had good luck with it. Jeff Hurst is running them now, go stick your finger on his tires sometime. Or Eric Simmons in his clubsport miata. They should be both be at NNJR this weekend.

It does hurt your gearing a little compared to a bigger tire which might be a factor in RTR in an AP2.

Forcednduckshn

You won't be racing a CR in B-Street anyway, the CR won't be classed with the non-CR AP2's, so don't worry about that particular issue. I would be more concerned with the other cars classed in B-street, personally.

Not much to add as everyone else has covered the responses - but I'll say that you will likely want to go with the non-monster Gendron bar. It is smaller/less stiff, making each adjustment hole more a fine tune in the range that you will need it. I think the 3/6 setting on the monster bar with street tires is probably the way to go if you already have that bar. As it stands right now, with my Koni Yellows on the CR 275x4 A6's, the 4/6 setting on the monster bar is the best, but actually is still a little more than ideal, with a little push in low speed/smaller radius corners. With better shocks like a Moton where you can get spring rate from Nitrogen pressue, 3/6 would probably be fantastic. As it stands, the lower grip/lower roll from the narrrower and less grippy street tires would probably make 3/6 on the monster bar just about perfect.

Cheers,