meoneal

ive asked some friends of mine, and 1 says C Stock, the other says B Stock.. so i know someone on Club RX8 will know this answer...

my 2005 rx8 is bone stock. For 2012, is it B Stock, or C Stock??
this is for SCCA Solo. i put a link at bottom to show the event.

Thank You.

http://www.motorsportreg.com/index.c...F283FEB2F6EB27

Arca_ex

iTrader: (10)

http://scca.cdn.racersites.com/prod/...20listings.pdf

Looks like they're lazy and don't have a 2012 stock class reference sheet posted on the official website so I'd go off of that.

meoneal

that list is exactly what i was looking for. thank you

carrrnuttt

Interesting.

Does anyone else think it's inherently unfair that a stock '04 Base and a stock '11 R3 are in the same class?

Does anyone have any insights as to how much advantage the updates on an R3 provides versus any other model?

Arca_ex

iTrader: (10)

All it has performance wise is foam filled front cross members (just like the Series 1 Shinka) and a tad bit better shocks from Bilstein (also just like the Shinka). I think with the different seats and added electronics they're a bit heavier anyways so no, I don't think it's a massive advantage to have an R3.

carrrnuttt

Okay. Thanks for clarifying that.

dmitrik4

iTrader: (5)

All RX-8s are in CS. They were in BS up until a few years ago when some of the Stick classes were re-shuffled, so your friends who say BS are working off old info.

I can't really think of any advantage of an R3 over an '04 base or Sport in an autoX setting.

PedalFaster

If you're truly bone stock, you should run in Road Tire RWD instead of Stock. RTR is limited to street tires, whereas CS allows R-compound tires, so you'll be bringing a gun to a knife fight if you're on street tires in CS.

Edit: It looks like your region calls it simply "Tire".

TeamRX8

iTrader: (25)

The Search Class.

There is nothing inherently unfair about the S1 models beating up on the S2. It is just a reality between true performance and marketing hype.

meoneal

currently as of today, in the ETR SCCA (East Tennesse Region), there is myself and 2 350z pre-registered for the event. Now i havnet ax in a few years, and when i did, it was in a Sentra,, so you can imagine the difference. ETR does have a Tire class, but as i look into it, it shows others in Tire class... such as:

F Stock Camaro Z28, E Street Prepared 2004Subaru Forester, G Stock 1988BMW 325ix, D Stock 2011Subaru Impreza WRX, E Stock 996Mazda Miata

my question is, are all of those cars listed competing for the same prize? i mean, am i really going to up against an awd WRX, OR are each stock class competing in its own respective class?? Im asking the question here cause ETR has their own 'click' of friends in which they tend to bend the rules for 1 another

wrightcomputing

iTrader: (5)

The usual classes for a stock Rx8 is C-Stock however you are better off running in STX as it has a better Pax multiplier. If you don't have race tires then go in STX you can also have a few mods such as coilovers induction exhaust sway bars etc.

dmitrik4

iTrader: (5)

The RT classes are indexed classes, and most regions split them up according to the National system: RTR (rwd), RTA (awd), RTF (fwd). Under that arrangement, you're competing directly w/ the Camaro, Miata, and BMW.

Some regions don't have enough competitors to do that; your best bet is asking the ETR folks.

So while you're competing against the other cars in the RT class, you aren't doing it on straight time; instead you're doing it on PAX time. So in your case your time will be multiplied by your CS PAX (0.833) and the FS Camaro's time will be multiplied by the FS PAX (0.825). Note that the FS factor is lower b/c FS is a "slower" class.

Example:

Your raw time: 50.2 seconds. 50.2 * .833 = 41.816
Camaro raw time: 50.9 seconds. 50.9 * .825 = 41.993

You win. But if you both run a 50.2, he wins (41.8 to 41.4).

There may be (likely is) another "RT" multiplier (.975 or something) that tries to index the RT classes against the "regular" classes for the overall PAX results.

meoneal

thanks for the tips and info everyone... the event is less than 12hrs away at Bristol Motor Speedway.. i'll see if the 350z's im competing against are using Rcomps,, cause i think if they are using street tires, I think i can take em, w00t

BigT4203

iTrader: (1)

RX-8 run in CS, though if you are running street legal tires, you can register in the new experimental RCS class.

Orthonormal

I've been contemplating the comparative benefits of the different years and trim levels for the past few weeks as I try to choose a car for RTR competition. Here's a summary of my thoughts:

Series 1 base vs Series 2 Sport:

Equipment is comparable according to the brochure information.
A slight increase in stiffness was achieved by making more welds. Based on that, it doesn't seem like there should be much difference in weight unless the new bodywork (which is just the front and rear bumper covers, correct?), new wheels, or interior changes, add weight. Jason Isley reported that based on his weighings, there could be up to 50 pounds difference between minimally equipped examples of the two cars.

There was a change in suspension geometry, which may or may not be beneficial for autocross. On the track, it is supposed to reduce corner entry understeer and corner exit oversteer.

Series 2 is geared shorter, resulting in more wheel torque in each gear, but a lower top speed in each gear. Good if you don't have to shift, bad if you do. Benefit goes to the Series 2 if you run RTR (or local street tire stock), and to the Series 1 if you run CS on DOT-R tires. Generally.


R3 vs Series 2 Sport:

The R3 packs some added standard equipment (3 extra speakers, audio amplifier, foglights), which adds weight. It may be overall lighter in completely stock form because its stock wheels are forged and relatively lightweight for 19" wheels. The standard 18" wheels on the sport are pretty average in weight, and you can get much lighter wheels. You're unlikely to lose much weight from wheels on the R3.

The R3 also has traction control, which you'll have to remember to turn off before you run. You may get very good at remembering that after the first few times.

The R3 has Bilstein shocks with a fancy valving (not the same as the Bilsteins on the Shinka, I think). But since you can replace the shocks within the Stock rules, that's not an advantage.

Spring rates are the same.

The R3 has a slightly stiffer rear swaybar (perhaps 25% stiffer based on some dimensions that someone tossed out there on the Miata forum). Theoretically that would allow you to run the front swaybar stiffer than you could with a Sport, for a slight overall improvement in roll stiffness. But I don't think that 25% of the stiffness of a small rear swaybar is really a significant fraction of the total rear roll stiffness. On the down side, it could make inside wheel spin worse, which it does seem like folks are concerned about when they run on DOT-Rs.

The 19" wheels on the R3 probably remove some of the ability to adjust gearing and height by choosing tires with a smaller outer diameter.

TeamRX8

iTrader: (25)

the S1 is better if you can get the early stripped down base model

Orthonormal

Does it get any more stripped than a base 2006? I didn't find any difference in spec between the '06 base and the '09 Sport, aside from the trunk lip spoiler that comes standard on the '09 manual transmission cars.

I also didn't see any indication in the model 2006 year-to-year changes that anything had changed from 2005 in the base model equipment. So...2004?

TeamRX8

iTrader: (25)

the general Mazda specs don't always paint the whole picture

the 2004 & 2005 base models were the lightest, everything gained weight from there

the results success average favors the 2004 and 2005 models .... 2004 models had the most issues ...

JustinBeiber

what was added to the 2006/2007 base model comapared to 2004/2005?

6MTGirl

iTrader: (7)

2004s and early 2005s came with a smaller starter and battery. FWIW, my base '04 was 2830lbs in CS trim with the stock exhaust and updated starter and battery. Carter's old '04 was under 2800lbs with an Isley exhaust and original everything.

TeamRX8

iTrader: (25)

it had a TeamRX8 exhaust, not the Isley one

i didn't recall it being under 2800, but apparently it was indicated as such

https://www.rx8club.com/rx-8-racing-25/2007-scca-nationals-b-stock-weights-133564/

I would say that the drive-on scale at Topeka then was off, just above 2800 is about as good as you can get legally with accurate corner scales
.