Originally Posted by strat61caster (Post 3580536)

ProParts Megans, there’s also Shaftworks and Redshift for similar money, they all come with camber plates. Monotube, built by autoxers who understand the sport and the locations you run at, closing in on 40k miles on my Megan’s and they’re still great. You might run into Shenefield at an event where you’re at, ask how he would advise your setup. They’re all single adjustable rebound which is where the handling changes come from, while they’re 20-30 clicks you don’t really feel 1 click so put in 2-4 which effectively narrows you down to a ~10 adjustment damper. Once you get compression set right for the surface odds are you don’t change it.



I don’t like the KW stuff, twin tubes, useless support (KW NA that is, RCE is clearly better) but they can take you to the front. MCS cars ride great but a lot of people local to me are switching to shaftworks, their support is great and local to us. :iono:

Originally Posted by cmiovino (Post 3580589)

I was today years old when I realized SSC PAX is 0.807 and DS is 0.808. AKA, with Konis, Ebach springs, camber bolts up front, ~2.5 degrees up front, adjustable lower control arms AND 8" wide wheels, you need to go actually slower to get the same PAX score.

Again, all on a 225/45/17 RT660, but that's what I was on last year. Fucking christ the 1st gen is boned in DS.

Going to STX the PAX is only 0.817, meaning you need to go exactly 1.1% quicker to maintain the same PAX position. This equates to exactly 0.5 sec faster on a 45 second course or 0.33 seconds quicker on a 30 second course.

Given I'm on a 225 on stock wheels, moving to a 245 on a 9" wheel, plus coilovers offering ~4 degrees of camber up front and 2.5 in the rear with LCAs... I think ANYONE could go half a second quicker just from that. Let alone adding a header and tune to top it all off eventually.

(This is just me convincing myself to go to STX.)

Originally Posted by cmiovino (Post 3580503)

Do you know what coilovers those are for $2k?

I haven't made the jump to STX because I keep thinking I need at least ~$3k RCE Tarmac 2's with camber plates, if not something like MCS and up in the $4-5k range.

I've been thinking about it and something like $1800 RCE SS-1's or something similar with good valving, but less adjustable might be better. I don't want to get totally lost adjusting 2-way dampers, or having 30+ adjustment clicks to play with.

Originally Posted by otter (Post 3585548)

For shits 'n giggles I took a pic of mounted and unmounted 255s side by size to see just how much they get squeezed down on the class-legal wheels.

Originally Posted by dragoontwo (Post 3585549)

Did it change the wheel height also?

Originally Posted by otter (Post 3585551)

Wheels are 17". Did you mean tire diameter? If so, here's the diameters of common BRZ autox sizes on the Stones from TR:
OEM 215/45/17 - 24.7"
225/45/17 - 25"
235/45/17 - 25.4"
245/40/17 - 24.7"
255/40/17 - 25"

There's also a 245/45/17 tire that's 25.7" but I've not seen anybody on this tire.

Originally Posted by otter (Post 3585559)

I'm really confused about what you're asking, I didn't shrink anything, I'm running the OEM wheel size (17x7.5).

Originally Posted by dragoontwo (Post 3585605)

It's more of a curiosity since I don't even compete in SCCA.

Originally Posted by strat61caster (Post 3585567)

With the tires squeezed beyond an inch of their life do they still measure in spec for circumference/diameter or did they balloon out due to the pinch?

This could affect a small gearing change worth arguing about because you have too much free time in a weekend only getting 5 minutes of seat time.

Originally Posted by renfield90 (Post 3585729)

I might be dating myself here. Were you around back when Integra Type R owners in DS were mounting 275 Hoosiers onto 6" wheels? If it's compliant to the rules and it's faster, send it...

FWIW, back in my CS days I ran 245s, but it was definitely a compromised setup and I don't think it was any faster except for the first 60' of a ProSolo start. I've probably made this exact comment more than once, and probably in this specific thread, but it's worth repeating. With most modern 200tw tires I think you are just lighting money on fire. As always, please don't rely on vibes or theory, go test! The clock never lies.

Originally Posted by strat61caster (Post 3585751)

If stx isn’t disrupted next year the next tire I’m buying is a 225 re71rs, not a 265 even though we’re allowed it and that much tire has already been successful.