nolimits

Randy, final and current config:

Rennline mesh grille guards
OEM PCCB rotors with OEM GT3/RS pads
AWE mirror wind deflectors
OEM 991.1 TTS shock/spring/sways

Tarett sourced:
-Front monoball camber plates for stock style shocks
-Front cup series lower control arm (LCA) kit
-Front Litronic sensor support brackets, GT3 style
-Front tie rod bump steer toe links, motorsport/pinch bolt locking style, easy adjust, don’t come loose or contact other parts like some locknut type links do
-Front axel spacer kit 10mm
-GT3 LCA shims
-Front lower control arm spacers GT3
-Rear long upper control arms
-Rear medium upper control arms
-Boot ends (large)Ira at Tarett was great to work with for parts, check with him for your specific goals/situation or his PNs/quote.

Most bushings are monoball, ones left OEM (I think they were the front LCA's) will need replacing much sooner than mono’s because they are not designed for the loads from this config. I’ll do full mono probably at that time and soften the DSC street settings some to offset, leaving Sport + taught, and yes edgy/knifelike as is. Not full out race car config feel, but exceptional track/street hybrid dual use mode set-up.

-DSC V2 controller, much custom tuning myself
-Sharkworks catback exhaust, otherwise OEM powertrain
-All 20”: 2 sets OEM wheels for PZeros 245/305, and C2s 265/325, 1 set Forgeline for R7 265/335 or Trofeo R 265/315

Alignment in degrees, or close targets for me as able:
Front – 3.4 camber, 9.2 caster, 0 total toe
Rear – 2.9 camber, 0 thrust, total toe .26 (.13 per side)

I keep rear toe minimal because I feel rear steer works well as is, if car was RWD and FWS this would be much different. Car not lowered so I can use soft DSC street settings and have suspension travel. DSC sport + set-up is firm. Camber and caster config does lower car some as a byproduct.

Randyc151

Thanks - Exactly what I was looking for. I will be adopting a couple of your suggestions. (These settings pretty much mirror Mike Levitas at TPC Racing, but he's trying to make a buck, you are trying to go fast)

nolimits

Ya they've done some good things with Mikes car and expensive weight loss carbon as you know. I'm looking foward to adding power next. Gotta get my lift wired and set-up now.

pepinozaur

-All 20”: 2 sets OEM wheels for PZeros 245/305, and C2s 265/325, 1 set Forgeline for R7 265/335 or Trofeo R 265/315


How do you like 265/315 Trofeo R? Any times compared to Hoosiers or Cup2 265/325?

nolimits

Haven't driven them yet, will have to wait til temps warm up here in spring, curious also on times too, expect them to be right in between above C2 and R7s.

pepinozaur

What is the time and feeling difference between C2s and R7s for your car? I would be very interested as I have bought a set of R7s and waiting spring to put them on.

I am considering adding just front camber plates and DSC controller v3 (if it works already with FAL&GlassRoof for 991.2TTS) , besides that, suspension wise, my car has only Eibach springs and better allignemnt ( like -2 camber all over for now, etc), hope these 3 mods to be kind of enough to keep it simple, but squuze like 80-90% of Hoosiers potential

nolimits

C2/R7, one track diff is 1:28 vs 1:25, other track 1:46 vs 1:43. C2s talk/squeal at limits more, R7s at full pressure seem more nimble and brake better due to grip. Problem with R7s was they had to be run at lower pressures to get those times, below Hoosier recommendations, led to poor wear and some type of visible side/shoulder seam wear issue not related to alignment. Hopefully they will improve that. Note 335 you probably got is narrow like a 305 or 315 at best. Hoosier is supposed to be working on a wider true 335 for next year. Re camber you will definitely want more, but you can flip R7s on wheels at least to even out wear. Enjoy !

pepinozaur

Thanks, great info! Yes my 335s are the "normal version" not "wide version" and they are more like 318mm wide(contact patch is even narrower), I have somewhere pics showing they arent any wider than 305 TrofeoRs.

Randyc151

So what's everybody doing to their cars this Winter?

For me, nothing settled yet, but may be: Cobb ECU tune and cat delete/bypass or 200 cell cats, 12x21 rear HRE P101's to accept the Cup2 R GT2 RS tires (fronts 9x20 will still work fine), new windshield (this one is pitted pretty bad), touch up the Xpel wrap, and a nice long cleaning and buffing. I'd like to get more downforce, but not really ready to start butchering up GT3 RS or Cup car parts just yet. I still drive this car on the street on pretty evenings.

Let's hear your wish list.

pepinozaur

Rear gt2rs cup2r tires R21 are way bigger than TTS r20 even if you run taller tires like 325/30/20, as they are 325/30/21, and awd should throw error messages, brake bias, abs, pasm, etc, maybe you want to take that into consideration. I would be interested myself into such solution if anybody can find a way to make it work.

Using 325/25/21 tires might be a bad idea (even they dont exist yet as far as I know- speaking about Cup2r) as sidewall will be narrow and that might hurt traction and maybe also heat control will be more tricky.

Randyc151

Yeah, I said I was looking into it. Won't work with my lowering springs, for sure. It's 1" more diameter, 325/30R21 = 28.7" diameter, 325/30R20 = 27.7 diameter. And yes, Tirerack has Cup2 R in sizes for the GT3RS/GT2RS fitment only at the moment.

nolimits

265/335 20 R7 will likely be our best bet for all out, but need trailering or swap at track. They are smaller diameter. With stock springs I'm hoping to make the new wider 335 work when available. We'll see next spring. I had considered RS options also, looks like we've been down the same path.

Bruce H.

Do we know what amount of deviation from stock tire sizes the ESC and ABS will tolerate? 1" front to back, more, less? I have a set of new 20's from a sold XKR that I might be able to use for the street.

I'm at a point with my order where I need to finalize my GT silver build. I haven't chosen any body color or gloss black paint options (sills, front grill, ect) thinking the way it comes may be best as far as minimizing cleaning and damage from track rubber marks. Any suggestions on paint options?

Bruce

WheelsB

Karl911