09-07-2020, 03:59 PM | #221 |
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Just finished a track day with Toyo R888Rs - 265/30/19 up front and 295/30/19 in the back with all 4 corners on Titan7 staggered 19" wheels. Running M Performance suspension with the ride height left at stock. There wasn't any rubbing at all. This is with -3.4 camber up front and -2.4 in back.
Overall was very happy with the setup. Everything in the car felt more stable and manageable. |
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09-08-2020, 04:16 PM | #222 |
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Currently running 265/35/18 Yok A052's up front with R&T's. 18X10 +33 and a 15mm spacer. Had to increase preload nearly 10 mm beyond the suggested setting. Currently running 275/40/18 in the rear. It's a tall tire, no issues. 18X11 +44, no spacer.
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09-08-2020, 08:18 PM | #223 | |
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I知 running a 7.5mm spacer on the front with a 265/35r18 RS4 on an 18x9.5 et28 wheel. Spacer would be totally unnecessary with the spring/collar out of the way. Any adverse affects to ride or handling with the extra preload, assuming you had some time at the recommended preload with s different wheel/tire set? Has anyone looked into whether a shorter spring could be used to increase tire clearance without risk of coil bind at full compression, but also possible to preload the spring? While I知 very happy with the coilovers overall, this is the one shortcoming of the Ohlins R&T that I壇 really like to do something about. |
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09-09-2020, 09:12 AM | #224 |
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The extra preload is needed for the seat to clear the tire's shoulder. The springs are linear, so no handling issues. I'm planning on getting custom perches made that will allow the benefit of shorter springs - 8 to 10 mm of additional tire.
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09-09-2020, 09:48 AM | #225 |
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I値l be very interested to hear about these perches. Please share what you can when they池e complete.
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09-09-2020, 10:19 AM | #226 | |
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Have the car setup with TC Kline D/A Koni's. My 295's in the rear will make contact at full compression. I will be adding some shims to the rear to increase Neg Camber so they clear. other than that the setup is outstanding. I'll probably go to the 295/30's next time around.
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09-09-2020, 11:23 AM | #227 |
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It's crazy the stuff we have to go thru to get a good tire & suspension combo on this car!
There are no good rubber choices for the M2C to put the power down unless you change the brakes so you can put 18s on the car (R888Rs are slow, 71Rs grease out, R7s are expensive and don’t last, Trofeos are better suited for the street, no Pirelli or Michelin slicks), and finding a coilover setup with enough clearance to run wide wheels & tires is a +/- mm experiment each time. I haven't made the jump to coilovers yet since I daily my car and our roads here are horrible and the Dinan HAS is about the softest setup out there, but it's allowing me to run 265/275 18x10 ET25 in the front and 295/305 18x10.5 ET40 EC-7R's in the back, no spacers. At some point being able to get max rubber under the car in the best tires/compounds available def outweighs the extra power available from the M2C, or having to deal with the fuss of running crazy spacer & suspension settings to make certain coilovers work. SEAT TIME RULES is def on the right track, it's just cost an arm & a leg to get there bc of all the constraints with this car! Last edited by ZM2; 09-09-2020 at 11:42 AM.. |
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09-09-2020, 12:14 PM | #228 | |
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09-24-2020, 10:59 PM | #229 | |
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09-25-2020, 12:42 PM | #230 | |
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09-28-2020, 07:25 AM | #231 |
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I wanted to chime in on my setup. 2020 M2C
Ohlins R&T (running recommended preload), Front camber plates, -3 camber front, -2.1 camber rear, Brembo GTS 380mm brake kit. Yokohama A052 265/35/18 front, 295/35/18 rear. 18x9.5 ET22 fronts 18x10.5 ET40 rears Not running spacers at all, no rubbing. |
09-28-2020, 08:52 AM | #232 | |
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Anyone know the spring width difference between M Performance and Ohlins? |
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09-28-2020, 09:44 AM | #233 | |
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You need at least ET16 with the 18x10 and the 275 to keep the inner clearance the same. There inner clearance with the Ohlins R&T in the front is pretty much at the least you want it to be with these specs. |
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09-28-2020, 09:53 AM | #234 |
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Yeah, did that math in my head. Guess I should have been more specific with my question: how much clearance do you have right now?
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09-28-2020, 10:51 AM | #235 |
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I haven't measured it, since it is hard to measure, if I had to guess, I'd say maybe half an inch? I was concerned with sidewall flex and the tire rubbing if it flexed, but it looks like the sidewall mainly flexes at the contact patch.
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09-28-2020, 11:02 AM | #236 | |
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My rough math tells me ET20 would work for 18x10 & 275s with Ohlin or M Performance, but test fitting would be the only way to know for sure. |
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10-06-2020, 07:18 AM | #237 |
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Put on the shorter springs and added a lot of clearance....can run 275/35/18 on front with 5mm spacer....will track it in a few weeks to see how this changes the handling
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10-06-2020, 09:27 PM | #238 |
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I知 running a 7mm spacer and clear 265/35r18 RS4. I知 sure a 275 would clear with it as well. I壇 just prefer not to run spacers on track. Yes, I知 being paranoid.
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10-07-2020, 04:59 AM | #239 | |
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18 x 10 et 25 18 x 11 et 44 Last edited by M2C AW; 10-07-2020 at 08:58 AM.. |
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10-21-2020, 01:30 AM | #240 | |
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10-21-2020, 10:33 AM | #241 |
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Has anyone successfully fit a 305/35r18 NT01 on the rear, ideally on a 18x10.5 et40 wheel? I’m interested in trying them and 275/305 is the closest to ideal sizing for my 9.5/10.5 track wheels that they offer.
The Apex fitment guide makes 305 sound like a tight squeeze, but I see other 305’s being successfully fitted in this thread and elsewhere. FWIW, my M2 is lowered around 10mm in front and roughly 15mm (I’m guessing as it seems to have settled a bit in the rear since install- open to changing ride height) in the rear on Ohlins R&T. I’m also already running a fair bit of camber at 3.2f/2.4r. Backup would be to try 265/40f and 275/40 rear, which might not be horrible from a handling perspective as I’m torn on square vs staggered. Will probably just require some massaging of the front liners. |
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10-21-2020, 11:19 AM | #242 | |
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