No my 285s will be going on a 10" rim.

Actually I would really want a 11.5" but that's not an option. Yes the stagger is a concern, I want to keep the stagger to less than 40mm (30mm would be better). The initial plan is for a 275 front and a 315 rear, but I can get good deals on Hoosier scrubs that might be one size wider.

I think even 30mm is too much. To dial out some of the factory understeer I would do 10mm-20mm stagger.

Hmmm... yeah the understeer does suck a little I've noticed, and I guess I'd be making that worse with the fat-*** rears I'm looking at. Do you think running aftermarket sways with the rear at the hardest setting would alleviate it enough?

Official update:

I picked the car up from Berk Technology on Sunday with the stock exhaust back on it. The prototype exhaust system looks awesome in person and I cant wait to get a production version on the car for testing. The production version should be on its way to me at the end of this week or early next week with an X or H pipe. Plans are to get another baseline dyno before the Berk exhaust goes on then dyno again after the exhaust.

Yesterday before coming back up to Las Vegas, I stopped by BRIDE seats to test fit new 370Z seat rails. Good news is they fit! Bad news is that they wont get any more in until mid July.

After BRIDE seats, I went to Forgestar Wheels and we measured to see if an 18x10" rim would fit up front and also make sure that the 18" rims will clear the sport package brakes. Forgestar is confident that everything will be just fine!

Great update.

I will be looking for coilovers than have a stiffer rear spring, maybe as much as 14kg/mm vs a 12kg/mm front. I also will be looking for the stiffest rear sway bar I can find.

I'm still digging on tires sizes too. One way or another I'll make 18x10 and 18x11 work for me though. I really wish the PS2 came in some 305 sizes, it would make fitting this together easier. Another good rev-matched setup I found for the PS2 though would be to go 285/30R18 + 295/30R18. They're a little shorter than the 275/35 + 315/30 setup I was looking at earlier (which is a good thing, imho), but well-matched to each other (840 and 832 revs per mile, with the rear being the slightly taller one). The 285's are rated for 9.5-10.5 rims and the 295 for 10-11 rims, so that would fit on the 10/11 staggered rims and get the tire stagger down to 10mm.

I'll probably keep contemplating this and the rest of the suspension setup while waiting on the forgestars to be made anyways, and change my mind like 5 more times on tires :)

Carbonetic 1.5 way LSD just showed up! It will get installed on Thursday morning.

Excellent, I'm waiting to hear how you like this on the track, and how it holds up under longer/hotter sessions vs the stock VSLD.

Unfortunately Big Willow wont be too hard on the LSD compared to a track like Buttonwillow. Big Willow is big and fast, not many tight corners to power out of. What Big Willow will do though is put the Mishimoto Oil Cooler through the ultimate test since there will be A LOT of full throttle, sustained high RPMs and air temps close to or over 100 degrees.

Hmm Brides....

Exciting stuff going on with your car Mike, Im staying tuned to your results!

I'm loving this car too. Really excited for the Berk parts, and I'm really thinking about getting a pair of BRIDE seats...

Then again, $ comes from WHERE?! :(

Thanks guys. :)

Sweeeet! Helpful update Mike!... and great news on the rails. I should have mine back this weekend too, with same diff and some other bits... going to update journal now