Using R888 I have experienced unstability at hidh speed under braking which I never felt with MPSC or Hoosiers. I was wondering if you all feel this and how is your car aligned?

Stephan

 

I experianced a lot of movement under hard braking with my 18" Toyo RA1's compared to my worn down stiffer side wall 19" PS2's. I found out that since my RA1's were at full tread this was normal and they are now getting better with each session.

Toyo recomends -2 or more camber which I can not get in my 997S. I did have my shop do the best track alignment they could with my cars stock suspension and they changed the toe settings and my tire wear is a bit better and turn in and braking seemed a little better too but straight line high speed stability is not as good but I can deal with that.

R888 will most likely be my next tire.

 

i only get instability under very hard straightline braking when RA1 or R888 is brand new (full tread). after 150 track miles, they become as stable as any tires i have used, and that now inc. hoosiers.

alignment (depending on when ) but i have had from 2.0 to 3.0 front camber and 2.5 to 3.0 rear.
sway is full stiff rear and 1 from full soft front (i think this is factory setting)
1/32 toe out front
cant remember what rear toe was, but it less than most ppl.

 

Mooty you always have such valuable info! I noticed this under braking as well but during my last session on the 3rd day at VIR, was weird, but I think my tires rotated on my rims and many other factors that are since then getting reworked!

Question though, where can I find a sick spec sheet for my GT2? No matter what shop I talk to who has done GT2's, even my shop which does cup car's, works with TRG and Flying Lizard, it's just not coming out to where it could be !

 

i have now marked my tires relative to rim. i can confirm that it rotates over 270 deg over 2-3 days. however, i do not feel any inbalance on and off track at any speed.

those are on CCW wheels, with RA1, R6, PS2, cups and R888

i think i am just dense and dont feel anything.