C7 Z06 VIR (Full Course) - Nankang AR1 & CRS V2's!!

[@xbwang87]

Nice video and nice driving! So the CRS V2 is faster than the AR1 for sure. Looking at your lap times. How many laps did you have to warm up the CRS V2s? I have been running AR-1s for The past 2 seasons and I switched to CRS V2. Not used to them yet. Lastly. Do you drive different with CRS V2 vs AR-1? What do you use for cold tire pressures? My C7 GS was very tail happy yesterday on a hot day.

[@Justa2L]

@@xbwang87 for warm up it depends on the track, something big like VIR or Sebring I can start pushing on lap 2 (out lap and send it the next lap). Drive the same on both, I mean, the line is the line, no? Pressures I find it hard to control on both, both tires I’ll go out with 26psi all around and 5-6 laps in both are in the mid 30’s, sometimes the fronts 2 psi higher. I’d say the sweet spot for both is around 32psi hot.

[@Justa2L]

@@xbwang87 for rear end stability, make sure your rear caster is set correctly. Most alignment shops don’t know and don’t have the equipment to set this as this is not a common thing on most cars.

[@xbwang87]

@@Justa2L yes. I have mine set for 0 last year. This year I am trying 0.08 positive for rear caster. It felt great until I put in Race Louvers vents for the front. I have a little more downforce on the front before and it is causing a little tail happy. Also the track was very hot. I am totally aware of the rear caster thing you mentioned.

[@xbwang87]

@@Justa2L I tried 27.5 front and 25.5 rear cold to reduce some of the oversteer issue

[@xbwang87]

@@Justa2L I have stage 2 rear spoilers from ACS composite. I will add the bridge center section or call it wicker bill to see what happens.