G37 Track/Autocross/Daily Alignment

[Whittie]

Hi Folks,

I understand that there are G specific forums, however, the level of development is much higher here and a G is just a Z 2+2 with a different name. The average level of maturity is also higher than the G forums...

Anyways, back on track:
I have been doing Autocross events in my new Q60 (another name for G37 - Geez Nissan is confused about what they want to call this car!) and the lack of camber is causing a lot of understeer and destroying tyres. I'm signed up for a couple HPDE days in the next few months and before I go and buy a decent set of tyres (RE-11 or RE-71R, still deciding) I want to get an alignment done.

I have purchased a set of SPL front upper camber/caster arms and so now I'm looking for advice on what sort of alignment to get for this car (booked in for tomorrow), allowing that the additional wheel base may (or may not, not sure!) require a slight difference to a standard Z. So far I plan to get the shop to target:
- Front Camber: -1.7 degrees
- Front Caster: Max the arms will allow (6-7 degrees? Any issues foreseen here?)
- Front Toe: 0
- Rear camber: -1.7 degrees
- Rear Toe: toe in 0.08 inch total (0.04 inch each side, is this OK?)

The biggest uncertainties I have are in regards to the Rear Toe and Front Caster. I don't know what Caster these cars can deal with by just adjusting the top arms or what to tell the mechanic to target for rear toe.

The car is my daily (60 miles round trip commute) and I autocross 1-2 times per month and will track probably 2-3 times per year. Tire life on the street is not a goal of this setup, even tyre wear on the track is.

Thanks!
Tom.