both track days for me i kept it at 28.
i am staggered fit 17x 7.5 in front and 17 x9 in back

 

30-32 cold all around

 

i ran them about 32 hot.

if you do 34 i think you will be losing a slight amount of grip. give it a try.

i dunno if i do it right but i usually mark my tires with white paint. i can then see how much rolling over i do and adjust pressure accordingly.

 

as for the white paint trick...i would do that to adjust camber more so than tire pressure...

 

i think i ran 38 hot all around once and was sliding all over the place.

 

about 35 hot seems to be quite good for 050's. 37-38 got a bit slippery

 

i have a slightly modded ap1, so it's even trickier than an ap2...thus what i do below should 'feel' even better on an ap2 doing lapping...

using staggered setip 17x7.5fr and 17x8.5rr, bridgestone RE01R tires (615 somewhat similar tire in the dry):

-show up with stock pressure 32psi (cold) all around, do 4 laps warm things up
-pressures get up to about 41psi (depending on weather), car very squirrly (now hot)
-pit in, check pressures (u should really check pressures all around first, THEN start dropping air per tire)
-drop pressures to 32 (hot) and get back out there to see how it feels
-now comes in personal feel for driving style/car setup, etc., so you can adj as how u feel fit for your driving that day. i usually go down to about 29-30psi (hot) in the rear, leave 32 up front. if u want to be 'safe' then do up to maybe 38-40psi in front while hot so you know you're not going over to much on the tire.

our cars are light, doesnt pay off much to have high pressures.