Soloontario

I have a C5Z with 10.5" rims in a square set up and Michelin Pilot Sport Cup 2s 295/30-18s. Running neg 2.5 camber up front and neg 1.5 in back. (still on stock rubber bushings so have no idea of what the actual dynamic camber is). Only mod is a front Strano sway bar. I do not have a pyrometer but tire wear seems really even i.e I am very pleased with it.

Question is, what is the best hot pressure? I have heard from 32 to 36 PSI. ( I usually aim for a 6-7 PSI increase from cold and assume I lose at least 1 lb during a cool down lap). Would love to hear your experience.

ErnieN85

take a look at this

c5racr1

I found they worked great at 32-33 hot. C6 z with cup rims 19/20. -2.0front 1.5 rear tow out in front 0 tow in rear

Soloontario

Thanks, I had seen this and I suppose the Sport Cup 2 is likely pretty similar to the Sport Cup although I think the compounds and sidewalls are different.

At my last competition event, part way through I tried raising my pressures to what I think would be 36 PSI from 32-33 but I ended up going a bit slower.

Interesting that according to the article quoted, an increase of 100 degrees F should turn out to be about 7 PSI which seems about right.