[C. J.]

Originally Posted by Ginola

I start with 25 in the bug but that's with 888's after a couple of laps on track they are at 32psi.. bang on where you want them, it depends how hard you drive/what tyres you use.. and how "slippy" you want the tyres to feel, but the only real way to tell is by trial and error..

So best bet is to do a couple of laps then come in and measure as quickly as you can.. after a few moments the measurements will be off as your front brakes will radiate large amounts of heat into the front wheels (presuming you drive it reasonably fast) possibly inflating them a couple of PSI further than the pressure they reach while driving.. (no air to cool it all down!)

It's all about trial and error really.

If we are talking about your Civic, I'm not that familiar with what the pressures should be on that beasty, but basically aim for road pressure when fully hot. as others have said.
I would even try 24/25 in the fronts at Brands and maybe 26 in the rears.. Ask some of the guys on the TypeR forum?

Spot on for road tyres
I normally start at 22 with rally Tarmac tyres