[mrj355]

Thanks Paul for the compliment on the "KA Record" time. I honestly don't know what the best KA time at Streets is. I'll have an SR for next year so we'll see what I can do then.

I wanted to also thank Naoki and Grip/Drift Day ppl for putting on the event and everybody who came out. It was good to meet some of you and perhaps I'll check in to Zilvia a little more than my normal once/yr.

I was using ADVAN Neovas (AD07).

Racepar1 ================
Really??? From my experience you want to run more cold pressure on cold days to bring the tires up faster. I've never heard of anyone dropping pressure in order to help the tires come in sooner. Are you sure that you just weren't running higher pressure then the tires were designed to run??? I mean on our hoosier race slicks we ran 13psi/16psi cold almost all the time. I run in the high 20's/low 30's with my "street" tires. I would talk to the hankook boys if I was you because that is exactly opposite of everything that I know about tire pressures.
========================
This is correct for slicks, my street tire logic below is incorrect for the tires Paul had. My error. To get the most out of those tires, aero and possibly more suspension tuning is necessary to get the right amount of heat in them for use in such short sessions. Also, a softer compound would have been ideal for colder outside temps given the short run times.


Regarding tire pressures (there are a number of variables to consider but here is a simple version).... The sessions weren't very long (20 min at most) and with the race tires Paul was using, it isn't as much about pressure as it is about getting them hot so he was correct in bringing pressures down because that increases contact patch and even (if low enough) sidewall roll over but the benefit is that working the tire harder generates more heat (=grip). Without tire warmers, it is almost beneficial to have gone out with low pressure (not underinflated) to work the tires, come into hot pit, air the tire to your ideal cold pressure +1-2psi and go back out to set times. Higher cold pressure wouldn't have helped the tire generate more heat.

But this is difficult in such short sessions and potential traffic. Regardless, Paul was quick and I think he was able to get some clean laps in because you can't do a 1:22.xx with traffic. More time probably could have been had by finding the happy zone for the tires.