I ran my BoxStock tonight with a NSX Body and tested PN KS-M Medium Low Height on PN +1mm 20mm Yellow BBS fronts and Marka V1R10 slicks on Kyo +1.5mm 20mm White Camaro wheels against Kyo 30* LH fronts and Kyo 20* Radials on the factory NSX wheels. All tries were taped with PN tire tape, and while I did super glue the side walls on the PN tires a long time ago the Kyo tires were left alone. No other changes were made to the chassis or radio between the tire change. I was used to the PN tires, so handling was pretty good. The Kyo tires took a bit to get used to, as my breaking and turning points were different, but it was ok on them. Better than I remembered from a few years ago. The fast lap times weren't that far off, but that's deceiving, as I wasn't pushing very hard on the PN/Marka tires, but it was all I could do to squeeze out that lap time on the Kyo times. Really a perfect lap, for me anyway, with me hitting the brakes just right into the fast 180*s and rolling through the others. On the PN/Marka tires ya still had to be mindful of TR, on the Kyo tires the car wouldn't TR all the way, but would want to veer into the wall instead of flipping over.
Anyway here's the times




The TR probably wouldn't be as bad if I would have mounted the body 1mm lower. The humidity is bad here at 71% at 71*, so traction would usually be different at the normal mid 50% range it usually is this time of year too. Anyway here's a side by side comparison of the tires. Next test will be with the McLaren F1LM.