Actually, the Insane One, while true was on 33s, were all VERY thin and flat cut.
Some had cords BEFORE the feature, most had cords showing afterwards.
Fuel stop is the big difference in my book.
Once you throw that fuel stop in, you're looking at 2 races -- One to the stop, the other to the checkered.
The first half you're on whatever fresh tire you prepared.
The second half, you're on a heat cycled, sealed over tire with no prep (assuming no working of tires on the mandatory red.)
If you're not allowed to work the tires under the mandatory fuel stop, then when you go back to green, those tires will be cold and take a few laps to get rolling again.
That's really ok though, since everyone will be fighting the same issues.
Now, how to circumvent those issues becomes the advantage on the restart.
Internal (yes, in 33s), and keeping the tires warm during the stop - tire warmers, blankets, etc.
Then you throw in all the track variables, car count, etc. Like Ken said, a set of 11s can go the distance if they're right for the conditions. I've also seen tires (33s included) go away much quicker if they were not worked correctly for the conditions.
-----
Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cut
z
www.CarlsonMotorsports.com
Carlson Motorsports on
Facebook
30 years of service to the karting industry
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com