Flyinglizard
New member
The grip stays the same after the first run.
The shaved tires wil always be a little faster due to weight and roll out.
The shaved tires wil always be a little faster due to weight and roll out.
Chip-
Buy a 2nd set and let me shave 'em. Test those too. Let's see how deep the "cost savings" actually are.
And before anyone says "no shaving"- send me a set of worn tires and a set of new ones. I'll send you back two sets that you won't be able to tell apart *visually*.
I'm pretty confident that you're going to be disappointed in the difference between shaved (or "worn") street tires and new ones, with the current crop of options. That's just one guy's pointing at the fence, tho.
K
i I do doubt that we can get enough people to willingly shed the purple crack to make the competition element worthwhile.
Nope, hard sell right now given the differences in lap times that the best data we've seen to date suggests.
What stinks is the damn tire sizes. In 15", the largest wheels allowed in IT other than ITR, most of these "street" tires max out at 205 or 225 sizes. That isn't a good fit for the heavier and typically higher horsepower cars one finds in ITS and to a much lesser degree ITA.
Nope, hard sell right now given the differences in lap times that the best data we've seen to date suggests.
What stinks is the damn tire sizes. In 15", the largest wheels allowed in IT other than ITR, most of these "street" tires max out at 205 or 225 sizes. That isn't a good fit for the heavier and typically higher horsepower cars one finds in ITS and to a much lesser degree ITA.
I was the only one on street tires this weekend. Ed was about 2 seconds slower per lap as was I. First 3-4 laps on the street tires will be your best, then they get loose and about .5 seconds slower on average. This was at NHMS, a slow corner track where you need rear grip to get you out of the corner (other than the oval).
Did you guys have a chance to play with setup at all for the street tires? I know that the setup I've run on race tires in the past is oversprung for street tires and I've seen big setup changes needed just moving from one street tire to another. Not faulting you guys in anyway for what you did, just wondering if there was any time left in the street tire setup maybe.
You are 100% correct that more time can be gained! We did not change set ups since we were running back to back with only a few sessions in between. I don't think it's worth seconds but certainly some...
Stephen
Stephen didn't mention but it I worth mentioning... The car set up worked great with either tire, no need for changes. Obviously huge dollar changes/testing with a lot more time between runs could allow for some fine timing of spring rates and shocks but to be honest that also goes for the race tire... My feeling is the same time gained for the street tire is equal to what could be gained with the race tire.
Another thing is the tires had a big spin in nascar turn 1/2 at ~95mph and did not flatspot... Just another reason it's a good tire for new drivers... Hoosiers would have been toast for sure!
Raymond "still feel the Dunlop is a great tire for newbies saving money to develop car and skill" Blethen