Scott;
The main track I run on has a very abrasive surface and my Hoosier Street TDs would last 3 race days......(30 minute practice,I usually run about 4 to 8 laps, qualifying, 4 laps and the race itself, 12 laps (1.8 mile course,14 turns)..... they still have "some' rubber left, but are too hard and have very little grip......some guys stretch them to 4 race days, but that is a stretch and they are not competitve on those tires.......I have found from new tires to 3 "race tires" I would lose about 2 seconds a lap!!!!!!!!!!!! right now the top 6 or so cars are all within 2.5 seconds on their lap times!!!!
The few laps I've run so far with the R6 tires feel good and the grip feels better, did not get to time those laps and was not running 100% anyway....... I did notice the air pressure stayed more consistant with the radial than the bais tire and others have confirmed that..........price wise they, the R6 tire is about 30 bucks per tire more, but should pay-off with quicker laps times and better tire wear........I do not race again till the first part of November, have 2 races in Nov. and one in Dec. and I'll know a lot more then..........
Also,going to change my front springs next week, going to a little stiffer spring to help with body roll......
All in all, with the tire and spring change I'm looking for about 2 seconds a lap and hope to get it, that should put me right up there with the top 3 cars..........also,going to have another guy drive my car a few laps for a second opinion.........could be the driver and not the car!!!!!!!!
, no one else has driven my car,yet, so I have no feed back as to what they think it's doing or what improvements I could make......
David