PedroNole

I saw the thread below, there must be more out there that have tried it... Is the set up for the car different (camber, toe, etc) than the Michelin? I've seen test results on the tire from different tracks in a direct side by side with the Michelin and in some cases, the Hoosier was a bit faster...

Geoffrey

Where did you find the side-by-side testing results on the Hoosier? How comprehensive was the chassis setup information accompanying the results and were they changed to optimize the different tires for the test?

PedroNole

Supposedly....the chassis setup is the same for the Hoosier Cup as the Michelin. Camber less than 4 degrees, toe is the same, ride height is the same.

The test results I saw were provided to me by a Hoosier engineer. Same car, same temps, etc. Road Atlanta, Road America, Mid-Ohio and Watkins Glen.

Geoffrey

Interesting because I did some testing of these tires for Hooiser and that data wasn't available to me at that time. I can confirm that the front tire is slightly wider than the Michelin, the rear tire is exactly the same. The rolling diameters are the same as the Michelin. I found the rear tires have a siffer sidewall than the Michelin which is in effect a higher spring rate and I had to make suspension adjustments accordingly. However, my car is significantly lighter than a GT3 Cup they were designed for. If you let the temps get 2-3 degrees above the optimum, they are very, very greasy. They are good cold. I ran the same alignment settings for both the Michelin Blues and Hoosiers.

Apex996

>>2-3 degrees above the optimum

Do you have on board IR tire temps?

Geoffrey

You mean like this?

Apex996

Yes. Very nice. What sensors did you go with? So you are saying that the Hoosiers didnt like anything over what? ~260? I was thinking of going with R6s on my 996 this year.

BTW, I sat 'next' to you at a Rouelle seminar at PRI a few years back. We have numerous mutal friends but I have never met you.

Geoffrey

The sensors are the MoTeC plastic sensors and they don't last long in the wheelwells when they are exposed to tire snot. The good sensors last longer because of the metal body, but they are cost prohibitive for our level. The Hoosier tires I tested were the Cup specific slick, not the DOT R6 compound. The tires would feel slick at above about 230F

That was a good seminar, I just wish the book was more useful.

Apex996

Are the Hoosier Spec Cup tires anything like the Koni Cup 'rocks'? I may have missed the Hoosier announcement.. where are these Spec Tires beign used?

Geoffrey

These are not spec tires, are not the Grand Am Hoosier tires, are not the DOT-R6 tires. These tires are a new product line from Hoosier built to compete with Michelin Cup slicks. You can order a set today from Bob Woodman Tire.

PedroNole

I tried the Michellin's (blues) and the Hoosier Cups back to back at Sebring during the 48 Hours. The Hoosier guys claim that they run the same pressures and the car setup is the same for the Michellins. First of all, it was my first weekend in the car so my feeling for tire responsiveness was somewhat handicapped by my getting to know the car. Second, I really liked the Hoosiers. I didn't notice any appreciable grip difference through the seat of my pants or my lap times. I even had the Hoosier guys go over the wall with me on one of my practice sessions to take readings.

They CLAIM you can get up to 8 heat cycles out of a set of their tires. Well, I didn't get there but did get to 6. At $600/set cheaper than the Michellins, I will be buying more.

wrloomis

Peter, how much is a set of the Hoosier cups?

PedroNole

About $1,600