VetteDrmr

Now that I've got my first weekend on Hoosiers (S04/5s), I can see that the shoulders are going to cord way before the center of the tread is used.

So, for autocross, is it OK to run the tires until the outer edges just start to cord, then flip them?

TIA, and have a good one,
Mike

waktasz

I wouldn't wait until they start cording to flip them, but yes, you can do that.

John Shiels

what camber were you running?

TeamZ06

no, they need to be flipped well before cording

even if you flip them at the initial cording point you won't get nearly as long overall effective grip life as doing it earlier

there is a distinct air pressure vs camber relationship; the less camber you have then typically the more pressure your tires need. Most people cord Hoosiers from using too little air pressure, with the front tires being the most critical. Corner edge rollover is the key to determining proper auox pressure for the front, not a tire pyrometer. Overdriving the front tires greatly exacerbates the problem.

John Shiels

I really never had cording problems with them but I have 2.9 camber up front and start 33 cold and end 41-42 hot.

VetteDrmr

Thanks for the replies.

My Vette is the fun car for my wife and I, so I'm only running about -1.0 up front, -0.6 in back for street tires sake.

I'm also running 37 psi front, 33 psi rear. Based on what I'm seeing and hearing, I need to bump that up to 40, 36? These tires are scrubs that were essentially thrown away, so I don't know their history. But that's why I went with throwaways, so I can learn how to care and feed for these tires before getting the good scrubs.

Thanks again, and have a good one,
Mike

Barbara_S

Since I had the slightest cording on the outside edge of a front Hoosier on the 40th run, I thought about flipping all of them on the rims to go another couple of events. I threw out the tire because I don't want to get to an event with a tire that can fail tech inspection.
That's my reason to flip them before you show cord.

-barbara

John Shiels

not enough camber in front

VetteDrmr

So, should I run the pressures high enough that there's zero rollover, or if some rollover, then how much?

Thanks again, and have a good one,
Mike

95jersey

If your not going to run at least -2.0 of camber, the Hoosier is the wrong tire for you. Try the Kuhmo 710, they are much better for camber challenged cars.

VetteDrmr

I plan to, once I get through this set of old, used (cheap!) Hoosiers. BUT, while I'm working through these....

Have a good one,
Mike