I've never run them before and their website has no advice for the wets. Car is a widebody 911 and weighs 2750 with driver/fuel. I think the tires are 235/255-18.

What would you suggest for cold pressures? What is the target for hot?

 

Unless the track gets dry, in which case you are screwed, they never really get hot and will not build much pressure. My RSA weighed 2700 lbs and I started mine (235 & 275/18) at 32 & 33 cold which went to 34 & 35 warm. Ran a 1:48 at RA in the pouring rain, so I'd say that they worked pretty well.

 

Just as written above, go a bit higher with your cold PSI pressures for the wets. If the ambient temp is cold, you'll have to go even higher. You can shoot anywhere from 35psi to 38psi hot. A lot of guys like the higher PSI so that they get a slight crown on the face of the tire to aid in the displacement of standing water. Hoosier rain tires are downright awesome in the rain if it's raining. If the track is damp, be careful; if you see a dry line forming, stay off of it. You can destroy a brand new set of Hoosier rans if there's not enough water on the track. They're really best suited for downpour type stuff.

 

having just bought some wets, what do you guys use when it is damp (not pouring?) Doo you still use R6 of something like R888?

 

you can groove R6s with a soldering iron to use as inters. But the toyos are great in the rain (only).

 

Dan
R6 are fine in the damp

 

Thanks everyone

 

Yep, you want water on the track for wets. As for pressures, I run mine at 34 hot, 30+ cold. They really don't heat up a lot if it's wet, and if it isn't you will burn them up...

 

A Wet is basically an R6 with grooving so think of it that way. It's the same rubber.

Take your target R6 hot temp and work backwards assuming they will not heat up that much int he wet. So if you like 38 hot, try 35-36 cold and see what they go to. If it's likely to dry out, set them a bit lower as they will heat up more.

 

I always felt that it was the A6 autocross compound, because it felt softer than the R6. It would be interesting to know; I wonder if Hoosier would tell us.

 

At Road Atlanta the HOOSIER tech said 31 degrees cold for rains on the S2.

 

In Koni we only have two choices and those are the spec Hoosier dry tires and the Hoosier wet tires. I haven't raced yet on the R888s so I'm not the guy to ask but if I had to guess, I'd say they're probably very good in that situation. If it's like the RA1 and has a slightly softer sidewall than the R6, and i'm assuming it does, then it's going to be pretty good in that situation. I've raced on the RA1s in cold, wet conditions and they were great. The best thing to do is to buy someone's old old, hard as a rock, purple Fred Flinstoneesque Hoosier wets and reserve those for the situation. It will build heat and pressure better than a dry tire if it's cold, but significantly less heat since it won't have near the grip level. You don't have the grip, but they're not as soft so you won't mow them off as the track is drying. It's sort of a grassroots intermediate special! But works like a champ.

 

My understanding is that they are the A6 auto-x compound.

 

^^^ what he said ^^^






Professional Racing and Driving Coach

 

You ran a 1:48 at Atlanta in the rain?