Update?

 

I've seen too many cars lose it in the wet with MPSCs there is just no predictable "margin" at which you know they are safe or not ...

A "damp" track perhaps, but going out on a wet track while it is raining where there is the chance that there is standing water perhaps combined with fluids etc ...

I would go PS2s or Pirelli Corsas ... and would go home if I had MPSCs on ...

 

I hate MPSC's..... Use the PS2's, then get a set of Nitto NT01's or R888's and call it a day! I'm loving my Nitto's coming from several sets of R888's.. 888's were a little better in the wet, I got caught in a thunderstorm with the Nitto's and it was a tad squirmy, but not uneasy feeling at all.. They were also grippier/quicker for me on the track as well!

 

Micheline suggests to go to a higher pressure. The tire design will put more tread away from the edge on the road. I will look for the reference. Over inflate.

 

From Micheline PowerPoint----

Care and Feeding
! PRESSURES
! General Guidelines: ! Road Racing :
! 25-28 psi cold (front/rear)
! 32-36 psi hot (front/rear) is your typical target
! Autocross (slalom): Looking for same range (of hot pressures-- may need to start at higher cold inflation pressures because of the decreased pressure gain in autocrossing).
! Road: OE pressures
! Rain: For both autocross and road racing, you may have to increase tire pressure 6-10 psi from what you would normally run in dry conditions. Your car and driving style in the wet is important here, so some experimentation may be in order.

 

 

Roberga so if wet and cold same time u still increase pressures? On cold days I always lower my pressures for more contact patch area. Mike

 

Not sure but think so. They are saying that the wet is the issue. My tires usually gain 7-8 pounds in a session. So if I read the slide right I would want my hot pressure to be 6-10 pounds higher hot. so with that I guess I would start with my normal hot target.
I am guess because I never run cups in the wet. My preference is PS2 or Hoosier wets.