Goodyear vs Hoosier Slicks, The testing continues.... Options

[nine14cats]

I tire tested this last Time Trial at Buttonwillow. I'm running 23x9x15 canti slicks in the following:

Goodyear = R430 Compound
Hoosier = R60 Compound

I scubbed both new sets of tires in 1 month ago at Laguna. I then ran the Goodyears in session 1 on Sat and Hoosiers in session 2. I reversed the order on Sunday in order to be fair about track temps. Both days were low 80's ambient.

Saturday I was 1.8 seconds a lap quicker with the Hoosiers and Sunday I was 2.2 seconds quicker. I guess all it means is that the Hoosier compound was working better for me that weekend.

Does anyone know if Hoosier and/or Goodyear changed their rubber formula significantly over the last year? Last season the tires performed nearly identical.

Anyone with similar experiences?

Bill P.

[ArtechnikA]

Do the slicks nowdays still leak air like seives?

the set i bought a couple of years ago are still holding pressure pretty well. (that'll change pretty soon, as i think they're going on the 911 for an event to try to use up the last of the rubber to try to recover a little of my investment...)

there's no reason for slicks to hold air for a long time.

in racing applications, they're on the track for somewhere between 30 minutes and 50 miles. on the AX course they're on-track a couple of minutes. in that application, rubber in the sidewalls just adds weight.

they're not designed for street use, and you expect to have to adjust the pressure before every track outing anyway...