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.

[john rogers]

Goodyear did change their rubber compund on many of their tires this winter, including the 9x23x15 slicks. It caused a delay in shipping from south america or where they are made. I got a set at the HSR race in Phoenix and they were the old compound so I have not had a chance to see the difference is. I can't remember which compound number is which, is the R430 the soft or medium? I use the soft compound and it does take a lap or two for them to get full grip as opposed to some tire such as Victoracers which a good on the first lap.