race rubber for high HP, FWD cars

[Khiem Dinh]

What alignment specs are you allowed to use?  How much negative camber can
you crank in?  That should help alleviate the destroyed outside edges.

Um, less entry speed for less understeer? :P

On Thu, Aug 20, 2009 at 11:22 AM, John A. Heer <johnheer at gmail.com> wrote:

> Hi everybody:
>
> I am in dire straights here. I have run my Mazdaspeed3 for three
> autocross seasons, participating in maybe 6-8 events each season.
> Courses are between 35-50 seconds usually. Each season, I have
> shredded my race tires before the end of the season. Three seasons -
> three new sets of expensive race tires. And I have only competed in
> half to two-thirds of the events each season, not all of them.
>
> My first and second sets were Hoosier A3S05. I did not expect them to
> last too long, and I was right. But I got them at a huge discount
> because they were discontinued models. So this year, I went with
> Hankook z214 C70 based on recommendations from local autocrossers who
> said they should last me through at least one season. Well, no dice.
>
> On the Hankooks, I ran about 15-20 runs at three events. Cool
> temperatures for most - no 90 degree days or anything; one event was
> in the wet after a cool rain. I sprayed them down in between runs with
> water. I had pressures between 45-50 in front and between 33-37 in
> rear. No rollover that I could see. I switched fronts to rears and
> vice-versa between events (and between morning and afternoon at one
> event). Yet, one of the fronts chunked on the outside edge at the last
> event. There is a strip of about one inch of tread at the outside edge
> which is just GONE.
>
> The car is aligned to stock specs. No mods at all. Completely stock.
>
> I have come to the conclusion that the high HP, front wheel drive,
> nose-heavy dynamics wreak havoc on tires (no sh*t, Sherlock). So --
> anyone have suggestions on tires or techniques that will allow me to
> race a full season without cording the tires?
>
> John Heer
> 07 Mazdaspeed3
> 98 SE (R.I.P)
> 93 SE-R (sold)
> 91 SE-R (R.I.P.)
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