Fool's Day was late this year. It arrive April 17th at the Homestead
Autocross track. At least for me...
thought we were going to have an easy race. The last run we finished
a good 2.488 seconds faster than our nearest competitor. This
time we would have new tires designed for autocross. And maybe
I would get a full four runs to set my fast time.
drive the Imp to the track and the crew bolts on the race wheels
with our brand new Hoosier 205/55Z14 A3S04 compound tires. As
the car comes off the jack someone asks, "What is that hissing?"
As the rear of the car sinks lower, the answer is obvious.
"Heh, I just filled those!"
two rear tires were leaking so badly that air is leaking out faster
than we could put it in.
have ten minutes before our first run. The crew flies into action.
car goes back up on the jack. The rear wheels come off and are
driven to the nearest gas station. It is just a convenience store
and even it's air machine is broken.
At the next service station the air compressor is working. The
tires are over pressured and then bounced like basketballs to
try and force the bead to seal to the rim.
to the crew, some rubber scraps left from the tire mold, have
folded between the rim and the tire bead. This prevents a seal.
It will require the tires to be dismounted and the scraps removed
before the tire could ever seal. After much valiant effort, the
crew returns with the tires still leaking.
have missed our first two runs and it is almost time for our last
two runs. We decide to run our street tires and do the best that
The street tires have a couple of big disadvantages. They use
a very hard compound. This is great for going 30,000 miles but
not too handy for turning a fast time on the track. They are also
This raises the car up higher hurting handling and the tires barely
fits in the wheel wells. This turns out to be the biggest problem.