On Nov 17, 2008, at 6:58 PM, Doug Odom wrote:
Jon, Anytime you are thinking or talking about race tires first you
have to understand. It makes all the difference in the world if you
are talking about a radial tire or a bias belted tire. Having spent
many days in the shop with a car on four scales, changing tire
pressure and sizes and load and having been on many stock car tire
tests with Goodyear and a lot more with the old Firestone stock car
tire I can tell you most of the time what works with radial tires
makes bias worse handling. What you see and hear on the TV at the
nascar races in no way will work on LSR tires. They change air
pressure to change the spring rate of that corner of the car. Changing
2 lbs. of air in a radial will not change the foot print very much at
all but it will change the spring rate a bunch. You would not even
feel it in a straight line but in the corner you sure would. Just
my 2 cents Doug in big ditch
I'll grant you that handling and myriad other issues can and are
affected by changing tire pressure and construction and such -- but my
question is simply about the pressure of the air in the tire, the
weight on the tire, and the resulting amount of contact patch.
I realize one big caveat about patch applies when we're talking about
big-ass slicks on a dragster - slicks that run very low pressure and
are heated and treated with stickum -- so that the tire can deflect
under extreme acceleration and have more of the sticky tire sticking
to the race track. Go back to static loads -- tires not rotating,
vehicle not moving. That's where my question is meant to be.
Boyoboy, this is fun -- we haven't had this much discussion in a few
days (maybe longer). Thanks to one and all for giving me something to
think about while I was on the snowthrower today -- moving the FOOT of
snow we got since this time last night. And - for what it's worth --
I not only run low pressure in the tires on the tractor -- but tire
chains, too. Snow is NOT the ideal surface I'm mentioning in my
question.
Jon Wennerberg
Tall guy with moustache
and a pair of 2 Club hats
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