Doug,
Feeling old don't count
ACTING YOUNG DOES!!!! wmts
Quoting DOUG ODOM <popms@thegrid.net>:
> Ken, I use the new Hunter GSP9700 down at the
Chevy dealership I work
> for. The reason for the road force info is the new
trucks with rack and
> pinion steering have a lot of feedback to the driver.
The oversized
> tires that guys run make the problem worse. Just like
you hear the
> NASCAR racers talk about changing the air pressure
one pound to change
> the handling. The soft sidewalls of radial tires work
like a spring.
> I have balanced my own tires for years on a
bubble balancer. This year
> I took them down and checked them on the Hunter. They
were spot on with
> only 6 and 8 pounds of load variation. Anything under
25# is good.
> Goodyear and Firestone used bubble balancers
for years at Daytona and
> never had problems. It was SOP not to use more than 1
1/2 ounces of
> weight on a wheel. If the weight came off, it would
not be undrivable
> with that small of a off balance. I remember the tire
guys cussing a
> bunch of times when they had to keep dismounting a
tire to move the
> inner liner to get the balance close enough to use
only a small weight.
> You have remember I started racing on Goodyear Blue
Streak Stock Car
> Special treaded tires, like 1964.
> Doug Odom in big ditch feeling
old
>
> Ken Bond wrote:
> >
> > Folks,
> >
> > I recently got an e-mail from a friend that
discussed a new tire
> balancing
> > machine from Hunter. I DON'T KNOW THE INDIVIDUAL
who sent the message to
> > my friend and have NO DIRECT information about the
product so please read
> > with a bit of caution. IF legit, it might be worth
trying to find
> > one of these units in your area of the country
> >
> > KEN
> >
> > ******************
> >
> > Topic: Hunter GSP9700 Tire Balancer
> > AutocroSSer
> > Senior Member
> > Member # 13
> > posted 13 May 2001 01:48 PM
> >
> > When I went to the Hunter Engineering Seminar last
month in SoCal, one of
> > the machines that Dave Scribner showed to us was
the Hunter GSP9700 Tire
> > Balancing machine.
> >
> > www.gsp9700.com
> >
> > This is the "Big Kahuna" of tire balancing
machines. Not only does it do
> > static and dynamic balancing, but it ALSO does
something they call
> "force"
> > balancing. Basically, it takes a weighted roller
and pushes against the
> > tire while it is spinning on the tire balancing
machine. Doing this, it
> can
> > detect variations in sidewall stiffness
(i.e. "spring force" of the tire
> > sidewall) and compensate for them with the tire
balance job.
> >
> > It is ALSO capable on nice spoked rims (i.e. my ROH
ZR6s or stock SS
> rims,
> > for example) of knowing WHERE the spokes are and
hides the weights (stick
> > on) that go on the "outer" part of the rim BEHIND
the spokes. The "inner"
> > weights are hidden back where you can't see then,
in the conventional
> spots
> > (lip of rim).
> >
> > Net result : NONE of the weights show AT ALL! I
mean AT ALL.....can't
> even
> > see them looking straight-on at the wheel, not even
on the rim that is
> > inside near the rotor! For you car show freaks who
want the PERFECT
> looking
> > wheel with NO weights visible on the inner rims,
this is the trick for
> you!
> >
> > So, my street tires had developed a vibration
starting about 70-75 MPH or
> > so. I found a nearby shop that had a GSP9700
(Custom Alignment in
> Mountain
> > View CA) and decided I'd give it a shot. Cost for
4 wheels was $57 out
> the
> > door, with me dropping off the tires/wheels and
picking them up
> > the next day.
> >
> > On the force variation, my tires varied from 4 lbs
to 28 lbs (4, 17, 21,
> > and 28 lbs on the 4 tires). This means that
(uncompensated) the worst
> tire
> > was essentially pushing back with 28 lbs MORE force
at one spot on the
> > wheel rotation. While that sounds like a lot, most
tires are within that
> > range.
> >
> > After AutoX yesterday, I bolted the rebalanced
tires back up (had been on
> > my AutoX rubber for the last week or two). Took it
for a test drive......
> >
> > This is, BY FAR, the BEST balance job I've EVER had
on a set of tires.
> The
> > car is SMOOTH AS GLASS at 90-100 MPH. So smooth
it's almost eerie . You
> > can release the steering wheel (quickly) at 90 MPH
and it doesn't shimmy
> > whatsoever! (not even a mm!)
> >
> > Needless to say, I'm VERY impressed! I was a bit
skeptical about spending
> > $60 on a balance job, but sure am not skeptical
anymore!
>
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