Correction: that might be 300' radius -- not diameter. I'm sure somebody out
there knows and will chime in.
> -----Original Message-----
> From: Michael R. Clements [mailto:mrclem@telocity.com]
> Sent: Thursday, March 07, 2002 11:59 AM
> To: james creasy; Darren Madams
> Cc: J C; ba-autox@autox.team.net
> Subject: RE: Geez! (was: Going Downhill)
>
>
> Skid pad is sustained Gs, not instantaneous peak. Usually
> measured on a 300' diameter curve. I read a study somewhere that
> measured Kumhos, R1s and Hoosiers with various sports cars and
> the highest sustained G they measured was around 1.25. This would
> lead me to suspect that Borden's 1.47 is probably a peak value --
> however if it's sustained then I want a ride!
>
> Also remember that since the G-Whiz is a two-axis accelerometer
> it cannot compensate for elevation changes. So if you measure Gs
> while going up an incline you will get higher readings. Based on
> experience with my own G-Tech pro I can tell you that these
> things are HIGHLY affected by even slight elevation changes (and bumps!).
>
> > -----Original Message-----
> > From: owner-ba-autox@autox.team.net
> > [mailto:owner-ba-autox@autox.team.net]On Behalf Of james creasy
> > Sent: Thursday, March 07, 2002 11:25 AM
> > To: Darren Madams
> > Cc: J C; ba-autox@autox.team.net
> > Subject: Re: Geez! (was: Going Downhill)
> >
> >
> > i think it also shows the max peak and sustained lateral, accel
> > and braking
> > G's. kinda cool as borden registered 1.47 lateral Gs (and 1 G
> braking and
> > acceleration), and i think vic said he was getting 1.4 lateral on
> > kumhos. i
> > wonder how it compares to a skid pad G test.
> >
> > -james c
> >
> >
> > ----- Original Message -----
> > From: "Darren Madams" <darren@madams.com>
> > Cc: "J C" <veloimpreza@yahoo.com>; <ba-autox@autox.team.net>
> > Sent: Thursday, March 07, 2002 2:13 PM
> > Subject: Re: Geez! (was: Going Downhill)
> >
> >
> > > I have one of the early serial number cubes back when it was
> a "Box" and
> > > way before it was "Extreme". I've found it pretty useful,
> but it's best
> > > use is comparing to other drivers in the same car.
> > >
> > > It does map the general shape of the course, but it can't be
> > used to tell
> > > how far off the apex you were. It does have numerous guages that show
> > > calculated speed in MPH which can be used to see when you
> were above or
> > > below other runs... or how fast you were when you broke. It
> takes some
> > > time to do the analysis the day after, but combined with the knowledge
> > > that Byron has collected over the years (which he's willing
> to share in
> > > person and in NAP), and the data I've collected, I feel like I better
> > > understand where REAL time is gained and lost. Of course, I
> still have
> > > problems executing that plan, but at least I know where I'm losing a
> > > chunk of time (high speed sweepers).
> > >
> > > Theoretically it can be used to judge performance improvements
> > of various
> > > car modifications as it tracks peak and sustained lateral g's
> as well as
> > > a calculated horsepower guage. If you have access to a 100ft
> skidpad it
> > > would definitely be good for alignment and tire testing, but all the
> > > variables on your typical autocross run generally prevent that (unless
> > > the change is major between runs of course).
> > >
> > > As Josh said, http://www.extremegeez.com/ and Byron Short is always
> > > willing to answer questions when he's not out on the road working or
> > > giving seminars.
> > >
> > > --Darren
> > >
> > > You wrote:
> > > > It's a device and software to help you analyze your
> performance during
> > > > performance driving. It has micro accelerometers such that
> > it can track
> > the
> > > > cars every motion during your run, and you can compare two
> > runs with it
> > (was
> > > > my co-driver faster in that corner? Why? Oh, I see, he
> broke earlier
> > than
> > > > I did and got on the gas sooner coming out).
> > > >
> > > > Developed and sold by longtime autocrosser Byron Short.
> > > >
> > > > http://www.extremegeez.com/
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "J C" <veloimpreza@yahoo.com>
> > > > To: <ba-autox@autox.team.net>
> > > > Sent: Thursday, March 07, 2002 10:07 AM
> > > > Subject: Re: Going Downhill
> > > >
> > > >
> > > > > --- Darren Madams <darren@madams.com> wrote:
> > > > > > More importanly, it's hiding in every braking zone
> > > > > > and every straight
> > > > > > too... Jesus is a pretty good guy to listen to!!!!!!
> > > > >
> > > > > > Oh, and get a Geez cube and a codriver. :)
> > > > >
> > > > > Why do I get the feeling like I'm opening up a can of
> > > > > worms here by asking... "What is a Geez Cube"? Are you
> > > > > talking about someone aged 30 or over ;-)? <hehe>
> > > > >
> > > > > > The biggest place to gain and lose time is the
> > > > > > slowest corner before the longest straight. At the
> > > > > > Atwater kart track that fact is painfully obvious
> > > > > > (and a delight for those of us that understand that
> > > > > > secret).
> > > > > >
> > > > > > Best book about this stuff is "Speed Secrets" by
> > > > > > Ross Bentley (it was recommended to me by Ben
> > > > > > Martinez who is quick enough already)
> > > > >
> > > > > Thanks, I'll check it out. I already have Henry Watts'
> > > > > "Secrets of Solo Racing" which has been quite helpful.
> > > > >
> > > > > Joe
> > > > > Try FREE Yahoo! Mail - the world's greatest free email!
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