Ferrari Mailing List: Re: ORR Video

[robert_h_bowser [at] juno.com (robert_h_bowser]

Hans -

That is a problem.  Running a car around a corner at high speed is just a whole 
lot different than running it at highway speeds.  Aerodynamics has a huge 
effect.  The first time I ran Big Bend in 2005, it scared me to death.  Even 
though I had run 15 or so races at 140+mph, and pre-ran the course several 
times on cruise control at 75mph, trying to run that course at 140 was scary.  
All I could say at the end was 'HOLY SHIT!'.

Luckily, the Corvette gets more stable as the speeds increase.  Opposite of the 
308.

Best thing to do is start at a low speed class (say the 110 class) and move up 
as you get comfortable with the course.

Bob

-- "Hans E. Hansen" <FList [at] hanshansen.org> wrote:
How do you obtain "track knowledge"?  I mean, w/o a high speed pre-run,
it would seem awful easy to mess up on a corner that was a tad sharper
than you thought.

On a related note, how fast (slow) are the slowest corners?  How fast
do you have to go to make up for the slower sections?

100K - that's pretty good.  If you have not already, give the wheel
bearings a good look - especially the rears.  A friend used to rent track
time for his C5 on the higher speed tracks like Daytona.  After only
5k miles, the rears were dangerously shot.  Like 2" - 3" freeplay at
the rims.

Hans.

On 4/30/08, robert_h_bowser [at] juno.com <robert_h_bowser [at] juno.com> wrote:
> No, I just look around for anything that doesn't look right.  I drive it 1000 
> miles just to get to the race, so I figure that if anything is amiss, the car 
> will let me know before I get there.  I've driven it over 100K miles, so I 
> know pretty well how it is supposed to feel.
>
> Bob
>
> -- LS <lashdeep [at] yahoo.com> wrote:
> Indeed, just being facetious about the belts and coil springs Hans...
> Bob, do you check torque on all chassis bolts or just for tightness?
> Also, how do you assess any stress fractures or fatigue in metal?
> I remember that the Porsche 917-30 had a gas charged frame...a simple check 
> valve and gauge rendered the frame usable or not.
> LS
>
>
> ----- Original Message ----
> From: Hans E. Hansen <FList [at] hanshansen.org>
> To: LS <lashdeep [at] yahoo.com>
> Cc: The FerrariList <ferrari [at] ferrarilist.com>
> Sent: Wednesday, April 30, 2008 12:00:15 PM
> Subject: Re: [Ferrari] ORR Video
>
> Timing belts?  This is a pushrod engine.  Short little chain driving
> the one and only cam.
>
> Hans.
>
> On 4/30/08, LS <lashdeep [at] yahoo.com> wrote:
> > Bob, this is awesome!
> >
> > Please tell me what your pre-race prep involves. What do you check? Timing
> > belts? Coil springs? :)
> >
> > LS
> > --- "robert_h_bowser [at] juno.com" <robert_h_bowser [at] juno.com> wrote:
> >
> > > Paul -
> > >
> > > Actually, it is pretty noisy at speed, but mainly road noise.  I've
> > > retained the stock exhaust system, as I drive it to and from the races
> > > and prefer to be able to listen to the stereo.  But up at 160, we have
> > > to yell to be heard.  The older Z06s like mine have minimal sound
> > > insulation.  Depending on the surface, road noise can be a problem.
> > >
> > > I have a GPS installed to get accurate speed readings, but the timing is
> > > all done with stopwatches.  We survey the course using a GPS, create
> > > course notes based on the GPS readings and then a handheld stopwatch to
> > > calculate the difference between actual and theoretical time.
> > >
> > > Speedo on the Corvette is fairly accurate.  Indicated 160mph is actually
> > > 163mph (measured by the GPS).
> > >
> > > Bob
> > >
> > > -- Paul Bennett <pbennett [at] macnet.com> wrote:
> > > Thanks for Utubing that.  Your car is amazingly quiet - virtually no
> > > engine/exhaust noise and little road noise.
> > > The road looked hypnotic at that speed.  What was the car spacing?
> > > And was the timing (called out by passenger) by GPS?
> > >
> > > >I ran the Corvette in the Big Bend Open Road Race last weekend.  The
> > > race runs from Fort Stockton to Sanderson in West Texas.  Got a first
> > > place finish in the 145mph class, averaging 145.009mph over the 118 mile
> > > course.  Dodging deer, buzzards and wild pigs.  Only vaporized one small
> > > bird, and a bunch of bugs.
> > > >
> > > >Just for fun, I uploaded a video of part of the race onto YouTube.  If
> > > anyone is interested, the URL is:
> > > >
> > > >http://www.youtube.com/watch?v=9vdapNrApM4
> > >
> > >
> > >
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