Mayf,
God I love it. Great post. Love all the technical stuff you give to the list,
you
are a major asset to us all.
But one thing Mayf, I didn't understand one apple you said. But it sure sounded
good.
Jon
DrMayf wrote:
> Warning....Warning...Will Robinson! Danger lurks ahead...from a wannabie non
> racer.....
>
> Well, the concept is simple, but the physics are a little more than simple.
> The system also includes the tire and spring of that subsytem as well as
> that of the rear end mass, the spring, and the shock, and of course the car
> itself! Interesting to note that the acceleration imparted to the "mass" is
> 90 degrees in phase from the damping which is 90 degrees from the
> displacement. The shock force occurs 90 degrees out of phase with the
> displacement. How bout them apples!
>
> mayf, the red necked, ignorant desert rat in Pahrump
>
> ----- Original Message -----
> From: "Keith Turk" <kturk@ala.net>
> To: <land-speed@autox.team.net>
> Sent: Wednesday, October 24, 2001 7:46 AM
> Subject: Shocks and suspension
>
> > Well after kinda soaking up knowledge on shocks for a couple of days
> > from some really bright people... here is what I think... Shocks work no
> > matter what the speed... the amount of compression or rebound a fella
> > decides he needs is directly related to what school of thought he
> follows...
> > But the basic physic's are still the same.... a Spring in a car reacts no
> > matter what the speed and the shock then has the ability to dampen that
> > movement.... bout that simple....
> >
> > As for the suspension ... well it works also..... BUT.... and it's a
> big
> > BUT.... Where and why one set up works better then another is Pure
> > Theory.... no one so far can tell me if a Four link set up is better once
> > the car is actually under power After the last shift... Most agree it's
> > better during changing moments... such as leaving the line or during the
> > weight transfer associated with shifting the car... Most also will tell
> you
> > that a four link set up is more tuneable.... Again thou... most agree that
> > if your not going to spend your time tuning the four link it's a waste of
> > money.... This isn't a Plug and Play option.... Dave and I had a
> > conversation a while back that has some merit at this point and it was
> that
> > tuning the suspension was usually about VERY fine incremental changes ....
> > as most the time the set up was designed to work within a very limited set
> > of parameters and most tuning is associated with fine incremental
> changes...
> > In other words it's good to about 95% of it's ability out of the box....
> > All this theory and so little time....
> >
> > Last part of this is noting the differences between a Dirt track car
> > that has to corner and a drag car that doesn't..... in a drag set up the
> > bottom bar is normally set level or slightly up hill..... with the top bar
> > aimed downhill...... the Dirt track folks do the exact opposite... they
> aim
> > the bottom bar down hill and the top bar up hill.... Oh and them dirt guys
> > have different length bars.... just to add more problems to the fray....
> >
> > Personally it's all interesting... but on the end of the day once your
> > past the 1 mile marker in the last gear.... the car is set.... the only
> job
> > of the suspension at that point is to allow the minimal travel associated
> > with irregularities in the salt... and to maintain the rear end in it's
> > location as it transfers the power to the salt....
> >
> > Okay.... lead on folks....
> >
> > Keith ( PS... Bob "Grib" Gribble was being WAY to shy about his knowledge
> of
> > Shocks.... he has had Several VERY high Dollar Shock guys work for him
> when
> > the business built and rebuilt shocks for the Winston Cup circuit.... He
> > really does know more about these then he was letting on...)
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