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Re: Monroe Shocks

Subject: Re: Monroe Shocks
From: "Eric L. Van Iderstine" <elv1@Ra.MsState.Edu>
Date: Mon, 9 Dec 1996 17:53:33 -0600 (CST)
Shocks are rated by a damping factor.  They work by trying to push some
fluid through an opening (so in adjustable dampers, you choose between
different oriface sizes...the larger the hole,the less resistance to

This damping factor is expressed in units of lb*sec/ft.

Carrera is the only company I have seen literature from as far as being
able to select different damping factors.  Even their catalog must be read
a little more throughly to find a number usable in an equation defining a
suspension system.  They give a lb force number for different shocks, but
reading between the lines, you can find that the number is based on a
certain velocity.

Other ways to change the damping from shocks is to change shock oil, with
a heavier, less viscous fluid having more resistance through the same dia
hole.  Another way is to change the angle at which the shock is attached.
If you have noticed the Moss (I think) kit has two different locations
that the shock can be bolted.  In doing this, you change the distance the
shock travels for the same wheel travel....lowering the velocity of the
fluid, hence less damping.


Eric L. Van Iderstine   -   elv1@Ra.MsState.Edu   -
Machine Development Engineer
HMC Technologies, New Albany, MS
74 MGB
96 Formula SAE

On Fri, 29 Nov 1996, BOB   NOGUEIRA wrote:

> -- [ From: Bob Nogueira * EMC.Ver #2.5.1 ] --
> Anyone know how the industry measures shocks? I have never seen shocks
> referred to by a rating or any other means other than "stiff "or "Heavy
> Duty" . The manufactures must have a scale they rate them on otherwise
> how would they cross referance them?  
> Part II,  If they do rate them,  why would Spax or Armstrong be any
> different  given the same rating? ( excluding longevity )
> Bob Nogueira
> -------- REPLY, Original message follows --------
> > Date: Wednesday, 27-Nov-96 10:00 PM
> > 
> > From: Danddtietz               \ America On-Line: (DandDTietz)
> > To:   Bill Mills               \ Internet:    (
> > cc:       \ Internet:    (
> > 
> > Subject: Monroe Shocks
> > 
> > Hey Bill,
> > 
> > The shock supplied with the MOSS/Monroe rear kit (actually front &
> rear, except
> > the rear shocks have the dust skirt over the plunger) is Monroe 33076.
> I saw a
> > previous listing that said these are TRUCK shocks, which I can believe
> (did I
> > mention they are STIFF!).
> > 
> > 
> -------- REPLY, End of original message --------

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