Re: [DML] Upgraded Front Suspension

[Marc Levy <malevy_nj@xxxxxxxxx>]

Flexing a bar in your hand is NOT the same thing as having the bar mounted in a car, with 4 points on the bar fixed to something solid.  

After the post below, I was informed that the Lotus ARB is NOT attached to the LCA with a nut.  It just floats in the bushing so it can slide in and out with the normal arc of travel.  (I have not confirmed this to be true)

Even so, you reposting all of my messages is only working to prove my point-  I expressed CONCERN with this modification, suggesting that people who try it keep an eye on other parts of the system.  I don't think I ever told someone not to do it.  As I have said before, I am considering a similar modification to my own car. 

FWIW, just like a gambler only tells stories of when they win, I doubt anyone who has had a problem with a modification like this is going to come on a public forum and talk about the failure.  I know of at least one car with the "outriggers" that had some font end issues after it was installed..  Was the problem caused by the modification?  I don't know for sure...  but that is the difference between you and me Bill, I know enough about engineering to realize I don't know enough about engineering to be making bold claims (like you)! 


--- On Wed, 5/2/12, content22207 <brobertson@xxxxxxxxxxxx> wrote:

> From: content22207 <brobertson@xxxxxxxxxxxx>
> Subject: Re: [DML] Upgraded Front Suspension
> To: dmcnews@xxxxxxxxxxxxxxx
> Date: Wednesday, May 2, 2012, 12:54 AM
> Another message in which Marc seems
> very concerned about swaybar travel when LCA wiggle is
> reduced/eliminated.
> 
> I can only assume Marc has never flexed a sway bar in his
> hands. They are bendy as can be (which BTW is what makes
> them so unsuitable as faux backwards thrust arms). By virtue
> of its 45 degree bends, the swaybar is only halfway removed
> from being nothing more than a simple piece of 1" round
> steel. Picture in your mind how bendy a 1" steel bar would
> be under the force of sway bar travel -- that is what the
> original LCA design is dealing with. That is why OEM front
> ends are wiggly as sin without Ed's brackets. And that is
> why the sway bar has no problem flexing slightly with Ed's
> brackets in place.
> 
> For good measure I did turn my sway bar bushings around
> backwards so the bar presses into an empty space through the
> LCA's travel rather than pressing into solid rubber:
> http://sphotos.xx.fbcdn.net/hphotos-ash4/431704_346599712051952_100001057778755_1036464_226120052_n.jpg
> http://sphotos.xx.fbcdn.net/hphotos-ash4/420057_346599788718611_100001057778755_1036465_639163264_n.jpg
> 
> Perhaps it would help Marc to remember that I am not the
> first owner to install Ed's brackets. They are not an
> experimental product -- they were service tested for many
> years before I ever bought my first set.
> 
> Perhaps it also would help Marc to remember that I purchased
> my Uding brackets from a United States DMC franchise, not
> from Ed directly. Surely they have Houston's blessing. 
> 
> Bill Robertson
> #5939
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx,
> Marc Levy <malevy_nj@...> wrote:
> >
> > I think Mike is also the guy who said at Eurofest 2006
> that he hand built a wishbone LCA for testing.  The 2
> statements seem to be in conflict.  Which is the
> "better" design, a LCA that cannot move forward/aft? 
> or one that moves with the arc of the ARB?
> > 
> > Just out of curiosity, anyone know how it is done on
> the Lotus Esprit?  Had the same thought on the rear ARB
> discussion (even though Esprit is MID engine, and may not
> have the same issues).
> > 
> > --- On Wed, 10/26/11, Martin Gutkowski
> <martin@...> wrote:
> > 
> > 
> > > Castor is dynamic thanks to the arc
> > > traced by the ARB. It passes through positive and
> negative
> > > castor deliberately as the suspension oscillates.
> I'm no
> > > expert on this stuff, I'm passing on what Mike
> Loasby told
> > > us. 
> > > 
> > > Martin
> > > 
> > >
> >
> 
> 
> 
> 
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> 
> 


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