[Shotimes] Eibach springs with stock struts?

[Zach Leahy]

Ah, spring-mass-damper systems...  

ya'll take differential equation in college?

it's a second order (ax'+bx+c=0) system and you are changing some of
the terms by changing the springs.  Particularly you have affected the
'b' term in the equation.  Now, without having real numbers to work
with, I would say that you probablt don't want to make b larger
without making a larger as well.

In real world terms, the spring creates more force now, and the
dampener (if as stiff, or potentially less) cannot counter the higher
foces (bx) that the spring generated.  the end result is an
ocillation, and a quesy feeling, and jokes about hydraulics.  I would
say that you need to increase the dampener effect in front.  I think a
good approach would be to look at how stiff these are compared to what
came out, and what possiblilites you have, and then select something
with better damping force.

Z

PS, i use an eibach/tokico setup on all 4 corners and find it quite good.


On Wed, 23 Feb 2005 10:11:52 -0500 (Eastern Standard Time), Carl
Prochilo <gr8sho@prochilo.myserver.org> wrote:
> Dave, I recently replaced the worn Tokico strut inserts in my 92.  What
> was happening is that when going over speed bumps or hitting a dip in the
> road, the front of the car would undulate 2 or 3 times before it would
> settle down.  Very disturbing.  After I replaced the strut inserts, that
> same dip in the road has the front of the oscillate once and stops.
> 
> So based on your description, if the car bounces excessively, and you feel
> the struts themselves are in good working order, then they most likely
> don't have enough dampening force to compensate for the progressive rate
> Eibach springs.
> --
> Cheers,
> Carl Prochilo
> 92 Ultra Red Crimson
> 
> On Wed, February 23, 2005 9:30 am, Dave Garber said:
> > Hey guys,
> >
> > I've got a question concerning struts. My car is currently running
> > Eibach springs with GR-2 struts. The car rides like a school bus (the
> > front end bounces like crazy!) and I was thinking about going to a stock
> > Motorcraft strut. Now, I've heard that the car rides like this because
> > of the Eibach springs, as the GR-2's are essentially a stock replacement
> > strut. Is this true? Would new Motorcraft struts with the Eibach's ride
> > like this? I mean, this thing bounces so much that I've had a guy ask me
> > if I have hydraulics on the car! It's the worst riding car I've ever
> > owned!
> >
> > I should note that the rear of the car rides great. It's just the front
> > end. It literally bounces almost non-stop on anything other than
> > perfectly flat roads. You start to get used to it after a while, but
> > then I'll hop in my 99 and realize just how BAD the 94 really is. I find
> > it hard to believe that this is simply the result of running slightly
> > stiffer springs on a stock style strut. I think it's more likely that
> > these GR-2's just suck (at least the fronts. they are made in China, and
> > the rears are made in Italy). Anyone have any thoughts?
> >
> > Thanks!
> >
> >
> > Dave Garber
> > Pittsburgh, PA
> > 99 White, 79k
> > 94 Blue MTX, 191k
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