[Shotimes] Eibach springs with stock struts?

[Dave Garber]

Then why doesn't the rear act the same way? The rear of the car rides
great - whether I have two 230lbs+ adults back there, or whether I have
no one back there. It's just the front.

I've replaced springs in other cars I've owned without changing
shocks/struts and never experienced this school bus bouncy ride before.
Sure, the ride gets stiffer, but never bouncy like this thing.


Dave Garber







> 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.