90q coil-over kits, spring rates

[Jim Green]

--- Brady Moffatt <bradym at sympatico.ca> wrote:
> Hi Jim/All,
>
> I'm no suspension engineer, but doesn't it seem
> strange that a correct
> Eibach Prokit bottoms out on the _street_? Hell,
> _stock_ springs shouldn't
> bottom on the street!
>
> It is the spring that controls the amount of
> suspension travel due to an
> input (bump, cornering). The shock only damps the
> motion afterwards. Right?
>
> So, bottoming  is due to the spring exclusively.
> Wallowing would be due to
> the shock.
>
> All of this means that your springs are too short or
> too weak. You're
> addressing the "too-weak" option. What about the
> other one? Is it possible
> that you have the now NLA 4kq Eibachs by mistake?
> (which I understand are
> shorter than 90q springs) I suppose a shock with too
> short travel could do
> it too, but that would be another case of possible
> incorrect parts.
>
> Has anyone else had trouble with Eibachs bottoming
> out? Boge TurboGas get
> rave reviews on this list when paired with H&R
> springs, so it's probably not
> their fault...

Good thoughts, here is my take on it, most of my
problem is due to the shocks.  I don't think they have
enough dampening to get the job done when your
suspension travel is reduced.  I had KYB's in there
and the BOGE's were a small improvemnet, but still not
enough.  You could be right about the 4kq springs, but
I thought I had verified them at one point.  The fact
is I really need some adjustability in the system.
Another 1/4" of height would keep my cat happy on our
lovely speed bump at work, or I could loose 50 lbs,
but I think I'll go for the coil-overs:)

=====
Jim Green
'89 90tq 034EFI, Haltech IG5
http://www.geocities.com/jeg1976/car_home.html

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