Miata Mailing List: August 1999, Message #190

sponsored by

----- Original Message -----
From: Jyri J. Virkki <jyri@virkki.com>
To: <mcg@home.com>
Cc: Miata Net <miata@realbig.com>
Sent: Monday, August 02, 1999 4:47 PM
Subject: Re: Ground Control (continued...)


> > Ouch!  My setup rides with more control & comfort at speed on the
> > interstates than it did stock -- def. no bump stop riding!
>
> Are you sure?  What spring rates are you using with the Eibach kit?

Well, I guess I can't truthfully say absolutely positively 100% not
guilty -- err, sure that is.  :)  I know what hitting the stops feels like,
& the car isn't doing it around town or on my rather lead-footed run to &
from TH.  (including gps top speed of 121.6)

Regarding the spring rates, Eibach claims these are progressive springs &
doesn't quote rates. :(  Visually they appear to be simple linear springs.
If you really want to know contact Eibach, perhaps they'll give out the
info.  I'm using the "pro-kit" springs for the m2, part # 5535.140.

> I'd bet you are riding the stops, just can't feel it.
[snip]
> According to David Gould's post, the spring rate of the stock length
> bumps stops starts out very soft, a lot softer than the springs, so it
> would be really hard if not impossible to actually feel it. I think
> that if you try the tie wrap test, they will probably be on the bump
> stops.. (and if they're NOT, please let me know as I'd be really
> interested then.. still researching this issue..)

Could be...The bump stops are really tall, and if I recall correctly did
have a shape like 2 disks stuck together.  Perhaps the upper disk is softer
than the lower one?  I'd be happy to do the "tie wrap test" for you if it
doesn't require removing the shocks.  :)  Please re-cap the test method or
forward David's post via private email.

John M.