I can help here - When we put these on Katie Elder's '99 we had the factory
Bilsteins to reference against.
We measured the Bilstein first from various points and various methods
(using a micrometer). Our methods were semi-crude, but repeatable. The
MazdaSpeed shocks indeed were low in the rear - as to specific amounts, 2mm
sounds right. Another thing that was considered was the droop in the lower
bushing on the Bilstein - since it had been on the car, it had been
'squished' (I know, a technical term :-) up, thus minimally lowering the
car, so that has to be taken into consideration when comparing against a
never installed shock.
I knew Alan had the same shocks and emailed him about this - he agreed that
the rear were lower.
Ask anyone who had deal with putting Koni's on an R-package car before Koni
came out with their extra perch groove - you measure, measure, measure...
BTW, I do think that Koni did not get right the perch height on their middle
'R' groove on the rear shocks. - I have two of these on a shelf in the
garage, and everytime I measured them, they came up lower than a Bilstein...
Another BTW - remember, the rule says that the perch can be no lower than
the factory one - error on the safe side...
Preaching mode off...
Kevin McCormick
> -----Original Message-----
> From: Craig Blome [mailto:cblome@yahoo.com]
> Sent: Thursday, January 28, 1999 6:24 AM
> To: Alan Dahl; autox@autox.team.net
> Subject: Re: 99 Miata suspenion
>
>
>
> Alan Dahl <adahl@eskimo.com> wrote:
> >
> > get it right, the perch heights on the '99s were examined at two
> events
> > (Denver and Nationals) this year.
> >
>
> Out of curiosity, how do they measure perch height on the car to
> within 2mm accuracy?
>
> Just being a doubting Thomas,
> Craig Blome
>
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