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Re: Vixen front spring free lengths and rate? 2222222

To: russell.towns@kvaerner.com
Subject: Re: Vixen front spring free lengths and rate? 2222222
From: Dr John Upham <webmaster@ukmotorsport.com>
Date: Wed, 03 Jan 2001 10:36:02 +0000
Russell,
   Thanks. If you get a chance can you measure the distance between
   the lower bolt eye on the damper unit and the top of the lower
   spring platform. I can then compare that with the Koni unit.

   Regards,

   JU

russell.towns@kvaerner.com wrote:
> 
> John
> 
> I believe that both Matt and I use 130 lb/inch with 14" free length on
> Monroe shocks at the front. The back is either 130 or 2 x 65 as with
> yours..
> 
> Have you tried the scientific method to calculate your ratings?
> Assuming your springs are 13" and 185 if they are compressing by 3" then
> the weight at the front is 6 x 185 = 1110.
> If you want them to compress by 4" then divide 1110 by 8 = 139
> 
> I would have thought the difference between 130 and 185 would make about
> 1 - 1.5" difference. So with a shorter length you should not have been
> far off. What size are the collets that hold the spring on the shock?
> 
> All guess work though. Good Luck!
> 
> Russell
> 
> -----Original Message-----
> From: tvrdude@netzero.net [mailto:tvrdude@netzero.net]
> Sent: Wednesday 3 January 2001 02:45
> To: webmaster@ukmotorsport.com
> Cc: tvrdude@netzero.net; tvr@autox.team.net; Towns, Russell
> /JBEC-Portsmouth,IT; russell@hockerley.freeserve.co.uk;
> mtowns@westsussex.gov.uk
> Subject: Re: Vixen front spring free lengths and rate? 2222222
> 
> John,
>  Sorry, just thought of other things. where are you measuring the extra
> 1-2"? If at the bumper in front, this would be greater measurement than
> at the wheel. Raising the rear would drop the "front bumper" more if
> that
> is your desired outcome.
>   Bill
> 
> Dr John Upham wrote:
> >
> > Dear All,
> >      The front of my Vixen S3 is sitting too high. The rear seems
> >      about right on
> >
> >      4 x 65 lb/inch (measured on a spring compressor
> >      at Reading University) of 14" free length
> >
> >      The fronts are 185 lb/inch and 13" free length (I think
> >      but not sure).
> >
> >      Bearing in mind I'm using a 1600 Kent Crossflow engine with
> >      an alloy bellhousing, can anyone recommend some front
> >      spring spec figures please?
> >
> >      I reckon the car is nose up by around 1-2 inches too much.
> >
> >      Best Regards,
> >
> >      John
> >
> >
> >
> > --
> > Dr John Upham, The UKMotorSport Index,
> > http://www.ukmotorsport.com/, webmaster@ukmotorsport.com,
> > Voice: +44 (0) 976 634 053 (W), Voice: +44 (0) 125 287 2551 (H),
> > Voice: +44 (0) 976 634 053 (M)
> > Registered address: Reid House, Mill Hall, Cuckfield, West Sussex RH17
> > 5HX
> > Registered number: 3445711
> 
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-- 
Dr John Upham, The UKMotorSport Index,
http://www.ukmotorsport.com/, webmaster@ukmotorsport.com,
Voice: +44 (0) 976 634 053 (W), Voice: +44 (0) 125 287 2551 (H),
Voice: +44 (0) 976 634 053 (M)
Registered address: Reid House, Mill Hall, Cuckfield, West Sussex RH17
5HX
Registered number: 3445711

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