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Re: [Fot] TR6 Shim Packs

To: fot@autox.team.net
Subject: Re: [Fot] TR6 Shim Packs
From: Larry Young <cartravel@pobox.com>
Date: Wed, 09 Feb 2011 15:03:12 -0600
I think the basic geometry is the same as for a TR3.  I was curious to 
see how well 3/16 agrees with the number in the little report I wrote -  
http://www.tildentechnologies.com/downloads/TRsuspension.PDF. The 
formula gives a 0.174 in/deg, which is very close to 3/16.  I was 
rereading that stuff I did back when I reworked the suspension on my 
TR3.  It's been so long I don't even understand what I wrote, so it's no 
wonder no one else does.  It does have accurate numbers for the geometry 
measurements though, so it could save time for anyone wanting to look at 
suspension mods.
Larry

On 2/9/2011 10:25 AM, Richard Good wrote:
> Dan,
>
> I would not trust any general rule for number of shims.  For initial 
> setting, sit the frame on jack stands and shim it till it is level.  
> Then with the spring out, position the suspension at your best guess 
> of normal ride height.  You can calculate from frame to ground 
> clearance or spindle to fender height or whatever reference you have.  
> Then shim the suspension to get the desired camber angle measured on 
> the face of the hub.  Harbor freight sells a magnetic, digital angle 
> gauge for $30 that works nicely.
>
> I figured out the camber change per shim a while ago.  If I remember 
> correctly both lower brackets had to move about 3/16" to change one 
> degree. That is three shims on each bracket.  Or 4 on one and 2 on the 
> other if you need to change castor.  So I guess you could say a total 
> of 6 shims for one degree or 1/6 degree per shim.
>
> Regards,
> Richard Good
> Good Parts
>
> ----- Original Message ----- From: "Dan Cronin" <adcronin@mi.rr.com>
> To: "FOT List" <fot@autox.team.net>
> Sent: Wednesday, February 09, 2011 9:12 AM
> Subject: [Fot] TR6 Shim Packs
>
>
>> 2/9
>> Will try re sending this after a failed attempt last evening.  Does 
>> anyone
>> have information on how many shims to start with in setting up the 
>> TR6 front
>> suspension?  Also, just what fraction of a degree of movement one 
>> shim results
>> in?
>> Thanks for any input you can provide.
>> Dan
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