[TR] Rack & pinion conversions for TR3's???

[Alan & Lyn Dunscombe]

TeriAnn

In my opinion this is the best single thing you can do to a side-curtain 
(real!) TR

Like Tom I went for the more expensive Revington conversion which comes 
with brackets to weld onto the chassis to mount the R&P in exactly the 
right place to eliminate the bump steer. (it is however quite expensive, 
but a very complete kit & the rack is modified to the correct length so you 
do not introduce extra bump-steer)

I believe the Moss one bolts onto the old steering mounts and is not quite 
so rigid,
but more importantly does introduce some unwanted bump-steer.

The steering arms are reversed & spaced closer to the discs to correct the 
Ackerman angle in the steering geometry that was incorrect from the factory 
until the factory installed R&P with the TR4's. This, along with the 
elimination of all those silly relays & ball joints etc. transforms the 
driving experience more than anything else I have done to my car ( & that 
is quite a few things over a 30 year period !)

There are a couple of drawbacks with the Revington conversion ( I am not 
sure if it applies also to the Moss one but would think that it does...)
because you install a complete new steering column you cannot keep the horn 
or indicators in the middle of the steering wheel, easily fixed but does 
alter subtly the look of the car.
Because the rack is lower geared than the original steering it also pays to 
install a smaller "After market" steering wheel to compensate for it, a 15" 
wheel looks quite ok in my opinion and can add a touch of class to your 
cockpit.

Go for it, you will not regret it I assure you,

regards from "The Deep South"
where it is summer time now...


At 12:00 p.m. 17/12/2009 -0700, you wrote:

>------------------------------
>
>Message: 2
>Date: Wed, 16 Dec 2009 14:03:22 -0800 (PST)
>From: A Daniel Cronin <adcronin at ameritech.net>
>Subject: Re: [TR] Rack & pinion conversions for TR3's???
>To: 'Triumph List' <triumphs at autox.team.net>, Randall
>         <tr3driver at ca.rr.com>
>Message-ID: <794444.57859.qm at web81308.mail.mud.yahoo.com>
>Content-Type: text/plain; charset="us-ascii"
>
>The steering arms are reversed to throw the tie rod end as close to the brake
>disk as possible, the theory as I understand it is to lessen "bump steer".
>Unequal spacers were also used to further offset the connection point on the
>steering are---3MM is about right according to Revington TR.
>
>
>Regards,
>Dan Cronin