Thanks Nolan - insightful as ever...
This whole trunion breaking thing - surely if the castor has been set to
Triumph spec then everything will be ok... ? Or are you saying castor
shouldnt be set - and it should be a by-product of the toe?
I can of course check all this by looking at the shims - and if I
remember correctly there were uneven amounts - so it seems it was adjusted.
Thirdly.... as castor is a part of the toe settings - surely they cant
charge me for doing both! Possibly...
James
Nolan Penney wrote:
>No, caster is adjustable. It's adjustable the same way it is for any
>production double a-arm front suspension car. You use an unequal
>quantity of shims under the lower a-arm mounts to "tilt" the arm forward
>or back, changing the castor.
>
>The caveat is that a Spitfire doesn't use a double ball joint
>suspension, it uses a trunnion on the bottom instead. The trunnion
>only has two axis of rotation, not the three a ball joint has. So it
>doesn't take kindly to being shoved forward and backwards. This induces
>wear on the trunnion, and can lead to breakage. This is something I've
>been pointing out for years, that you've got to be careful about this
>with regards to Spitfires. Glad to see one of the louder nay sayers has
>finally seen the light.
>
>And, of course, the shop that worked on your car may not have adjusted
>it anyhow, and simply noted it incorrectly in their repair write up.
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