Author Topic: AC Ace steering box?  (Read 112 times)

AEX 31

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AC Ace steering box?
« on: June 23, 2022, 15:06:01 »
Dear all,

AEX 31 has done something like 80.000 km and so has the steering box. With the help of a knowledgeable friend we replaced all the moving parts that we could so I guess it’s as good as it can get, without changing the worm and peg, so with modern Michelin X’s it’s tracking a bit at higher speeds.

So my question is simple, is there anybody out there that has a very good or even nos steering box or at least a new worm and maybe a column that they want to sell? To me!

I know one can buy new worms from TR specialists but I have also heard that the quality of these new worms aren’t very good. Also if anybody has any experience with new parts and tracking problems in general it would be interesting to hear about the experience that others with old Ace’s and Aceca’s have had.

Many thanks in advance for any input.

Kind regards

Jonas
« Last Edit: June 23, 2022, 18:33:42 by AEX 31 »

B.P.Bird

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Re: AC Ace steering box?
« Reply #1 on: June 24, 2022, 00:38:07 »
Jonas,
The Ace is not prone to tracking or tramlining, neither are Michelin X tyres.
I wonder if you have lost the caster self centering action by over tightening the adjustment  on the peg ? There should be some play at the steering wheel rim.
The cam doesn't wear like the peg and I would fit just a new peg and adjust the clearance to allow the wheel to self centre as soon as you relax your grip on the steering wheel whilst turning.
Fitting the front uprights on the wrong side gives you reverse caster angle and some epic directional excursions - I hope '31 has not suffered this insult.
Barrie

AK1161

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Re: AC Ace steering box?
« Reply #2 on: June 24, 2022, 08:08:52 »
There used to be a gentleman in Westcott ,Surrey who specialised in worm and peg boxes and about 10 years ago he overhauled mine.
I had a quick look on the internet but cannot find him........maybe a more in depth look may uncover his whereabouts........or maybe somebody else on the forum can shed some light on the matter.......
Sorry to be a bit vague.....Luke

Robin A Woolmer

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Re: AC Ace steering box?
« Reply #3 on: June 24, 2022, 11:14:43 »
MarlesWellerBox David Cornwallis is probably the guy they are on the web!
Robin

AEX 31

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Re: AC Ace steering box?
« Reply #4 on: June 24, 2022, 16:39:09 »
Many thanks for your input.

Barrie, I do think the uprights are fitted the correct way. Both sides have a positive caster of between 3 and 4 degrees. So hopefully no insult to the old lady (31!).

I will definitely try to let the peg sit with less force and see if that changes matters. I have also enclosed an image of the worm. Maybe hard to see but there is some wear, especially in the center of the worm. I do think my worm Is just worn, maybe from historical over tightening?

Regardless I do think that the modern Michelin X’s are rather different to the older ones. First of all the later versions have an almost 20 mm larger diameter, different thread pattern and probably a different rubber specification. I definitely feel a large difference to the older ones when cornering, the new type sticks to the road much, much better.

Robin, I have had some contact with the Marles company. I can see on their website that they have restored a number of the Bishops boxes for AC’s. Do you or anybody else on the forum have any first hand experience with them and the quality of their work?

A last thought I have is that toe in should play a large part as well. 31 is set up with roughly 0,25 degrees per side, which should equate to the 1/16 inch as it says in the handbook. Anybody with different opinion/experience concerning  toe in? I run the car with the original 16 inch wheels.

Thanks again.

Jonas