This is something I’ve been thinking about for a little bit but not had the want or need to make a set of fabricated uprights, and I’m not confident enough to make them a commercial product.

I’ve already got some measurements to possibly start on a like-for-like copy of the uprights, but something I’m experimenting with is making a set of handed uprights which would be lighter still. There would also be scope to build-in a version of the Trackerjack kit so it wouldn’t need lugs cutting off.

Again, it’s very very early doors so I can’t guarantee anything at the moment, but this is where I’m currently up to:

how much do the upright weighs, is the weight saving worth all the work?

The original Triumph ones weigh a fair bit!! more than I was expecting when I took them off, Maybe around 5kg but someone else will probably have better info.

Estimated for the one above was around 1kg

And it’s a reduction of unsprung mass which more effective

Im using alloy front hubs on mine,theres a lot of difference in weight,ive also got bigger stub axle

Dave

What’s the bigger stub axle? And I would have gone for the alloy Hulu a initially but I was cost limited at the time and the iron hubs were much cheaper than the alloy ones.

I do intend on going to alloy hubs when I can afford them.

The original Triumph ones weigh a fair bit!! more than I was expecting when I took them off, Maybe around 5kg but someone else will probably have better info.

Estimated for the one above was around 1kg

And it’s a reduction of unsprung mass which more effective

I reckon its nearer 2-3 kgs. Got a pair on the bench now. Will try and weight them

For a alloy version, i wouldnt even consider it unless you can get an FEA analysis on it first. Certainly not if you sell them.

Id be surprised if there is enough money it though.

Your going to need to beef up the steering arm mounting points.
I know is only a drawing at this stage it is in need of much more strengthening.

Providing you copy the original mounting points and location of the original vertical upright.
There shouldn’t be any issues with bump steer ETC unless Triumph got it wrong to start with.


Large stub axle.
What are you guys using and from where.
Are these for Escort or Triumph hubs.

You mean the lower ball joint mount? Are these known for flexing or breaking? I’ll definitely consider it.

And I’d more than likely copy it so it’s a drop in part. I have looked at the triumph suspension to find out camber curves and caster angles but haven’t looked at bump steer yet as I haven’t had the time to model up the steering rack and subframe fully yet, I just have a half-ok representation of the suspension mounts and arms.

And this would be a direct replacement for the stock triumph upright. Which can be used with the Sprintspeed stub axles to use a Ford Escort RS hub, either alloy or iron. And I’d never heard of a larger bearing stub axle available for the Dolomite till someone here mentioned it so if the GT6 one works, I’d go with their knowledge and judgement. And seeing as the ST parts for the triumph seems to be just parts off other triumphs, I’d guess that it’s likely that the better hub axles would be GT6