it all seems an awfull lot of work/expense for how much gain?
Well set up standard disks work fine on the racer.

We have a saying here in oz when asked "why are you doing that?"

"for the same reason a dog licks it's dick!"

I'll be with my lna and gs boxes in a week so I will re assess then.

Thanks for the info Joolz, I'm glad you where looking out for me. Btw did you use gs or 2cv calipers?

Xheers

Harlwy

Not quite that simple, for two main reasons.

Oltcits/LNs/two-pot LNAs (stand away from Concannon's four-pot, nothing's the same) have 13" wheels, so the gearing's very different to Gs (15" wheels).

Oltcits/LNs/two-pot LNAs have the brakes hidden away behind the wheels, instead of where they should be.

The change from G brakes to Oltcit brakes is a simple one - the disks are vented, so thicker. As a result, the calipers need to have a bigger gap between the two halves, so there's an ally spacer. That simple. It's just a block of ally that matches the mating face between the two halves, with a hole for the fluid to flow, and a couple of holes for the bolts.

If you've got the calipers to hand, you can draw it up. The only other thing you'd need to know to get some made is the thickness - and having a vented disc and a solid disc to hand would tell you that.

If you REALLY need a set of discs, I _might_ be able to get some when we get to Romania soon, delivery to the UK late autumn. Maybe. But I'm REALLY not promising anything. They should be available in France, since Axels were sold there - which means you MIGHT be able to order them in the UK.

yeah but there is a definite "gain" in that

LNA Flanges = 125.5mm

GSA Flanges = 120.5mm

I used GS calipers, trying to make 2cv ones fit would just be extra ball ache.

To agree with Sean's thoughts, solid GS/A discs are designed to stop a car weighing 950kg, I'll be amazed if you can over heat them when fitted to a 600kg car. I went with solid discs because sometimes there's a budget limit, and sometimes it's more important just to get the car on the road.

Can you get solid GS discs easily enough? Having thought about it, what I would do would be to turn down the LNA flanges to fit inside GS discs, drill the discs to match the LNA/2cv bolt pattern, and then make a spacer to go between the disc and driveshaft. The spacer will be around 10-20mm and is needed because, oddly, the G-type 'box is narrower than a 2cv 'box.

The other option would be to use the GS output flanges, and then the discs would bolt straight up, but you'd need adapters for the driveshafts and I think the first way is easier.

Thx for the info guys.

I've sorted postage for the oltcit discs and calipers. Disc are 4.4kgs each so it is more economical under 10kgs.
I've also had a german 2cv nutter email some pics of vented discs mounted on lna.

And I've already had spacers machined to fit 2cv drive shafts on gs box.

Pics to follow!

Harley

Here are the pics my mate sent me.




Joolz, I like your idea of swapping out the flanges, but how do they come out... are they simply pressed?

I have also ordered a used set of Oltcit calipers, yes GS's are plentiful here in Aus but it will be nice to have some parts on the car that aren't frankensteined The Oltcit calipers are Dot 4 so I will rebuild them with GS seals.

Here are the hub spacers I had machined up.



This is all possible by using a Visa bellhousing and input spline...

toomany2cvs, thanks for the offer and knowledge!

I've just transferred the funds into an unknown Romanian account, lets see what turns up in 3 weeks

Cheers,

Harley

We like pictures! Yes, the flanges come out easily, They're held in by a locking ring with 2 small angled flats on it. You might be able to undo it with a chain wrench, but I knocked it round with a hammer and chisel. It took a little time, they're quite tight. Once undone it just pulls out, but you'll probably need to hit the back of it with a mallet, or lever it out with a piece of timber.
Citroen quote a torque setting for doing them back up, but what tool you're supposed to use I've no idea. I used the chisel again to 'quite tight' Nm.

You are right Joolz, my mate confirmed that the LN flange would need to be machined down to fit the GS disc.

I plan on fitting the GS output shafts on the LN gearbox, i'll check it out when I am with the gearbox again in a couple of weeks.

Cheers,

Harley

I learn't something today...
The Ln and GS gearbox drive shafts are not interchangeable


There is the slightest difference in the diameter of the spline...

As I already have the spacers made to suit the GS bolt pattern I will get the Ln flange reduced and drilled to take the GS bolt pattern and adaptor... I just realised if I did drill the actual disc brake, like in the photo, I could then use the the adaptors I have as a simple spacer, 1 bolt through Flange > Spacer/Adaptor > Drive-shaft...

Can you see any advantage/disadvantage one way or the other?

Harley