It being really quiet at work at the moment, the mind wanders on more usefull things like rear disk brakes .

From searching the forum I gather that if you use the Hub or hubcarriers from a uno Turbo they are a direct bolt on.
So I went to look on Eper but am stumped as to which part it is, same goes for the mountingplates.

and how about the calipers, were they used on any other type of Fiat? (or even another make of car?)

You could try looking at this site to see if any parts numbers match for the calipers.

BUT, aside from the bling factor (and not so much hastle adjusting the handbrake) it's nothing like as worthwhile as the Punto GT front brake conversion. The rear brakes do very little on these cars.

The Punto rear disc conversion is the easier one to do. It uses the cento front dics, which fit directly to the hub. All that needs to be made up are caliper brackets, the picture for which is under one of the Punto brake conversion threads.

Cheers

SPD

rallycinq said:

The Punto rear disc conversion is the easier one to do. It uses the cento front dics, which fit directly to the hub. All that needs to be made up are caliper brackets, the picture for which is under one of the Punto brake conversion threads.

Cheers

SPD

Click to expand...

how the #%$&*! did I miss that one...

will this work with 13" wheels
will the balance be right with uno turbo fronts?

Balance will be OK. But PGT are better front brakes -- bigger disks, more swept area: you can't beat the physics.

fingers99 said:

Balance will be OK. But PGT are better front brakes -- bigger disks, more swept area: you can't beat the physics.

Click to expand...

But PGT front brakes will not fit under 13 inch wheels.

Of course PGT rear brakes fit under 13 inch wheels, they use standard cento front discs, so if they fit under 13s at the front they sure as heck will fit under 13s at the back.

Pad material and the ability to keep that ,aterial within its working range has more bearing on braking efficiency than size.

To ensure good balance on a disc braked rear you need calipers with the smallest piston size possible.

Cheers

SPD

That sounds about right.

Of course, feel has to be factored in there somewhere, as does availability of decent -- street -- 13" tyres: brakes are nothing without tyres and suspension.

Still, I've yet to have anyone who has run both set ups tell me that they prefer the UT set up.

One day we'll have to formulate some kind of braking contest............

fingers99 said:

That sounds about right.

Of course, feel has to be factored in there somewhere, as does availability of decent -- street -- 13" tyres: brakes are nothing without tyres and suspension.

Still, I've yet to have anyone who has run both set ups tell me that they prefer the UT set up.

One day we'll have to formulate some kind of braking contest............

Click to expand...

I have no complaints about my UT setup, its done a few selectives without problems, mind you my one good set of M171s is nearing the end of their life. Wherever am I going to get another set?

Cheers

SPD

uno turbo front caipers fit under 13" wheels tried and tested

rallycinq said:

, mind you my one good set of M171s is nearing the end of their life. Wherever am I going to get another set?

Click to expand...

Go ceramic, maybe? I did read that the early Elise used aluminium disks (unsure of whether they're plated, nikasil, or what) and ceramic pads. Would be great for hillclimbs and sprints, (think of the weight reduction alone!) but rallying is so hard on brakes.........

rallycinq said:

To ensure good balance on a disc braked rear you need calipers with the smallest piston size possible.

Cheers

SPD

Click to expand...

thanks for tghe info...any idea's on what to use?
Basically the rear calipers should have smaller pistons than Uno turbo calipers right?

bozothenutter said:

thanks for tghe info...any idea's on what to use?
Basically the rear calipers should have smaller pistons than Uno turbo calipers right?

Click to expand...

Not really. Its an answer I don't have as I have a balance bar set up on mine.

Cheers

SPD

The UT rears will be OK.

Martin (allanhelen) and I have both run disk/disk and disk/drum set ups back to back (both with PGT front set ups) -- both of us prefer the disk/drum, but there really isn't much in it. Put decent tyres on and the rears will be doing very little real work when you put the anchors on.

bozothenutter said:

how the #%$&*! did I miss that one...

will this work with 13" wheels
will the balance be right with uno turbo fronts?

Click to expand...

I've got UT brakes with the ventilated discs matched up to PGT rears using the same style discs as the normal fronts.

I have found the balance fine & you can actually get the rears nice & hot so it shows that they do something useful.

I swear by Pirelli P5000 175/50/13" tyres :slayer:

One day I'll have to try the Dragos.

But pricing them against the Uniroyals may result in holes in the wallet.

Thanks lads,

looks i'll be doing the fronts first, see how that feels, and maybe do the rears after evaluation

Had to dig this up again, as I have aquired a set of uno turbo rears.
calipers, discs, mountingbrackets, hubs, pads and he even threw in a master cylinder!

will the mounting brackets fit the Cinq rear arms?
Can I use the Cinq hubs or should I use the Uno Hubs?

Anybody who did this conversion know what length of braided brake hose to use in this conversion?

Any tips?

The simplest way of doing it is,

Cento hubs, cento front discs, UT calipers, made up mounting bracket.

Other than that would be trial and error.

I took the flexis right inside the car so have no idea how long you would need.

Cheers

SPD

found this topic!

https://www.fiatforum.com/cinquecento-seicento/161122-rear-disk-brakes-conversion-checklist.html

As you have all the UNO stuff, then yes the mounting brackets will bolt straight onto the Cento arms, same bolt holes as the drum back plate bolts to. You need to use the UNO hubs and 227mm discs with this conversion to ensure all offsets are correct.

Everything bolts on and is very easy to do, the only reason that many do the other conversion using custom brackets is because sourcing UNO brackets is very difficult now as the part is NLA at Fiat. And by spacing it out more you can then use Cento hubs and Cento front discs and get a slightly larger disc at 240mm but TBH offers no more than the 227disc does apart from maybe being cheaper to buy new, though would need to check that.

We have had cars with both types of conversion.

Master cylinder not needed.