The Triumph Dolomite Club - Discussion Forum

Carledo wrote:Calipers from a Sierra 1.6 or 1.8 model will go under Sprint wheels. The 2 ltr calipers, though larger will still fit the TJ conversion brackets, but the Sprint wheels will no longer fit. I believe (though i've not tried it) that 1 or 2 of the Escort mk6 calipers will also do the job (seeing as how Sierra calipers are getting thin on the ground in scrappies)

Steve

Sorry to correct you on this but....

The 2 litre calipers are exactly what the conversion uses and always was so, the ones that are bigger are all the XR series and of course the Cosworths as all these use larger discs and calipers to suit.
The standard sprint alloys will still fit however on some cars due to manufacturing variables a little grinding off the caliper is required.
These calipers are getting thinner in scrappies but because so many kit cars use them there stacks available from recon people.
Xr3 Xr2 Orion etc use them too.
The rare parts now are the caliper brackets as these dont come with recon calipers.

The KA is now common in scrap yards and it has 239 mm vented brakes on the 1.2 16v so Sierra parts are not the only source.

Oh do you need the Ford mounting bracket as well as your one trackerjack
http://pages.ebay.com/link/?nav=item.vi ... 05&alt=web

I'm planning on bidding on this pair which I think are the right size but do I need some extra bits too?

You have what you need in these and they are a perfect example of the corrrect caliper as all calipers have a different shape hole in the back and looks like a short Xmas tree, the wrong ones have a long slot or are like a tall Xmas tree. This makes them easy to pick out when searching.
The KA that has 239 mm discs fitted uses a slighty smaller caliper which certainly does the job but is different (sierra 54 mm pistons KA 48 mm I think)

The slider brackets are definitely fitted to these calipers that you have found however be prepared to bid a bit for them.

These will bolt directly to my brackets

trackerjack wrote:

Carledo wrote:Calipers from a Sierra 1.6 or 1.8 model will go under Sprint wheels. The 2 ltr calipers, though larger will still fit the TJ conversion brackets, but the Sprint wheels will no longer fit. I believe (though i've not tried it) that 1 or 2 of the Escort mk6 calipers will also do the job (seeing as how Sierra calipers are getting thin on the ground in scrappies)

Steve

Sorry to correct you on this but....

The 2 litre calipers are exactly what the conversion uses and always was so, the ones that are bigger are all the XR series and of course the Cosworths as all these use larger discs and calipers to suit.
The standard sprint alloys will still fit however on some cars due to manufacturing variables a little grinding off the caliper is required.
These calipers are getting thinner in scrappies but because so many kit cars use them there stacks available from recon people.
Xr3 Xr2 Orion etc use them too.
The rare parts now are the caliper brackets as these dont come with recon calipers.

The KA is now common in scrap yards and it has 239 mm vented brakes on the 1.2 16v so Sierra parts are not the only source.

I bow to the master! Seems I was misinformed, a not unusual case!
The only reason I raised the increasing shortage of calipers in scrappies is that a) you need the carrier brackets and b) its handy to have some old calipers to avoid the exchange surcharge on recon ones from the factors

Steve

PS, Jon, while I have your attention, I have 15" rims on 1 car and 14s on the other. Did I hear that you can also do a kit to fit a bigger Golf disc and the XR calipers if not constrained by the Sprint wheels. Or is this more misinformation I have been given?

Well I managed to get those calipers and they are on the way so just need to wait on all the bits to arrive and I can get on with enjoying the upgrade
I understand I have to modify the old brake discs as well?

I bow to the master! Seems I was misinformed, a not unusual case!
The only reason I raised the increasing shortage of calipers in scrappies is that a) you need the carrier brackets and b) its handy to have some old calipers to avoid the exchange surcharge on recon ones from the factors

Steve

PS, Jon, while I have your attention, I have 15" rims on 1 car and 14s on the other. Did I hear that you can also do a kit to fit a bigger Golf disc and the XR calipers if not constrained by the Sprint wheels. Or is this more misinformation I have been given?

Master eh more like master baiter
Unless anyone knows better the Xr 260 discs will fit with the XR larger pistons as fitted to XR and Cosworths.
However you will have to machine the Triumph hub 72.00 dia leaving a wheel face to disc of 17.5 mm and of course bore out the Ford disc to 72.05 to fit.
The reason for the larger bore is that the Triumph hub is hollowed out for grease so do not turn smaller.
The standard VW disc in a larger size may well fit and it will have to be bored out to 66.6mm to suit Triumph standard hub.
Hope this helps.
Jon

The larger Ford calipers (260mm vented discs) as fitted to mark 4 XR3i and Orion models will fit a 240mm carrier and furthermore
the 260mm carriers also fit Trackerjack brackets......
So if the 260mm VW discs have the same offset as their 239mm brethren than I would say the idea is a runner .



You will almost certainly have to change the master cylinder for a bigger 7/8" (22.2mm) bore model......think Saab 99/900 and various other compatibles.


Ian.

Thanks Ian, that was what I was hoping to hear! Think I'll order me a pair of Golf 260s and compare them with the new TJ pair I have in stock for the Sprint, if they don't match, I can always send them back!
Jon, how much do you usually remove from the outer face of the Golf discs? Just enough to make sure they are flat, or a set amount?

Steve

Ah a good question!
I check them with a DTI and if its more than .02 mm I take the lightest skim off them as I would rather not touch them if possible.
I accept that they are mouted on the "wrong" face for our application.

You can pack some paper or shim on the mounting faces to get a parallel run, concentricity is not really important within reason.

Enjoy

Jon, you've got me thinking about doing your conversion (my current brake problem has sparked this idea off) and you mentioned using Ka callipers. I'm sure some Fiestas used the same callipers so that would give more options. I know of such a Fiesta that is parked in somebody's garage which will probably end up being scrapped (if it already hasn't been) and I could rob the callipers from it. I remember having to replace one of the callipers on this very car with a brand new one so I might not even need to do this.

You've given me plenty to think about.

Good luck! the Fiesta has a myriad of brake setups fitted but the key is 239mm vented and such a disc will have the calipers as well.

On XR3 XR2 and Sierra the disc is 24mm thick but on the smaller Fords this is reduced to 22mm or 20mm so the calipers will not have a problem with thinner discs.

Jon, thanks for the reply but I've been persuaded that the standard setup is fine for my 1850 auto so I'm going to get recon calipers from the Club. I only want to do my brakes once and get it right first time. The Fiesta I mentioned is indeed long gone so it wouldn't have been a go-er anyway.

If you get the chance Dave, try driving a car fitted with Trackerjack brakes.......
you'll not want to be going back to the standard type then, ever.

I ran a Sprint through the 90s being conscious that its (fully rebuilt) brakes were inferior to just about everything on the road even back then.
The availability of an uprated conversion was a key factor in the decision to return to a Dolomite in 2007. Money well spent.





Ian.

Hi all

Did I once see a set of trackerjack brakes with Puma calipers on?
I have bought a pair cheap with carriers, but I can't work out from the internet whether they are the calipers for 240 or 260mm discs.

I have a funny feeling I may need to sell them on and search again for some from a KA or sierra.

Thanks in advance

Tom.

I have a set of 1.7 litre Puma calipers and carriers - with discs. They are intended for my Sprint which is now on 14" fake Minilites so no problems with clearance and the caliper carriers fit the TJ brackets. HOWEVER the discs are NOT 240mm. I will remeasure them tomorrow cos I can't quite remember but something rings a bell at 258mm. These will NOT fit under Sprint alloys! Pistons in the calipers are 54mm, same as the Sierra ones so no problem there but I can't use the Ford discs as the offset is too big. I will be ringing the factors soon to see if they can find me a set of Golf offset discs in a diameter to match the Puma ones and go from there. Then either get them machined and drilled locally if I can or send them to Jon to be sorted!
If you are interested Tom, I have a new pair of TJ converted 239mm Golf discs which are surplus to my needs - make me an offer!

Steve