Pantera 06927

Stock rear rotors are a 0.81" rotor thus implying they would be 20.6mm new.

It sounds like yours have been resurfaced at some point.

Julian

Wow, maybe even a couple of times Julian. Looks like I better find some new ones.

Any idea about the front?

quote:

Any idea about the front?

My stock DT fronts say minimum of 19mm.

Larry

Thanks Larry. Mine are vented at the front, but even so, when down to 20.38, seems like both ends are well down.

Now the fun begins, to see if I can find rotors in Oz.

Just going through the workshp manual, which is all in imperial for some reason, and there are a number of sums written there for New and Refinished sizes.

Front - new 51/64" refinished 43/64"
Rear - new 47/64" refinished 39/64"

Hard for me to understand this so using the old grey matter calculator i thought I'd run a mathmatecal equasion over this to convert back to metric.

As an inch = 25.4mm I did the following:

25.4 divided by 64 multiplied by 51 gave me 20.24mm

Similar calculations gave me the following:

Front new 20.24mm refurbished 17.06mm
Rear new 18.65mm refurbished 15.48mm

Now someone please check the figures because this doesn't make much sense.

The rear solid rotors on my car certainly say Min thickness 17.5mm yet here's the factory manual telling me that 15.48 is the min.

Interesting also to see that Larry runs a stock DT fonts that say 19mm on them and here's the manual saying 17.06 min on the front.

Nothing is ever easy is it?

I'm trying to sort this out for two reasons.

1. The rear axle job is so intensive, I don't want to do it again in a year because my rotrs are down.

2. Rotors and pads are common wear items that must be available down here. They are probably shared with some other car and available from EBC dealer locally. I just need to go to EBC with the right dimensions and have them match up a set of rotors for me.

quote:

see if I can find rotors in Oz.

I replaced all four rotors last winter. The 65-66 mustang rotors are a perfect .81 thickness but vented match except for slight diameter differences.

Go here for a starting point:

http://www.poca.com/index.php/...ery/?g2_itemId=20370

Larry

That's great Larry. Vented rears as well. Excellent.

The 121.61053 says that it is a C-Tek standard rotor.

The 120.61053 says that it is a Premium Rotor - Preferred. I take it that they are better in some way?

You used a front Mustang rotor on the rear and found it to work just fine?

So both numbers are from the FRONT of a Mustang?

Measuring my rotors, the height of the hat from face of disc to mounting surface on the front are 36mm yet the rears are 40mm. This 4mm variation seems a lot and I would have thought that it pushed the centre line of the rotor back 4mm in towards the centre of the car?


Your Mustang rotors (as above) show a height of 58.6mm and a Nom thickness of 21mm, therefore giving a 'hat' height of 37.6mm.

1.6mm higher than stock fronts and 2.4mm lower than stock rears.

quote:

That's great Larry. Vented rears as well. Excellent.
Indeed

The 121.61053 says that it is a C-Tek standard rotor.
The 120.61053 says that it is a Premium Rotor - Preferred. I take it that they are better in some way?
.........As noted in the text, the company stated difference is said to be a better casting and a black paint 'e' coating. In my case, they both were the same higher grade casting, just one had the 'e' coating.

You used a front Mustang rotor on the rear and found it to work just fine?
.........Yes. Read the text with the photos closely. There is a diameter difference. It will result in some unswept pad on the rear. In practice, this is not really a problem. If it concerns you, take them to a machinist and have them turn them down to match the OEM diameter.

So both numbers are from the FRONT of a Mustang?
..........Yes, but again, read text closely. Due to continuing difference in suppliers, make SURE the #'s currently match to just the rotor, not the one-piece hub and rotor unit.


Measuring my rotors, the height of the hat from face of disc to mounting surface on the front are 36mm yet the rears are 40mm. This 4mm variation seems a lot and I would have thought that it pushed the centre line of the rotor back 4mm in towards the centre of the car?

.............I found the height of the new rotors to match the old rotors. They created no change in rotor position as far as centering in the calipers.

I was able to knock out the metric studs and drive them into the new rotors.

A very basic upgrade procedure with only minor issues.

Larry

Out of curiosity I went and looked at my old rotors (found them in a corner of the shed!) they indeed say min 19mm front and both were 19.8mm. The rears say min 17.5 and they were 17.8mm, so I guess they really can go out to trash next week.

When I upgraded rotors and brakes I used two piece rotors and hats and moved the hats outboard to make for easy disassembly next time.

Julian

Well what a day it was.

After measuring, procrastinating, and then measuring some more, I took off to visit head office of RDA which is Rotors and Drums Australia, our biggest supplier and also a subsiduary of EBC (UK and USA)

The only DeTomaso listings were for a 1990 Pantera with huge discs, or discs for a Longchamp!

So then I followed Larry's advise and asked about 65/66 Mustangs. Every early Mustang in the catalog were hub mount style rotors with the wheel bearings integral in the rotor, like on a trailer. There were no floating discs listed for any Mustangs.

The guy at RDA suggested that www.brakewarehouse.com are probably manufacturing a hub system to adapt to a floating style rotor. That's why theu offer the various styles of rotor to fit the Mustangs. Unfortunately, not having too many Mustangs, this isn't an option here.

Rotors are too damn heavy to ship so I'm going to have to continue the hunt down here for a suitable product.

So.......still at the drawing board!

I wouldn't use RDA, havent had a good pair of discs yet, they always seem to warp.
Try DBA better grade of iron.

Julian can you post the part numbers on the rotors and hats you purchased and what supplier they are from? Thanks.

Robert,

I'm not surprised your Mustang search turned up one piece castings. They are the most common now.

BUT, the original Ford pieces were two piece units. Press out the studs, and presto, separate rotors.

So instead of new pieces, NOS pieces should also work. If you can find them....

Larry

Problem down here is that we didn't have a plethora of Mustangs. We have a few now that they are old enough to be eligible for import, but certainly nowhere likely to have new old stock, or actually any stock at all.

I'll have to see if any other blokes come through with details of their brakes, ie: rotor diameter and thickness and top hat thickness and if they changed calipers to suit.

Given some more info, I'm sure I can find something suitable down here. Given my wheel size I'd like to have larger brakes under her anyway. I already have one Italian that doesn't stop, so it would be good to be able to slow this one down in half the distance it takes to stop the Testarossa......or better!

Not being able to locate a suitable replacement rotor for the car, I've decided to put it back together with the current rotors. Then I can take some accurate measurements of the caliper centred position, with and without pads in place, and then I can ascertain exactly what will fit onto the car.

For those Aussies out there, keep an eye on this thread for locally available parts when I can locate suitable rotors.

Work sucks! Keeps me away from the car.

Thanks to Australia still celebrating the Queens birthday, it's a long weekend here so we got a bit done on the car. Even the wife got into it, parked herself on the carpet in front of the pot belly stove and scraped 35 years of sludge from the half shafts and got them all ready to repaint.

A few more pictures of the rest of the suspension nearly ready to go back into the rear, and the front finished tonight.

Front

More:

And finally tonight I also had a chance to get the other muffler wired down and a coat of ceramic primer onto it.