DDK - Die Deutschen Klassiker

Jonathan, fitted them on Tuesday morning, I did all as suggested, put a chamfer on the “leading edge” remembering that it is the one facing back towards the disc as it spins



Then the 3M anti squeal pads were cut to size and applied to the rear of each



So then took it for a 2 mile bedding-in drive with the usual 8 or so hard dabs of the pedal from 60 down to 20mph followed by an easy drive home, and not a squeak was heard.

Have now pressure bled the system and will get a chance to take the car out in the morning for a spirited run down to Killinchy and back. If there is any change I’ll report back


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Did you do front pads only?

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As said before by me, did you fit the 'L' shaped anti squeal shims? My A type fronts and M rear pistons have a cut away to take the shim thickness thus on application the pad is advanced to the disc 'flat' Ommision of the shims will make the pistons cock over IF your pistons have the cut away.

In using the £M pad I would fit it to the back of brake pad, then the shim then the caliper piston all all is flat and even.
Sorry if I'm muddying the waters.

Neil

Full set of lads front & back

Graham

I don’t have the shims, never had them and never had a brake issue. The cut outs on the pistons are orientated as per Porsche.

The drive tomorrow morning will tell if we squeal or we don’t, but it hasn’t to date.

So back from a scoot round the local backroads. The retardation is very impressive. Am getting an even pull across the axles. As to the squealing, absolutely zero apart from when I rolled it into the garage and there was a short squeak as I pressed the pedal at 5 mph. So it’s a good report.

I’m currently running drilled discs on the front and std on the rear.

Further update …………. I got the pads to squeal !!!

But only when In reverse, when rolling out of my fathers steep driveway. Ofcourse the reverse “leading edges” have not been chamfered, so that has to be the issue.

Otherwise a 30 mile drive and no other irreverent noises from the brakes. Great pedal feel and wonderful braking force. It will lock the front if you snap the brakes on hard, but I generally try to build the pressure up when braking and in this situation they really inspire confidence.


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Glad you’re pleased with them Mike!
I was testing mine out at Shelsley Walsh on Saturday. Maybe if I’d used them a bit less, I would have gone faster!

JW

Rereading this as I fitted cl 5+ pads to my 914. It improved the stopped. The brakes were quiet with an little noise. However, 500-1000 miles later they are stupidly loud. Enough to wake people up one street away. Initially I was able to stop the noise by pushing firmly on brake. Almost as if the half hearted contact was causing the noise. Now it's at any speed . Makes me wonder if it's because the backs have worn a bit and need adjusting. However, Keith seems to be running them without any issues. I will inspect the brakes, try the anti squeal pads when I get home

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Installed the early version of these pads about 12 years ago with fresh drilled discs all round.
Still in the 911.
Squeals are really bad at times, embarrassing even, some days less so.
Seems the price to pay to stop a 911 reasonably well.

I did say early in this thread!

jwhillracer wrote: ↑Tue Jul 05, 2022 2:57 pm I run exactly the same on our 914/6. They are bloody noisy, but nothing else I’ve tried stops like them - ask KS!

JW

I assume once you've got heat in them they quieten down ?

hot66 wrote: ↑Mon Jul 01, 2024 10:55 am I assume once you've got heat in them they quieten down ?

When they are used heavily in competition they are not too bad, but used lightly they squeal, at least as much when they are hot.
They are designed for competition, not as a comfortable road going pad.

JW

jwhillracer wrote:I did say early in this thread!

jwhillracer wrote: ↑Tue Jul 05, 2022 2:57 pm I run exactly the same on our 914/6. They are bloody noisy, but nothing else I’ve tried stops like them - ask KS!

JW

No experience of these pads specifically, but in the world of fast heavy cars I frequent at work brake squeal is an ever present problem. The requirements for repeated hard stops from high speed and a pad that maintains performance is completely at odds with them not squealing.

Some manufacturers have a special soft pad they give to customers that complain of squealing as they obviously don’t use the car properly

When I had mine in the 911 for the first time i was hillclimbing the car, but you do not brake often in a hillclimb run, sometimes only 2 times! (Shelsley Walsh).
When used HARD the pads do not squeal, just really really groan.

Road use they sure do squeal, tiringly so.
I've used my 911 twice this week on good runs to meetings and it all gets on my nerves, but the car will stop(!).

Just ordered some 3m anti squeal pads/paper and will try that on the front as John has done, only £5 for 4 pads. I will file the leading edges again too while the pads are out.

My car has the A type calipers on the front and the pads are free to move in them, a bit worn on the cast surfaces.

This does not help at all, noise come from movement, so I expect the pads are 'chattering' in the calipers under light road application, hence the high pitch noise.

I think the front pads are 6mm shorter than the pads, they replaced. That was according to the specs but I didn't measure. Maybe that difference is contributing to the noise but strange it came on after time. I put a bit of cooper grease onto the back of the pads when installing. Anti squeal pads ordered. The fronts are an straightforward install. The rears I need to man up and try

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