Porsche Anti Squeal Plates?

[John Sims]

I might fit my Big Blacks on Sunday, while I try to decide what to do with my suspension.

I bought a set of Porsche anti squeal disc things that fit on the back of the pad. - is there any point using these with Red Stuff pads?

It strikes we they just make it more difficult to remove the pads subsequently.

 

[Peter Empson]

I know Tony said his yellows were rather noisy, but mine were quiet (but I did only keep them on the car for a few hundred miles). I had red's on the rear too and didn't get any noise from those.

I'm convinved they're only a problem when they glaze over during normal road use, a dry trackday and the noise goes and doesn't reappear for a long time.

Not that they're related, but I'm rather taken by these, at the moment my car doesn't have anywhere near enough titanium after all:
http://www.racersedge-inc.com/racersedge/rehome.nsf/78c7bfeda53558a285257179006f75ff/94A91C2DB5584806852571FE0045DC6A?open&menu=menumodelbytype

 

[zcacogp]

ORIGINAL: Peter Empson

Not that they're related, but I'm rather taken by these, at the moment my car doesn't have anywhere near enough titanium after all:
http://www.racersedge-inc.com/racersedge/rehome.nsf/78c7bfeda53558a285257179006f75ff/94A91C2DB5584806852571FE0045DC6A?open&menu=menumodelbytype

Whoah! $80 for 4 sheets of titanium ... that's about £10 a sheet! Seems more than a little expensive to me.

A local metalworks which does work with this sort of thing would surely be able to help you out for much much less.


Oli.

 

[Peter Empson]

Good point Oli, they don't exactly look difficult to make! Might look into this when my wallet has recovered from the current expense []

 

[Fen]

I used them with my PF pads. They still squeal in light application when they haven't had hard use for a while. Luckily it doesn't bother me.

 

[zcacogp]

ORIGINAL: Peter Empson

Good point Oli, they don't exactly look difficult to make! Might look into this when my wallet has recovered from the current expense []

In fact, if someone would like to make some drawings of the right shape (which will pretty much involve putting a brake pad on a sheet of paper and drawing around it) then they could put them on this site somewhere ... if having titanium spacers in your brakes is really an advantage (which sounds a little dubious to me, but there we are.)


Oli.

 

[MarkK]

Hi John,
I had some track pads put in a car once by a race team(Eurotech) that didnt bother with the anti squeal shims(i didn't know this at the time)took the car out on track for the first time and i could hear the pads rattling(clicking noise) in the caliper when coming off the brakes,took it back to them winged about the noise and it was just the lack of shims,they put them back in,noise went away,so no shims means more rattly noises(if that sort of thing bothers you).They don't bother with them because they consider them a non essential and adds time/faff putting them in...

 

[sawood12]

I've not used the pukka Porsche anti squeal pads and i'm using EBC yellows all round. I get some squealing but a spireted drive that builds up head in the system soon sorts that out. A good liberal coating of coppaslip on the back of the pad seems to do the trick for me. I don't see how these titanium plates do anything for cooling at all.

 

[John Sims]

Thanks for your comments guys, I'm still undecided though.

With regard to the titanium pads: If, as they suggest, they act as a thermal barrier reducing the transfer of heat into the pistons and fluid where does this heat go? It must stay in the pads. [8|]

 

[John Sims]

It appears that titanium has approximately the same thermal conductivity as stainless steel - so you might as well use stainless steel shims. So why don't they?

 

[Peter Empson]

ORIGINAL: John Sims

It appears that titanium has approximately the same thermal conductivity as stainless steel - so you might as well use stainless steel shims. So why don't they?

The only reason I can think would be its lower weight, but how much this would save I don't know.

 

[Fen]

I think it's more to do with reducing the weight of the purchaser's wallet isn't it? You could make those plates from lead and they'd weight what - 500g the set? They are after all wafer thin. Titanium, stainless, tin plate or solidified helium is going to make the square root of sod-all difference to the weight.

As for what they do I tend to think that while you don't want the fluid to be heated too much you DO want the calliper to act as a heat-sink to cool the pads, so you want to transfer the heat away from the pad into the calliper where the surface area to lose the temperature through heat exchange with/radiation to cool air is much, much, much, much larger.