New Brake Discs - Options?

[jon luik]

Hi Guys

I have a 996TT with a few mods done by PSI, one being a brake conversion.

They are 355mm discs using the standard 4 pot callipers.

I've just been told they are a special GT3 brake conversion and need to be specially made - cost £900 !! With labour and VAT I am looking at £1200 !

Are there any other options you could suggest, Brembro etc. It may be cheaper to start again ? I already have some unused Pagid Green pads which I would like to use, hence I may need to stay with 4 pot callipers.

Thanks for any suggestions


>> Edited by jon luik on Wednesday 5th April 17:36

[rods]

I got my 350 discs from Gert at carnewal,far cheaper than UK prices.
Now running rattling Brembos,far superior to the standard discs,however not sure if these will work on 4 pots.

[supermono]

(shhhhhhhhhhh, quickly edit break for brake before anyone notices)

SM

[paulburrell]

Are the discs cross drilled or solid? Sounds to me like you have the standard Porsche Mk2 GT3 crossdrilled front discs. However, these usually come fitted with the 6 pot callipers. Standard Porsche discs at 355 mm will cost close to £1000 a pair from Porsche and will crack to buggery in no time at all if used on track. The alternative is the Alcon or Brembo floating disc settup that both use a hat and floating disc assembly. JZ Machtech sell them as do Parr. These initially cost c £1000 a pair(ex fitting) but when they need to be changed then you only change the disc and not the hat. Cost I believe is closer to £600. Not sure if these replacement systems will fit on a 996 turbo. Call Steve McHale at JZ and he'll advise you on suitability.



PS the original 996TT discs were the same size as the original Mk1 GT3 discs.

>> Edited by paulburrell on Wednesday 5th April 16:55

[jon luik]

paulburrell said:

Are the discs cross drilled or solid? Sounds to me like you have the standard Porsche Mk2 GT3 crossdrilled front discs. However, these usually come fitted with the 6 pot callipers. Standard Porsche discs at 355 mm will cost close to £1000 a pair from Porsche and will crack to buggery in no time at all if used on track. The alternative is the Alcon or Brembo floating disc settup that both use a hat and floating disc assembly. JZ Machtech sell them as do Parr. These initially cost c £1000 a pair(ex fitting) but when they need to be changed then you only change the disc and not the hat. Cost I believe is closer to £600. Not sure if these replacement systems will fit on a 996 turbo. Call Steve McHale at JZ and he'll advise you on suitability. Hi Paul Thanks for your info, the discs are crossdrilled and yes they are cracked to buggery ! PSI suggested there is a conversion to allow more cooling as it seems that the heat has caused the cracking. The discs themselves are not worn at all. >> Edited by paulburrell on Wednesday 5th April 16:55

[paulburrell]

You can get brake cooling kits, but I understand that that will not help overcome the cracking problem particularly if used on track. To get better disc life you need to change to a floating type arrangement without the cross drilling. Alternatively change the discs back to the standard turbo size Porsche items which cost about £400 a pair, but still crack when used on track.

[henry-f]

Floating discs with anti-glaze grooves rather than holes are indeed an excellent conversion they last forever, (well alright but a good long while - we use a single set for a 24 hour race). The 6 pot conversion shouldn`t be too hard if indeed you need it - and make sure you need it before shelling out the ackers, callipers from Porsche off the shelf ought to do the job. If you want a feet on the ground approach without any fluff and "talking the game up" give Steve Winter at Jaz (Wembley) a call. He runs our GT3 cup car and has oodles of years experience running cars in the Porsche Cup, Porsche Club & Open series as well as our Britcar endurance entry.

Henry

[jon luik]

Thanks Henry

I'll give Steve a ring as he serviced my car last time.