Stopping Power! 996tt 6 Pot Caliper Upgrade

[EvoSlayer]

I recently realised that the 996tt was due a brake fluid change and thought while I was at it I would change the flexible lines for some stainless steel items...simple enough. However, after receiving a message from Steve (996ttStevo) and listening to peoples opinions on here I decided to go the full Mugabe and ditch the 4 pots for something with a bit more grab! I have now managed to gather together all the bits and pieces and plan to do the install next month (‘bit busy at mo). I’ll try to get a few pics as I go and post the DIY on here but for now here’s something to get you started!

Porsche 996tt 6 Piston Caliper Upgrade

Parts you will need:

996 GT3 MkII 2004> 6 Piston Caliper (left)...................................996 351 431 90
996 GT3 MkII 2004> 6 Piston Caliper (right).................................996 351 432 90
997 tt Brake Disc (left)............................................................997 351 405 00
997 tt Brake Disc (right)..........................................................997 351 406 00
4 X Caliper Bolts (8mm longer for 6 pots).....................................999 067 053 09
2 X Pad Wear Sensors.............................................................996 612 347 00
12 X Pad Damping Plates (6 per side).........................................996 352 086 02
Brake Pad Set........................................................................996 351 948 00
(I’m using standard 996 GT3 pads for the 6 pot/steel disc setup)
Brake Fluid – Motul RBF600 (suitable for most applications and cheaper than Castrol SRF)

Optional:
New Expanding Springs - for securing pads
(It appears these are only available as part of a mounting kit which also includes new caliper pins which come already fitted to the new calipers)
Goodridge Stainless Steel Flexi Brake Lines........................................SPR0801-4C
New Fixed Brake Lines - connecting flexi’s to caliper
(Details on lengths to follow when I get it all stripped down)



Slaps on the back for Steve (996ttStevo) for sourcing and arranging delivery of the ‘big reds’, help & advice, and generally putting up with my wittering (thanks mate) and Gavin @ OPC Sheffield Parts Dept for supplying the rest of the bits without breaking the bank! Cheers.

Have fun & stay safe

Edited by EvoSlayer on Friday 3rd April 16:45

Edited by EvoSlayer on Monday 6th April 11:17

[996TT_STEVO]

Wow... you have been shopping.

This will be a great improvement over stock.

Glad you like the 6 pots Andy... That's Porsche Porn!

[PHOENIXUK]

Thought you were contemplating a GT2 Andy, they come free when you buy one..
The way the prices are you could probably have bought one for what you must have spent on that lot.

[EvoSlayer]

PHOENIXUK said:

Thought you were contemplating a GT2 Andy, they come free when you buy one of them.

I hear you need to be a real man to drive a GT2 quickly!

[PHOENIXUK]

EvoSlayer said:

PHOENIXUK said:

Thought you were contemplating a GT2 Andy, they come free when you buy one of them.

I hear you need to be a real man to drive a GT2 quickly!

And I'm still looking for one honey..

[PolarExpress]

Should have gone for Alcons instead of OEM discs. Cheaper and longer lasting.

[dom9]

Looking good - They must have set you back a fair whack, but i bet the stopping power will be oh so worth it!

Let us know how the conversion goes and how much of an improvement you think it is.

I had a look at big brake kits for my Carrera but I am now just having the calipers rebuilt and powder coated, the fluid changed and steel brake hoses added... Will then try and shed some weight with carbon panels, seats etc to get the improvement!

[jjcodex]

Great Thread

Next - photos of them being fitted/ as fitted and confirming any issues that you had, please! (Will help me eventually drum up the confidence to do this)

Cheers

JJ

[EvoSlayer]

dom9 said:

Looking good - They must have set you back a fair whack, but i bet the stopping power will be oh so worth it!

Not bad considering for replacement front discs & pads for a 996GT3 with 6 pots (non ceramic) and a fluid change OPC want £1377.00
Admittedly I paid about 300quid more than that but I got 2 6pot calipers and all the other bits and pieces too!

[EvoSlayer]

Callughan said:

Good Stuff, would PSM have to be reprogrammed due to improved braking? Did you try Cermaics before you choose this braking system.

Not heard of PSM being an issue before & to be honest I didn't even consider ceramics as an option as the rears will remain standard steel and I don't even know if you can mix'n'match front/rears. I certainly wasn't prepared to shell out for ceramic discs/pads for all 4 corners plus front calipers! that would have been outrageous.

[DiscoColin]

PolarExpress said:

Should have gone for Alcons instead of OEM discs. Cheaper and longer lasting.

I think that needs a caveat - cheaper in the long run due to longevity (especially if you are going to spend time on track) but as a bare item... No.

[FWIW - I have them too and they are great, but if I only ever did road miles the justification would have been tough]

[996TT_STEVO]

PolarExpress said:

Should have gone for Alcons instead of OEM discs. Cheaper and longer lasting.

Great Disc... but not worth the extra just for road use IMHO

[ZeroH]

Great thread Evoslayer, thanks for posting all the bits... v useful indeed... keep us posted on the install !!

[VonSenger]

996TT_STEVO said:

PolarExpress said:

Should have gone for Alcons instead of OEM discs. Cheaper and longer lasting.

Great Disc... but not worth the extra just for road use IMHO

Look fecking great though. well done

[Stevorocket]

I second the use of Alcons - why? you are supposed to be going for better braking!! - most miles done by a track car are on the road getting there - the on track performance of these is superb but its the overall performance and longevity which is important in the cost/convenience equation.
Polar Express has done at least 30k miles on a set of Alcons - I have done 18k miles on mine on a GT3RS and they are no-where near replacement.
That includes UK track days and Nurburgring and European trips.
The extra cost of the Alcons will pay back by lasting longer than you keep the car!

Edited by Stevorocket on Wednesday 11th February 00:22

[shalco]

Does anyone have any used shot pads for these calipers??

996 351 948 00

I need some for templates for custom pads to be made to fit a pair of AP Disks.

[996TT_STEVO]

Hello can anyone hear me

The Alcon or Brembo discs are both superb (I have run the floating Brembo for years now)... but Andy wanted a road disc... for road use these will be more than adequate.

[christer]

996TT_STEVO said:

Hello can anyone hear me

The Alcon or Brembo discs are both superb (I have run the floating Brembo for years now)... but Andy wanted a road disc... for road use these will be more than adequate.

Apparently Alcons last longer in all applications, and the discs are cheaper then OEM apparently.....so yes we hear you, although we are not sure this is reciprocated

[Callughan]

EvoSlayer said:

Callughan said:

Good Stuff, would PSM have to be reprogrammed due to improved braking? Did you try Cermaics before you choose this braking system.

Not heard of PSM being an issue before & to be honest I didn't even consider ceramics as an option as the rears will remain standard steel and I don't even know if you can mix'n'match front/rears. I certainly wasn't prepared to shell out for ceramic discs/pads for all 4 corners plus front calipers! that would have been outrageous.

You can't mix them. I need to double check about the PSM I read somewhere ages ago that the parameteres need to be adjusted on Rennlist(I maybe wrong), ceramics do cost more, but depends on what your objective is and what you needs are. However the setup you are changing too will definately be a great improvement as other members have testified. Good Luck

[DiscoColin]

christer said:

Apparently Alcons last longer in all applications, and the discs are cheaper then OEM apparently....

Nope - they are pricey (over twice as expensive as OE IIRC from what I paid). However, all accounts of the few people who have ever worn out a set indicate that they last of the order of 10 times as long. So as I said earlier - cheaper in the long run, but there is an up front hit.

Just for normal road use with no repeated big stops the OE ones should be perfectly adequate. The big issue is that as few as 3-4 track days at circuits with long straights (Silverstone, Brands GP, etc...) can cause them to crack to an unacceptable degree around the vent holes necessitating replacement. Alcons have no such issue.