Anyone running their big brake kits?

If so, what do you have and what do you think?

 

http://pbbrakes.com/

 

Looking at a front and back set for my Yeti.

The question is how does the overall piston CSA of the PB brake setups correlate to your current stock caliper piston setup and will the stock master cylinder be sufficient for them?  

 

Dave at VAGBremtechnik reckons that to work it out, you total up the toal CSA of 1 side of a performace multipot caliper (ie the outer pair of pistons on a set Brembo 4 pots) and compare them to the CSA of the stock caliper piston.  If its a smaller CSA then they are pointless, if it is greater than an 8% increase then you will lose the pedal feel and potentially the master cylinder wil be unable to cope and will also struggle to retract the pads from the disc.

 

This is some of the research done by some guys on the GTI forum when they were looking at what brakes from other high end VAGs will swap over and work well.  Octavia/Yeti use the same 312mm setup as the GTI iirc.  But you can see that for instance just because a company prodice a brake setup for a platform, it doesnt necessarily mean they will be great, for example the Forge setup above.  the Tarox kit also has issues with it as well.

 

 

 

piston area



1. stock front:


O2 RS/Golf/GTI - Ate FN3 54 mm: 2290 mm²

S3/R32/R - FNRG 57 mm: 2552 mm²



2. aftermarket - good match:


AP Racing 6-pot CP7068 (355x32 ) > 2350 mm² (special version of CP7040-caliper for Golf V/VI, Scirocco etc.)

AP Racing 6-pot CP5570: 27.0 + 31.8 + 38.1 > 573 mm² + 794 mm² + 1140 mm² = 2507 mm²

Audi TT-RS: 36 + 40 mm > 1018 mm² + 1257 mm² = 2275 mm²

Boxster: 40 mm + 36 mm > 1257 mm² + 1018 mm² = 2275 mm²

Boxster S: 40 mm + 36 mm > 1257 mm² + 1018 mm² = 2275 mm²

993 Turbo: 36 + 44 mm > 1018 mm² + + 1520 mm² = 2538 mm²

Brembo GT 'A-caliper': 40 mm + 36 mm > 1257 mm² + 1018 mm² = 2275 mm²

Stoptech ST-40: 38 mm + 34 mm > 908 mm² + 1134 mm² = 2043 mm²

Wilwood FNSL6R: 41.1 + 28.4 + 28.4 mm > 1330 + 636 + 636 mm² = 2602 mm²

Mov'it:
4s2 - 36 / 44 = 2538 mm²
4s3 - 36 / 44 = 2538 mm² (u.a. als VAG-Kit mit 322x32er Scheibe, geht unter 17")
4m6 - 36 / 44 = 2538 mm²
6m1 - 28 / 32 / 38 = 2554 mm²



3. aftermarket - mismatch:


Forge: 707 mm² + 1046 mm² + 1164 mm² = 2917 mm²

Mov'it:

4s4:  40 / 44 = 2777 mm²
4s5:  38 / 46 = 2796 mm²
6m3:  30 / 34 / 38 = 2749 mm²


Brembo 8-pot RS4/R8/Gallardo: 28 + 28 + 32 + 32 mm > 2840 mm²

Brembo 8-pot RS6 : 4192 mm²  (!!!)

996 Turbo: 40 + 44 mm >  1257 mm² + 1520 mm² = 2777 mm²

Q7/Touareg/Cayenne (there are 3):

34/36/38 mm : 907.920 + 1017.876 + 1134.115 = ~ 3060 mm²
32/36/38 mm : 804.248 + 1017.876 + 1134.115 = ~ 2956 mm²
30/34/38 mm : 706.858 + 907.920 + 1134.115 = ~ 2749 mm²



4. master cylinder:


- 22,22 mm >  388 mm² (some Golf V, some Scirocco etc.)

- 23,81 mm >  445 mm² (Golf V R32, Golf V GTI, Golf VI GTI, Golf R, Scirocco 2.0T + R)

- 25,40 mm >  507 mm² (RS3 + TT-RS)

 

I went through the piston sizes when I started a thread for the big brake upgrades. I think I bored a lot of people with the maths but the 6pot 330mm was a good match, a few percent over the standard set up

I would assume a set of DS3000 pads would be sufficient Richard as the Yeti brakes are very good as standard, see how you get on and then if required change the callipers.

 

 

 I have had a read of PB website, products look good, are these guys new to the brake market or what? From China? I haven't heard of them before.

Yes they are relatively new and operate direct from Taiwan I believe.

The products do look good and are well priced.

Here's the calculations I made Richard

I've done the working out for their 6pot 330mm front and 6pot 345mm

6pot 330mm

36 x 32 x 28 1017.36 + 803.84 + 615.44 = 2436.64 result is plus 6.4%

6pot 345mm

38 x 36 x 30 1133.54 + 1017.36 + 706.5 = 2857.4 result is plus 24% (bad match)

That really helpful guys, thanks!

No worries Richard

They also do coilovers too, but that's for another time

Its also worth looking at the monoblock construction, weight etc. Id also look into whether the pistons seals are internal or external. If external they will need servicing in time. Obviously the cheaper/nastier the seal the sooner it will need maintenance. Find out how much a maint pack is for the calipers.

Also look into the pad shape as well. If its a rare pad shape you might be limited on the pad market. If its a common pad shape you might have an abundance of pad options.

Internal oil and dust seals and a one year warranty apparently. Callipers are Ali, so shouldn't be too heavy.

They use the same pads as AP, so getting replacements or trying a few different choices shouldn't be an issue.

 

The 345mm was too big (as per Yeti thread) and rubbed the inner rim, but the 330mm 6 pot kit was spot on.

So looks like that's the winner.

 

Stock master cylinder should be able to cope, but I may look at an upgrade from a higher spec VW product.

Something like a toureg master cylinder?

Something like a toureg master cylinder?

 

Depends what Master cylinder is in the Yeti.  I rreckon chances are its not the 23.81mm one though.

 

 

 

4. master cylinder:

- 22,22 mm >  388 mm² (some Golf V, some Scirocco etc.)

- 23,81 mm >  445 mm² (Golf V R32, Golf V GTI, Golf VI GTI, Golf R, Scirocco 2.0T + R)

- 25,40 mm >  507 mm² (RS3 + TT-RS)

Edited 1 January, 201412 yr by vRSy

Internal oil and dust seals and a two year warranty apparently.

They use the same pads as AP, so getting replacements or trying a few different choices shouldn't be an issue.

 

Result.  

Depends what Master cylinder is in the Yeti.  I rreckon chances are its not the 23.81mm one though.

 

I suspect the 23.81mm is the one to upgrade to probably with the 330mm set up.

 

Think I'm going to go for all round PB big brakes and see how it goes.

 

 

 

I guess someone has to be guinea pig!

Nice one, what rear brakes are you going for?

They have put alot of effort into the site with caliper dims, piston dims, pad compatability, etc etc.  After having a good look through their website it looks very promising.

 

FI you were to look into this nfo say for a KSport brake kit, they withhold all the information and when yuo ask about piston sizes they get quite anti!!

Nice one, what rear brakes are you going for?

Looking at the smaller option Charlie.

304mm 4 pot rears to go with the 330mm 6 pot fronts.

The next option up is 330mm which I think is overkill on the back.

Nice, will be a great choice

Hello

I have a octavia 1,8tsi from 08 does any of you know What Master cylinder this car have because i Would like to Mount the stoptech st-40 330mm in front and maybe rs brake in the back, Will this work.

Thank you

Anyone running their big brake kits?

If so, what do you have and what do you think?

http://pbbrakes.com/

Looking at a front and back set for my Yeti.

pb brakes are the same as k-sport and many others (D2, etc)

same factory in taiwan, same generic brake designs

google art brakes

i have the details of factory if you want a pair branded 'bossfox'

-you'd need to order 10sets though

ok brakes for road and show