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The size, as i just said, was something i did wonder about... If the pedal would go all the way to the floor before anything happened, but this is not the case and i've been told by several customers how impressed with the setup they are.
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Fair play...
But, the issue of master cylinder suitability is a concern.
Not just for ECS kits mind...
Brembo sell the GT kit for all 5 stud VAG cars...Mk3 Golf GTI/VR6, Mk4 GTI etc, A3, S3 etc...
A Mk3 GTI has a master cylinder size of 22.2mm
A Mk4 GTI / A3 / S3 has a master cylinder size of 23.8.
Not a lot, 1.6mm...but in area, a fair proportion larger.
And people sell that kit for all cars...
Now the Leon Cupra R has a 23.8 MS, so they should be perfectly suited to all Mk4 platform cars...A3/S3/TT etc...
Not so the Mk3...you'll loose feel, gain pedal travel and loose modualtion.
A look at the Porsche PET system reveals that earlier 911s have different master cylinders to later - although sizes are harder to find (I failed)
Early (996) 911s have one size master cylinder...later 'facelift' cars, another...and GT3s, GT2s, Turbos and C4Ss a different one again to take account of the larger callipers all round.
I seem to remember the C4S MS is 25mm (although couldn't find proof)
The Cayenne is different again, presumably larger due to it's larger callipers and higher mass it's stopping.
What I'm getting at is that there is no way a calliper set designed for a 25mm MS will do a perfect job when being fed by a 22.2mm or 23.8mm MS...
ECS claim the 6 pot kit (Stage 5) is suitable for TTs, S3s, A3s and Mk3s...sorry, but I beg to differ.
Will they work...yes.
Will they be efficient and work to the best of their ability? No chance...
This theory is proven by my running S3/TT front callipers on my Mk3. Callipers designed for a 23.8mm MS fed by a 22.2mm MS...poor feel, more pedal travel etc...I shall be replacing them with the original GTI callipers (part numbers were different, although physically the same to look at!) as soon as I've re-furbished them!
Basically...what I'd like to know is:
If fitting Porsche callipers to a non-Porsche is running them on a smaller master cylinder...then you are selling yourself short of braking force - they could perform better.
...and if they perform less good than they could...are they any better than the properly matched Brembo GT kit?
...if not...why spend the extra for Porsche writing on the side of a Brembo kit?
...which brings us full circle, and straight back at the door of 'bling', does it not? /ubbthreads/images/graemlins/wink.gif
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I agree to the point made about them not working to their full potential, but there are otehr things to consider other than the caliper itself and force being exerted on the disc.
1) Swept area
2) disc size
The Cayenne pads are the size of a Brembo GT/ECS 2v2 caliper! they are massive! Swept area is a minimum of twice the size of the GT kit/2v2 kits. Now the discs are 358mm as opposed to 322(?)mm of the brembo. This again, will have a considerable effect on braking force. Now to me, the calipers would have to be seriously inefficient to only match the performance of the GT kit in my opinion. Fair enough the MC is smaller than it probably should be, but how much of an effect, in real terms, does it have? Ok the pedal will have to be pressed a bit further for the brakes to start working, but they will require less force to work as well as the OE setup.... of course pedal feel will be affected, but from what i have heard, not a great deal.