Front Brake Question

[kcorn]

I have a base kit on order and I am in the process of planning my build. I will use 2015 mustang IRS which comes with 13" disks. I want to have some balance between these and the front brakes. The two best value propositions I have identified are the sn95 cobra 2 piston calipers and 13" disks or a set of adapter brackets with the s197 2 piston calipers and 14" GT500 disks. This will be a street driven fair weather pleasure vehicle with the occasional spirited twisty drives. Only likely competition might me some gymkhanna events. I am leaning towards the cobra option and I would appreciate input from the real world driving experience of any members who have utilized either of these front brake alternatives in their build.

[CraigS]

I think you will be fine w/ the cobra brakes. I did a 2015 retrofit on my MkII. I have old Fox Mustang GT front brakes and the 2015 mustang brakes that came w/ the salvage yard parts. Even using the oem 2015 pads. I am surprised that this is working out quite well. I have a CNC dual MC setup w/ 3/4 front and 5/8 rear MCs. The front to rear balance is fine and the balance adjuster is pretty close to centered which means that the basic combination is a good one. I have some of the parts to upgrade to the sn95 fronts but it will be a few more months before that happens.

[skullandbones]

Hi kcorn,
I have the sn95 spindle and 2000 PBR 2 pot setup. It's been ok but not optimal for tracking or any real high performance situations in my opinion. However, I must qualify that I have not optimized the system with the best version of pads and SS lines, etc. I acquired the cobra r setup just recently from a friend. I would still consider it an upgrade vs the pbrs due to the added rotor size (larger moment arm). I think the calipers are very close in performance. It does have "cobra" on the showy side so that's cool. Also, I have the SS lines. There should be some observable improvement. If I see a ~15 % improvement, that would be OK. It's always good to have the best brake setup you can manage. You never know when that extra ten foot stopping power will be needed. I've had a couple of close calls myself:eek::eek::eek::eek:.

Good luck,

WEK

[scottiec]

kcorn, also keep in mind the full capabilities of your brakes will only be optimized with the correct tires. In other words, yes bigger brakes will slow the wheel down faster, but the level of adhesion your tire has does not change. Correct me if I am wrong, but I believe the challenge cars run sn95 single piston brakes. You would be amazed at what a set of quality pads can do.

Keep in mind, I know nothing about the 2015 IRS brakes. Just make sure you have good balance from front to rear. I know CraigS likes his CNC dual master set up