Early S197 Booster/ Master cylinder upgrade?

[Torchvert]

I'm currently running the s550 performance pack 6 pot Brembos on my 2005. Right now the engine is currently out for a Coyote swap.

Wondering what the best strategy would be to upgrade the brake booster and/or master cylinder while everything is essily accessible. Currently have a 2013 Boss 302 cylinder and booster available if those would be an improvement?

 

[Mad Hatter]

That will work fine. Since the pedal travel is a longer you want to use a aggressive brake pad to make up for it. Am pretty sure the Boss brake booster is the same as the GT500 unit.

 

[stevbd]

My understanding is that the master cylinder is identical on all s197 models, and smaller than the s550 master cylinder used with the 6 piston s550 brakes. The brake booster is sized differently for the s197 Boss and GT500 models compared to the standard GT, creating a firmer pedal feel. But the longer pedal travel with the 6 piston s550 brakes in an s197 is just part of the deal absent a complicated rebuilding of the master cylinder.

 

[BackInBlack]

When I built my car and I was comparing parts to see what I needed to keep, swap or replace -- I found that the part number on Brembo equipped S197s is different than the one on non-Brembo equipped cars. When I asked about it, I was told that the brake booster on Brembo equipped Mustangs is weaker to adjust for the Brembo characteristics. This may have been a change that they did after 2012 though since I got this info from the current Ford catalogs. I checked the one on my donor car, and it appears that my donor boss got the base model brake booster from the factory. I thought about changing it out for the one that the catalog says I should have, but it seems to work and feel just fine. So I just kept it.