S197 2011 mustang Build Thread Profile - S197 Mustangs

[captdistraction]

Head work in progress. We meaured the gen2 ported heads to have massive ports, and were able to clean up the one cam cap that was slightly loose in clearance. Both sets of heads getting new guides and valves/valvesprings. Will use oem keepers and oem seals, but the rest is ferrea and then PAC for springs.

 

[Alex_murrica]

@captdistraction You mentioned anti knock-back springs for the s550 Brembo calipers. Can you share some more info; dimensions, spring weight, and where you had them made? Thanks.

 

[captdistraction]

Anti knock-back spring for 26-36mm pistons 4.0 lbs of force (42.200.1007), 12X total needed

 

[Alex_murrica]

Anti knock-back spring for 26-36mm pistons 4.0 lbs of force (42.200.1007), 12X total needed

Much appreciated!

 

[captdistraction]

No worries, they did make a difference. They didn't totally take away knockback especially on stickier tires like S8M or A7, but mitigated it enough that I had meaningful brake on first press (I still doubled this setup) but didn't have significant drag. There's no free lunch, but 4lbs seemed to be the best of both.

 

[steveespo]

Much appreciated!

Alex I have a brand new set in packages. $35 shipped

 

[Alex_murrica]

No worries, they did make a difference. They didn't totally take away knockback especially on stickier tires like S8M or A7, but mitigated it enough that I had meaningful brake on first press (I still doubled this setup) but didn't have significant drag. There's no free lunch, but 4lbs seemed to be the best of both.

That's all I'm looking for; I just want to know I'll have a pedal to push on after a long straight. These calipers work well but they don't inspire confidence.

 

[Alex_murrica]

Alex I have a brand new set in packages. $35 shipped

Done deal, PM me how I can pay you.

 

[steveespo]

Done deal, PM me how I can pay you.

Let me dig them out of storage tomorrow and I will PM you. Thanks Steve

 

[captdistraction]

Take it to PMs , let this thread stay buried next to its subject in peace

 

[Adam Ginsberg]

Take it to PMs , let this thread stay buried next to its subject in peace

No, the Beast needs to awaken from it's slumber, get out and race again!!

 

[Dave_W]

I just want to know I'll have a pedal to push on after a long straight.

An option is to use your left foot for a "confidence tap" or two on the brake pedal before you get to the braking zone. Even with the anti-knockback springs, it lets you know they're working, or take the slack out of the pedal if they aren't. You can try doing it on the street to build a habit.