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S197 FTWMS #50 S197 NASA Super Touring Racecar Build Thread Profile - S197 Mustangs

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captdistraction

GrumpyRacer
1,954
1,698
Phoenix, Az
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.

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captdistraction

GrumpyRacer
1,954
1,698
Phoenix, Az
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.
 
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.
 

Dave_W

Cones - not just for ice cream
986
1,277
Exp. Type
Autocross
Exp. Level
20+ Years
Connecticut
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.
 

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