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      02-10-2010, 12:09 PM   #274
AP Racing - Chris_B
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Drives: E34 540i/6, others
Join Date: Jan 2009
Location: SoCal

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Quote:
Originally Posted by RickyBobby View Post
Curious what features are in the AP calipers for knockback. Ironically, I ran your AP knockback springs in my stoptech's. They helped, but did not completely eliminate the horrible knockback from the weak nissan hubs. Nothing like coming out of the corkscrew and having your pedal go the floor at the next brake zone.
Oh yeah, turn 9 can pucker the seat cushion if you get a strong run out of 8A and the first half of pedal is surprisingly absent! There is some runoff, but it quickly runs out since the exit is off camber. Not that I have ever had an issue there....

I can't go into all the details, but many years of seal and groove machining variations have essentially eliminated knockback. We often hear that complaint on the ST kits (especially from the Subaru WRX crowd -- much worse than the Nissans), which has *thus far* been cured 100% of the time after moving up to AP.

Chris