Pad knockback

semtex · 09-26-2009, 07:26 PM

Well, when I posted this question originally (over 3 months ago), what I was referring to is that sometimes it feels like there's a little more travel in the brake pedal before the brake pads bite. So I guess you could call that delayed braking time, sorta. If I release the brakes then step down again, then it bites with barely any pedal travel at all. See what happens is that when there's a lot of lateral load (as during hard cornering), the wheel hubs can flex a bit, which makes the rotors push or knock the pads back into the calipers (hence the phrase 'pad knockback'). The result is a small gap between the pads and the rotors, which in turn accounts for why you have to push the brake pedal down deeper before the pads bite into the rotors. If you go up to my original post and click on the link, it'll take you to StopTech's page explaining it all, complete with a little graphic to illustrate. I've gotten into the habit of double-tapping my brakes now, which means then when I want the brakes to really bite hard, I don't just step down on the pedal, but do a quick step-release-step on the pedal.

09-26-2009, 07:26 PM	#9 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	Well, when I posted this question originally (over 3 months ago), what I was referring to is that sometimes it feels like there's a little more travel in the brake pedal before the brake pads bite. So I guess you could call that delayed braking time, sorta. If I release the brakes then step down again, then it bites with barely any pedal travel at all. See what happens is that when there's a lot of lateral load (as during hard cornering), the wheel hubs can flex a bit, which makes the rotors push or knock the pads back into the calipers (hence the phrase 'pad knockback'). The result is a small gap between the pads and the rotors, which in turn accounts for why you have to push the brake pedal down deeper before the pads bite into the rotors. If you go up to my original post and click on the link, it'll take you to StopTech's page explaining it all, complete with a little graphic to illustrate. I've gotten into the habit of double-tapping my brakes now, which means then when I want the brakes to really bite hard, I don't just step down on the pedal, but do a quick step-release-step on the pedal. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.