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View Full Version : Too much brake bite!?


middy
05-22-2007, 02:31 PM
My car has Z32 TT calipers front and rear, blank rotors, SS lines front and rear, and brand new Axxis Ultimate brake pads all around, Z32 brake booster and Z32 MC. The brake pedal engages so stiff and high that my brake lights don't even come on before I come to a stop in normal everyday driving.

These calipers are off my wrecked TT, and I had used Axxis Ultimates previously on that car (no SS lines). It never felt like that. I know it's a ~700 lb difference, but I don't think that's what it is. I put the Z32 setup straight onto my 240 exactly as it came off my Z with the addition of SS lines, with the same used pads and all (these were different brand pads). The brakes felt great, they bit at the right time and pedal stiffness was good. Then I got new rotors and the Ultimates at the same time, and have too much bite. It has major front bias and I can lock up the front even on a mild emergency-oh-shit-the-light's-turning-red stop.

Anyone else had this experience? Maybe it's because of the added thickness of new pads AND new rotors? Or am I just going to have to switch to a different pad?

Addicted2Kouki
05-22-2007, 03:12 PM
check the size of the rotors.

kouki_s14
05-22-2007, 03:29 PM
adjust the brake master cylinder, unless you got the wrong size rotors

GSXRJJordan
05-22-2007, 03:39 PM
They're 30mm (TT) calipers, how could he have gotten the wrong size rotors?

I'd say just adjust the pedal play so your brake lights come on correctly, and be happy that you've got a nice brake setup. If you need more grip in the front, get some bigger tires ~

kouki_s14
05-22-2007, 03:45 PM
They're 30mm (TT) calipers, how could he have gotten the wrong size rotors?


never know, maybe he got R32 (32mm) rotors, shit happens

Jdotsturn
05-22-2007, 04:04 PM
use the z31 master cylinder instead, it should solve the front biased braking

mrmephistopheles
05-22-2007, 04:06 PM
Adjust the brake booster rod.

OptionZero
05-22-2007, 04:08 PM
^what he said

for instructions, check out a thread in the FAQ section, i believe it was also by mr.meph

middy
05-22-2007, 04:40 PM
They're 30mm (TT) calipers, how could he have gotten the wrong size rotors?

I'd say just adjust the pedal play so your brake lights come on correctly, and be happy that you've got a nice brake setup. If you need more grip in the front, get some bigger tires ~

I ordered the rotors directly from the StopTech marketing manager, so I'm pretty sure they're the right ones.

I have 235/45/17s EVO Yokohama A046 tires on 8.5" wide wheels, any wider than that is probably gonna require modifications I don't want to mess with! There is no clearance left and I don't want to do spacers. Guess I'll look into adjusting the pedal and the booster rod.

mrmephistopheles
05-22-2007, 05:02 PM
I don't think I covered it in that thread.
http://www.zilvia.net/f/showthread.php?t=22198

kouki_s14
05-22-2007, 05:11 PM
he was probably talking about this one

http://www.zilvia.net/f/attachment.php?attachmentid=2378&d=1057206267

http://www.zilvia.net/f/showthread.php?t=31732&highlight=spongy+pedal