Braineack

iTrader: (62)

Ran an autox this weekend and kept adding more and more rear brake till eventually I maxed out the valve. Anyone else out there have a similar experience? I'm running HP+ F&R currently.

Savington

iTrader: (31)

I am close to maxed out, but not completely there. Going to gain some more range when I go from Xp10s to 12s in the rear.

Braineack

iTrader: (62)

I mean maybe I should throw the xp10s in there now and try that at the next autox? I have a set of F&R xp10s.

Savington

iTrader: (31)

You'll like that much better in general. Remember to get new rotors.

curly

iTrader: (25)

I'm near the max with 1.8's and porterfield rs4 race pads F&R

Oscar

iTrader: (2)

1.5 turns from full rear bias. xp8 all around and corrado fronts. More rear bias and the car gets squirelly under heavy braking on track

M-Tuned

iTrader: (6)

We hope to be releasing our Rear kit on Saturday. It will help you solve this problem.

It uses the large Rear Sport Rotors, with 1.8 Caliper brackets.

y8s

iTrader: (8)

run R-comps to shift the bias forward and the time to zero.

Braineack

iTrader: (62)

You want to buy them for me?

y8s

iTrader: (8)

you can probably find a set jewsed for 100 bux

Doppelgänger

iTrader: (12)

Are the people who are having a problem with the bias the ones who have 1.6 brakes with the fronts upgraded or is it the 1.8 people too? I'm wondering because i'm about to upgrade my fronts and my car came with the sport brakes. (thread with new brakes will be up soon..and you guys are going to kill me)

Braineack

iTrader: (62)

I have a 1.6L with Corrado front rotors and 1.8L rears and the wilwood valve.

Doppelgänger

iTrader: (12)

Are the 1.6 and 1.8 calipers the same front and rear? I'm just wondering why there would be any bias issues if you're running 1.8 caliper/rotor in the rear and the 1.8 caliper and 11" Corrado rotor in the front. I mean, you're not increasing camping force over the standard 1.8 front rotor, increasing the rotor size just makes for better heat dissipation.

Braineack

iTrader: (62)

There's more surface area per rotation, the stopping force is night and day. Pedal feels like a VW or BMW, where the car stop before your foot even touches the pedal.

and correct calipers are the same.

I posted this a while back:

Doppelgänger

iTrader: (12)

So if the pad is putting the same surface area down on the rotor face, but the rotor is larger...what's happening? I understand that there is more friction surface area (larger rotor) and that it's moved out further from the center of the hub, but I can't figure out much past that (I have a couple ideas but would like to read rather read than type).

Braineack

iTrader: (62)

all I know is there's more surface per rotation...everything else is over my head.

gospeed81

iTrader: (51)

You are applying the force further out from the center of the disc...creating more torque to stop the car with.

Doppelgänger

iTrader: (12)

lulz. I mean, I can understand the speed of the rotor traveling past the pad will be greater which makes for more drag between the surfaces, but that's the only thing I can really make sense of. Seems too simple to me... but... i dunno.

M-Tuned

iTrader: (6)

Too Simple to be true.. But it is

hustler

iTrader: (6)

nothing aside from more heat capacity. You need a larger pad or more friction coefficient.