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.

 

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.

 

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.

 

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

 

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

 

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

 

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.

 

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

 

You want to buy them for me?

 

you can probably find a set jewsed for 100 bux

 

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)

 

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

 

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.

 

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:

 

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).

 

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

 

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

 

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.

 

Too Simple to be true.. But it is

 

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