320i brakes in front and now..., The rears feel undersized Options

[banderson]

I did the standard conversion to 320i front calipers and removed the proportioning valve last summer and now I think that I may have increased the stopping distance. The rears don’t feel like they are working hard enough. I overhauled the system with new rotors, rear caliper rebuild kits, DOT SS lines and street pads.

Because my front brake pistons are bigger, it takes less effort to lock the front wheels than it did before. Now the front wheels lock well before the rears come close.

I havn’t heard of anyone complaining about this before and Grassroots motorsports reported that they needed an adjustable valve to keep there rears from locking. This makes me wonder if my rears are working properly. They get hot, so I know they are doing something. The pedal is solid and they don’t bind.

I am considering changing to a high performance street pad, or putting different ones on the back, but I don’t want them to grab too much.

Your thoughts?

[dcruiksh914]

If you move your old fronts to the back, you can always also add a 911 e brake set-up. I recently did a 5-bolt conversion with 911 brakes front and back. The 911 e-brake was a pretty easy add on. The only tricky part is getting a custom cable.

This might solve some of your problems.

BTW: where can we buy the adjustable proportioning valve? I want one but don't know where to find them.