Hi, ive uprated my back brakes on my s1 to 273mm cossie discs, during a 3 year rebuild. I had greenstuff front pads and drilled and grooved discs on the front, i thought they would work well but found out the hard way!
Now the cars been fixed ive got a set of 2wd cossie 4 pot calipers on the way for the front, can any one tell me what set up would be the best, bias valve?? What discs?? any advice would be great cheeRS

 

Green stuff are crap IMO, try REDSTUFF CERAMIC, awsome power from these and from cold to cooking, only faded my cossie brakes once with these(2wd)
tabetha

 

Your rear discs are bigger than the fronts? You must be mad.

Your fronts do 90% of the work, yet your rears are more powerful. Putting bigger discs on the front will increase weight transfer so could make it worse still. Get a bias valve and work out the plumbing as you have diaganol spilt brake lines.

Nothing wrong with greenstuffs either.