Quote:
Originally Posted by Z3SpdDmn
I'm currently putting 335i calipers on my 128i. I wouldn't do it until I confirmed that I wasn't altering the OE brake bias. I know all too well about the negative effects to ABS function and performance that are brought about by altering bias. Driving additional forward brake bias will also increase understeer on corner entry through the trail-braking phase, for those of you who are driving on tack. Upgrade wisely.
For those who need credentials: 5+ years engineer in OEM vehicle performance development, 4+ years as and professional development and race driver.
128i vs 128i Performance vs 335i Brake Bias Calculations |
BMW seems to think the 6 piston 135i calipers/rotors with the 328i rear 42mm calipers is fine and with a stock master cylinder.
The DSC needs to be coded with a VO containing +SPBR for the system to work correctly again. It changes a few coefficients. Somehow it also changed my pedal feel.
The 135i fronts are 2437 mm^2 (338x26 rotor) area and the F30 fronts are 2513 mm^2 (340x30 rotor). I chose the F30 calipers because the 135i's crack and the rotor is more massive.
135i/335i/328i master cylinder isn't a bad idea. Mine's in the mail.