Brake pads for biasing f/r on my SWB help needed

[ronw]

Ive got a 68 912 w/ a 2270 TIV and ive gone thru the suspension w/ poly bushings, 21/27 mm torsion bars, sway bars, and have just swapped in an 82 SC front end which got new bilteins/decambered ball joints and monoballs. ive put on new vented rotors and rebuilt the calipers. now instead of putting in a proportioning valve, i'd like to know what pad combo i could start w/ to properly bias braking w/ my set up w/ the new front end while staying w/ the 68 rear calipers?

thanks in advance

[ronw]

btw, intended application is street and occasional AX/DE. pagid yellow RS-19 (i think this replaces the orange RS-4-4) / pagid blue RS-4-2?

[Bill Verburg]

If you still have the solid rear rotors and L calipers, bias will not be changed by adding SC front brakes

[ronw]

thanks for responding bill

here is a pic of the rear. it says "G" on the side i believe but this is a stock 68 rear caliper. if the rear is either the L you mentioned or if in fact its a G, wont the SC front have a much improved clamping over stock, and bias the front?

[Bill Verburg]

Stock for a '86 912 was an "L", 2.25" mount 35mm pistons on 290x18 rotors 911 used 38mm pistons on 290x20mm rotors

Both 911 & 912 use 48 mm pistons, including SCs on 282.5mm rotors, 18mm thick on 912 and 20mm thick on 911


So since the rotor diameter and pistons haven't changed bias hasn't changed. The SC front rotors are thicker which gives you more thermal reserve. If you want more rear bias you can try to mount some early 911 38mm calipers but I don't know if they were available w/ 2.25" mounts or use pads w/ a higher Mu, If you use Pagid RS 19 yellow front then RS14 black in back will move bias to the back.