rallydallas
Active member
- Joined
- Jul 11, 2005
- Location
- Dallas, TX
Pillow, FWIW, this weekend I replaced my stock 740 (3/4" bore) master cylinder with a Tilton Series-75 (7/8" bore.) I used a 3d-printed clevis, and used M6 bolts to mount it. Wasn't easy for sure since there's so little space under the dash for fiddling with the MC. Anyways, I'm not 100% certain but I think 7/8" bore might be over-shooting. With 3/4" I was getting gear teeth almost all the time during shifts. Now with the 7/8" I get *no* teeth at all, but the clutch engagement is really high up on the pedal, definitely in the first 25% of pedal travel. A 36" AN-4 stainless line (McLeod 139204-36) is long enough on mine to go from MC to the slave. I may try adjusting the pushrod a bit to see if I can change the engagement point on the pedal.
Also on mine I managed to alter my Fuel pump circuit in the fusepanel to be 12V-switched-on (from the GM ECU) as opposed to my factory ground-switched-on (from the Volvo ECU.) I basically cut a wire and re-routed it at the fuel system relay. Pretty easy. Oh and I made a shunt at the shifter box for the park/neutral switch to bypass (since the auto shifter was removed.) You could probably just cut that connector off and solder the two together.
For mine I added a little fusepanel that handles the power for each injector bank, GM ECU ignition power, and "engine sensors / O2 / MAF / reverse solenoid" with two separate relays driving these; haven't had any issues yet.
Also on mine I managed to alter my Fuel pump circuit in the fusepanel to be 12V-switched-on (from the GM ECU) as opposed to my factory ground-switched-on (from the Volvo ECU.) I basically cut a wire and re-routed it at the fuel system relay. Pretty easy. Oh and I made a shunt at the shifter box for the park/neutral switch to bypass (since the auto shifter was removed.) You could probably just cut that connector off and solder the two together.
For mine I added a little fusepanel that handles the power for each injector bank, GM ECU ignition power, and "engine sensors / O2 / MAF / reverse solenoid" with two separate relays driving these; haven't had any issues yet.