So, first off, I am a new member, yay! Im a forum addict, went from car forum to car forum. Now that I have started to work on my 8 year old project, some problems have come up. I own a 68fj40, sbc327, and a list of other mods. I recently installed a 79-85 minitruck booster with a 90 4runner MC. I believe its a 15/16 bore. Brand new lines to the front disk calipers (70's fj40 calipers). Brand new lines to the rear (monte carlo gm calipers.) And I have also installed an ssbc proportioning valve. I did however, not notice any residual valve on this 90 MC, Im not going through a dist block, just one line for the rear, and one for the front, coming out of the MC. So I bled, bled and bled. With the back brakes cut off (with valve), I get drag on the back (small amount). The pedal feels rock hard, and front brakes work good. When I slowly open the valve to allow more pressure, At a certain point, it goes from a rock hard pedal, to a spongy soft to the floor pedal. Now the rear brakes work, OK, but the pedal goes to the floor. The way I have the brake pedal setup, is, the MC bottoms out on rod travel before the pedal does. PLENTY of travel. I just pulled the ssbc, and am wondering if its faulty, or im missing something. I'm ready to drive my rig, and this is holding me back. Thanks for any help!!!
Last edited:
