This is the last issue I need to resolve on my 67. The brakes. Manual, all disc. Was power, but i hated the booster/MC and could not get the booster and MC to function as a system.
Everything is brand new, including hoses.
Front is standard 11" rotors, KH 4 piston calipers, etc.
Rear is SSBC system.
Master cylinder is new, got at local mustang shop, same one that comes with SSBC kits, except it is 1 1/8" bore. Smaller bowl for rears.
Pedal is manual brake pedal.
MC rod to pedal is adjusted.
No brake line loops above the MC level.
Bench bled MC more than once. Tap with mallet, bleed again, etc.
Bled brakes multiple times. Vacuum bled as well.
Rear brakes bypass the stock distribution block. Capped off the rear brake ports in the block. Don't have a brake warning light in car, so capped off that sensor port. Front brakes do go through distribution block.
Proportioning valve installed for rear brakes.
After installing MC, capped off the ports and tested pedal. Pedal barely moved then held rock steady, even after 60 seconds held down.
Went over all the flex/rubber lines (not braided) with pedal held down. No bulging or such.
No leaks after going over entire system. Also had someone else go over system to check for leaks.
Yes, calipers on correct sides. I checked, someone else checked. Unless I was a few beverages deep. Pics below. Of brakes, not beverages.
The issue: Brake pedal is super soft, lots of travel, although doesn't quite bottom out. 4-5" of travel and never really firms up. Barely stops the car, have to really lay on the pedal to slow it down. Full panic stop doesn't lock anything up and my leg hurts with the effort. Pedal doesn't pump up either. No matter how quickly or fast I pump the pedal, it's the same. This is similar to the issue I had with the booster installed, except that would pump up a little. And stopped better, but not much.
Other than getting a pressure gauge to check pressure at 4 corners, any other suggestions on where to start now? I have read dozens of threads on the topic and am still at a loss.
My 65 has the granada fronts, rear drums, and works great. Cobra roadster has SN95 style manual brakes, rock solid. I know how the pedal feels in those cars and this one isn't even close to the same feel.
This is the MC. This is with the caps/plugs in place to check the MC. Pedal was rock hard, no travel.
Front passenger brake caliper during installation.
Front driver side caliper.
I am thinking that there is something in the front brake circuit that is causing an issue. Why? I have replaced the rear disc brakes twice. No change. Could be distribution block? One of the front calipers? Or both calipers? I just don't know what would cause such excessive pedal travel. Feels like to psi is getting to the calipers. Need to find a pressure gauge/setup, perhaps locally!
Perhaps clamping (very softly) the four flex lines and testing pedal as suggested in the tech section of SSBC website.
Everything is brand new, including hoses.
Front is standard 11" rotors, KH 4 piston calipers, etc.
Rear is SSBC system.
Master cylinder is new, got at local mustang shop, same one that comes with SSBC kits, except it is 1 1/8" bore. Smaller bowl for rears.
Pedal is manual brake pedal.
MC rod to pedal is adjusted.
No brake line loops above the MC level.
Bench bled MC more than once. Tap with mallet, bleed again, etc.
Bled brakes multiple times. Vacuum bled as well.
Rear brakes bypass the stock distribution block. Capped off the rear brake ports in the block. Don't have a brake warning light in car, so capped off that sensor port. Front brakes do go through distribution block.
Proportioning valve installed for rear brakes.
After installing MC, capped off the ports and tested pedal. Pedal barely moved then held rock steady, even after 60 seconds held down.
Went over all the flex/rubber lines (not braided) with pedal held down. No bulging or such.
No leaks after going over entire system. Also had someone else go over system to check for leaks.
Yes, calipers on correct sides. I checked, someone else checked. Unless I was a few beverages deep. Pics below. Of brakes, not beverages.
The issue: Brake pedal is super soft, lots of travel, although doesn't quite bottom out. 4-5" of travel and never really firms up. Barely stops the car, have to really lay on the pedal to slow it down. Full panic stop doesn't lock anything up and my leg hurts with the effort. Pedal doesn't pump up either. No matter how quickly or fast I pump the pedal, it's the same. This is similar to the issue I had with the booster installed, except that would pump up a little. And stopped better, but not much.
Other than getting a pressure gauge to check pressure at 4 corners, any other suggestions on where to start now? I have read dozens of threads on the topic and am still at a loss.
My 65 has the granada fronts, rear drums, and works great. Cobra roadster has SN95 style manual brakes, rock solid. I know how the pedal feels in those cars and this one isn't even close to the same feel.
This is the MC. This is with the caps/plugs in place to check the MC. Pedal was rock hard, no travel.
Front passenger brake caliper during installation.
Front driver side caliper.
I am thinking that there is something in the front brake circuit that is causing an issue. Why? I have replaced the rear disc brakes twice. No change. Could be distribution block? One of the front calipers? Or both calipers? I just don't know what would cause such excessive pedal travel. Feels like to psi is getting to the calipers. Need to find a pressure gauge/setup, perhaps locally!
Perhaps clamping (very softly) the four flex lines and testing pedal as suggested in the tech section of SSBC website.