Power Disc Brakes not working on hard stop?
It certainly isn't that I don't want to hear it - I'm open to any and all suggestions - I simply don't know where to go with it. I'm attaching 2 pictures, 1 is my 67 Dart with stock MOPAR system and the other is a 67 RT I just converted for a buddy. The Dart is 10+ years old and the RT is a brand new SSBC conversion ( kit A156-1 fits both B & A bodies). They both come with a manual proportioning valve that mounts between the stock prop valve and the rear brakes to be adjusted so the rear brakes won't lock up - this is a manual adjustment done once by trial and error until you get it right - they are adjusted correctly. The back wheels won't lockup on a hard stop and allow the system to apply greater pressure to the front brakes. I've checked the Booster to MC rod and both are adjusted correctly per the tool I purchased and listed previously. The Dart has stock rotors and calipers the RT has Drilled and slotted rotors and stock calipers (I believe SSBC uses a 67 Mustang setup - not totally sure). I have good travel on brake pedal and good operation under normal driving. They both hit a hard pedal with what feels like no further pressure on the brakes on a hard stop. This is same as described by "Mike69Cuda". I've emailed Cass at Dr Diff with this information and while he offered a single piston A body kit from 74-76 vintage he also stated he wasn't sure it would act as I wanted it to (a really candid and good guy - I trust his opinion). The folks at SSBC were not helpful at all and I would never purchase anything from them again. We've got 3 examples, my 2 cars and Mike69Cuda car, all of the same era with same characteristics. My system choices are limited by the small bolt pattern and 14 inch wheel which I'm not willing to change. This limits my rotor and caliper size options. You indicate your running the same system are your sure? Normally if you are working with one car and you have a problem its easy to go off in different directions and just start throwing parts and money at it but when you have 3 examples all acting in a similar fashion - - - ?
It certainly isn't that I don't want to hear it - I'm open to any and all suggestions - I simply don't know where to go with it. I'm attaching 2 pictures, 1 is my 67 Dart with stock MOPAR system and the other is a 67 RT I just converted for a buddy. The Dart is 10+ years old and the RT is a brand new SSBC conversion ( kit A156-1 fits both B & A bodies). They both come with a manual proportioning valve that mounts between the stock prop valve and the rear brakes to be adjusted so the rear brakes won't lock up - this is a manual adjustment done once by trial and error until you get it right - they are adjusted correctly. The back wheels won't lockup on a hard stop and allow the system to apply greater pressure to the front brakes. I've checked the Booster to MC rod and both are adjusted correctly per the tool I purchased and listed previously. The Dart has stock rotors and calipers the RT has Drilled and slotted rotors and stock calipers (I believe SSBC uses a 67 Mustang setup - not totally sure). I have good travel on brake pedal and good operation under normal driving. They both hit a hard pedal with what feels like no further pressure on the brakes on a hard stop. This is same as described by "Mike69Cuda". I've emailed Cass at Dr Diff with this information and while he offered a single piston A body kit from 74-76 vintage he also stated he wasn't sure it would act as I wanted it to (a really candid and good guy - I trust his opinion). The folks at SSBC were not helpful at all and I would never purchase anything from them again. We've got 3 examples, my 2 cars and Mike69Cuda car, all of the same era with same characteristics. My system choices are limited by the small bolt pattern and 14 inch wheel which I'm not willing to change. This limits my rotor and caliper size options. You indicate your running the same system are your sure? Normally if you are working with one car and you have a problem its easy to go off in different directions and just start throwing parts and money at it but when you have 3 examples all acting in a similar fashion - - - ?