I have a firewall mounted brake pedal setup that the po mounted up kinda high. It actually works out ok with the firewall and engine placement but the pedal is to high off the floor. I understand about maintaining the correct pedal ratio. I need to add about 3" to the length of the pedal and will need to lower the master cylinder pivot point to maintain the same ratio. Since the mc pivot is going to be lower, then the actuating rod is going to be on an angle instead of straight into the mc. Is there any issue with creating an offset mc rod to keep it straight and level? Sorta like a Z? To eliminate any flex I was thinking of using a short piece of flat bar with a hole drilled in the lower corner that would attach to the brake pedal. Then weld a long coupling nut to the top edge for the mc rod to thread into.
You can just extend the pedal just be aware that the brakes will get more sensitive as in you won’t have to push as hard with a greater pedal ratio than you have now. What is the current ratio and is it power or manual? Sent from my iPhone using H.A.M.B.
It has power brakes. Current setup is right at 5:1 and it looks like it would move to 6:1 or a little more. Appears to be a factory pedal assembly from a later model car/truck.
I would be tempted to extend the pedal and try it, before re-engineering the whole setup Sent from my iPhone using H.A.M.B.
In the whole scheme of things, the only part I would be re-engineering would be the mc push rod. I guess I should take it apart and try to mock it up before I do any building. I found where its allowed to be up to 5 degrees inclined. I am spit-balling that it will be more than that.
I had the same problem in my 39 Buick Extended the pedal quite a bit. You could not tell anything was different when braking. I agree with 57 Fargo
I lengthened my brake pedal arm 3 " on my avatar . It's a power set up from a OT 77 Chevy Caprice. Works fine. Bill
I have extended the pedals in a car I built years ago, and it worked just fine. You would get into trouble with a very hard pedal if you shortened the the pedal arm. Go for it, if too sensitive you can re engineer it, but try it first just with the added length. Why make more work for yourself if not needed?
Thanks for the information. I will just lengthen it first and adjust as needed if it doesn’t feel right. I was thinking of cutting it on a long angle and fitting the extra piece in, but your way looks good to.