Master cylinder conversion

[scooder]

Originally Posted by Heard

Tom,
I recently went through this. The only 1 1/16" mc I found was from Wilwood. Unfortunately, it just didn't move enough fluid to work correctly and I ended up using a 1 1/8" one from Summit.

When I say 'correctly', I spent a lot of time studying how a mc works and what is SUPPOSED to happen if one circuit fails. So, while the 1 1/6" mc worked OK under normal circumstances, it would NOT work in the event of a failure of either front or rear brakes. There was just not enough pedal travel in my '36.

IMO, I think the 1 1/8" one works great. The pedal effort/travel is fine for me.

But Mart is correct. Plumbing is a nightmare all to itself. I spent a lot of time on the Net and at the local parts houses trying to get all the fittings I needed. It was not fun.

Heard

I fully understand what your saying here.
I fitted a 1" dual master on my truck, this being the mustang size that's ment to be the ticket. Pedal travel was to much for my liking. When fiddling with it I cracked open the union to the rear brakes to see what would happen in a leak on one circuit situation, well the pedal went almost to the floor! Not good, has any one else tried this? It appeared to me that as I thought, that mustang one is to Small. And if they all travel this far some cars are basically gonna be left with no brakes when one circuit leaks. I say some as a lot of hotrods don't have the same amount of travel available on the pedal.
What's on mine now? A stock Ford single master, bolts in easy, plumbs easy, bleeds easy, looks right has the correct size bore, pedal travel is like I like them, about 1 1/2". If it fails, the hand brake (e brake) is spot on and works great. Better than rely on some thing that won't actually work when you most need it.
Martin.