Liberty Rear Disk Brakes for A-Body

KosmicKuda said
The .100 thickness may be ok.
I'm actually more concerned about metal fatiguing by the addition of a machined pocket with the danger of introducing stress risers.
If I do this, I'm going to make sure to use a milling cutter with a radiused corner so there is a radius all the way around the bottom of the pocket.
It's one thing to use proven factory parts but when you start modifying them, all bets are off.

Totally agree.

The machining has to be done right for sure, if you have sharp edges on that pocket with that thickness of metal you're bound to get some cracks over time. The thickness of the bracket might be ok, but like you said, once you start modifying parts from the original design you're out on your own. Doesn't necessarily mean it won't work, but using proven parts doesn't guarantee success once you start cutting on them either.

jos51700 said
I agree and thought the same thing. Having only seen the parts in photos and not first hand, it appears that the area in question is already milled on a factory forging, and it looks thin as delivered.

Has anyone figured out how much metal is really being removed?

Yeah it would have been really nice if they took better pictures of by far the most critical modification they made. Or described how much metal was removed.

It's almost like Ehrenberger wanted to show off more than he actually wants someone to use the article as instructions to modify their own car. Or maybe he left if vague so when someone loses their rear brakes and sues he can say they did it wrong?