Jerry Hey wrote:

 > >>Dean Head wrote:

 >>>
 >>>  Paul,
 >>>  I am finding the Barry mount discussion most helpful to
visualize how it
 >>>  comes together. Looking at your annotated Barry/Cup drawing I
have a couple
 >>>  of questions. I attached an edited copy marked up. Is the member that
 >>>  receives the bolt a length of tube closed at one end with a 4130 disk?
 >>
 >>Yes.
 >>
 >>>   If
 >>>  so, the walls look quite thick. How thick?
 >>
 >>At least 3/16" thick. If you plan to machine it on a lathe by
 >>boring  bar stock it make it 1/4 inch thick.
 >>Adds a tiny bit of weight but it is a high stress area.
 >>
 >>
 >>Paul Lamar

 Paul,  .188 is very thick, indeed.  You need an i.d. of a little more
 than an inch to clear the .750" socket (mine is 1" o.d.).  To get
 this with .188 wall would require 1.5" dia. tubing.     I went much
 lighter in my installation, 1.25 X .049 wall.  To this is welded
 three .750 x 049 tubes with substantial fillet welds.     The fillets
 beef it up considerably.    The resulting cluster is quite massive.
 The top washer is .125 thick.   I purchased it  from the Barry
 distributor.
 I'm not arguing.  Just surprised.

    Jerry

Just the washer welded to the tube and not the tube. Also only on
the bushing-in-the-firewall type mounts.

BTW How thick is your bottom washer? Should be .125. PL

It is .125.   BTW, I was able to "save" the first engine mount.   In
the process we fine tuned the motor mount fixture to remove  the side
to side error.  It is good to go.    Jerry

 
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