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- - 63mm TB (http://zr1.net/forum/showthread.php?t=22441)

Lee,

Is this on the 90? I recall u had 63s on the 92.

Yes doing it on the 90 and the 91 project 368

Quote:

Originally Posted by Schrade (Post 198323)

Q's:

Is there a flow rating for stock?
How 'bout for 63mm?
And with 63mm, where's the bottleneck inflow THEN, with stock non-ported plenum / IH's?

a 427 at 7000 will pull 1" HG vacuum in the manifold with twin 63.5mm blades, and an oversize primary throttle plate. That'll cost a few hp. Smaller motors will be fine with 63mm. Not sure what vacuum a ported 350 would pull with the stock TB, maybe less than an inch?

Lee, you mentioned using a substitute for the DAG compound. What would that be?

Quote:

Originally Posted by LGAFF (Post 198348)

A dry moly lube

I'm intrigued! I'm quite familiar with molybdenum disulphide as well as tungsten disulphide dry lubricants (we coat bullets with the stuff to reduce fouling). Both will adhere well, tho some peening (or "sand blasting" process) may be necessary to get it applied.

However, unless there is some kind of bonding agent, pure moly or tungsten will be removed in the presence of oil...which is likely to be present (to clean moly OR tungsten from my rifle barrels a combination of penetrating oil among other chemicals makes short work of either).

So! I know you do you homework, and a dry lube like Moly makes a lot of sense, but I'm just curious what exactly is this moly stuff is mixed with that is being applied? Shrade's Parkerizing comes to mind as an agent that can be applied, that has some inherent dry lube abilities, and is impervious to (gun) oils.

Then again, I wonder if Jerry's Gaskets has any of the original DAG stuff?

The dry moly is commonly used for this application....all I can do is test it.

Quote:

Originally Posted by LGAFF (Post 198324)

2.501 is the bore and plates are 2.496 with a 10 degree backcut; these are custom

10 degrees on vertical axis.

It grades to 0' on the horizontal - a compound bevel, not exactly a simple cut.

And the 10' bevel on vertical implies that actual angle of the blades when 'closed', is 80'???

I think you meant open, not closed

I believe they mean the plate is cut to for a setting of 10 degrees from vertical when closed