Date:         Sun, 18 Oct 2009 19:55:58 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Late 1.9l vacuum system  was Ground Cleaning time...
Comments: To: Scott Daniel - Turbovans <scottdaniel@turbovans.com>
In-Reply-To:  <00be01ca5047$70f3b3c0$6401a8c0@PROSPERITY>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 07:05 PM 10/18/2009, Scott Daniel  - Turbovans wrote:
>if I need a calibrated orifice in a hose, I just fine a round piece
>of plastic that will fit in the hose and drill the right size hole in it.
>I'm sure if it's that easy you would have thought of it.

It's that easy, although you have to remember that the length of the
orifice affects flow rate, so you need to bore out the plug so the
orifice itself is fairly thin.   But when you get down to drilling a
hole that's only six thou in diameter, things get a little
interesting.  A Post-It note, for example, is about four thou
thick.  My smallest drill is a number 80, which is .0135 in
diameter.  That's why I suggested punching through foil for that
one.  It's a lot easier to come up with a .006 pin with a square end
than to find -- or make -- a drill that size.

Yrs,
d