View Single Post
  #9   Report Post  
Posted to rec.crafts.metalworking
[email protected] etpm@whidbey.com is offline
external usenet poster
 
Posts: 2,163
Default Got the injector working

On Wed, 25 Jan 2017 10:49:11 -0500, Neon John wrote:

On Tue, 24 Jan 2017 17:52:35 -0800, wrote:


. The
existing injector orifice plate holes must be drilled at an angle
because that's how the jets of fluid come out. The holes are about
.008" diameter so I'm thinking about trying to drill them straight
with a .012" diameter drill. Maybe if the drill bit is held so that
only about .05" is unsupported it will be stiff enough to avoid being
deflected too much by the existing holes as they are opened up. Maybe
I need to see if I can remove the orifice plate and replace it with
one of my own. Perhaps a large hole can be machined in the existing
orifice plate and a new one added directly on top that has a hole
pattern better suited to applying lube in a straight line.
Eric


You have the wrong kind of injector. Sounds like a throttle body
injector. You need a conventional injector, the type that mounts on
each individual intake runner.

It will have one hole. The pintle injector usually has a little
pattern-shaping rod sticking out of the hole. The diaphragm injectors
as used by GM in the 80s and 90s (and probably longer) shoot a narrow
solid stream. This is the injector you want.

If you go to the parts store, ask for an injector for an early 90s
Chevy Caprice 9C1. This is the cop version of the caprice and
contains an iron block Corvette engine. Corvette injectors would also
work but the price would be higher.

Bladder reservoirs are available from McMaster-Carr. I suggest going
up in pressure. You might consider using hexane (McMaster) as the
dilutent. It will mostly have evaporated by the time the shot reaches
the target.

John
John DeArmond
http://www.neon-john.com
http://www.tnduction.com
Tellico Plains, Occupied TN
See website for email address

Thanks for the injector info John. When it is all working I won't be
using any type of diluent. The reason I am now is so I can practice
without losing any of the actual cutting tool lubricant because it is
so expensive. So I diluted some oil with some kerosene to mimic the
the viscosity of the real stuff.
Eric