Don't recall the size, Steve

    I have one of those boxes of innumerable sizes from which I try several
until I get the fit I want.   The size you want depends on two things - the
dia of the injector where you want the "O" ring to go (since there are about
three places and therefore different dimension diameters of the injectors
that you can place an "O" ring) as well as how much clearance you have
between the wall and injector (may call for a thin or thick "O" ring).
Since my injector holes are made on my mill, they are probably not Mazda
stock and so my "O" rings would likely not be suitable for your needs.

   Perhaps John Slay who also used "O" rings might recall what size he used.
You can go to your local auto store and perhaps get them, but you can find
these boxes of  O rings with dozens of sizes on sale for a few dollars at
times.

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "Steve Brooks" <steve@tsisp.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, March 06, 2004 8:28 AM
Subject: [FlyRotary] Re: Injectors


> Ed,
> That's a great idea.  I'll see if I can find some.  Do You know off hand
the
> size required ?  I'm using the standard Mazda Purple injectors.
> Steve
>
>  -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]  On
> Behalf Of Ed Anderson
> Sent: Saturday, March 06, 2004 8:17 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Injectors
>
>
>
> ----- Original Message -----
> From: "Steve Brooks" <steve@tsisp.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Saturday, March 06, 2004 8:09 AM
> Subject: [FlyRotary] Injectors
>
>
> > When I ran my engine I had trouble getting it to idle down.  It wanted
to
> > run a higher RPM than I thought that it should.  I checked for any air
> > leaks, and after closing a bypass hole in the throttle body, it seemed
to
> do
> > better, but if I put a plate over the throttle body the engine still
runs,
> > telling me that its getting air somewhere.
> >
> > I think that its getting air around the fuel injectors.  I'm using the
> > injector tubes from Paul Lamar, and I noticed when I installed the
> injectors
> > that a couple of the tubes were a little loose compared to the other
two,
> > and all of them were not as snug fitting as the original Mazda fuel
rail.
> >
> > I've been considering putting a bead of silicone rubber around each
> injector
> > to seal off the outside air.  Does anyone have an opinion about that, or
a
> > better suggestion ?
> >
> > Steve Brooks
> > Cozy MKIV 13BT
> > CH 25 - finishing
> >
> Steve, what I have used successfully to stop air leaks are rubber/vito "O"
> rings.  Depending on how much clearance you have between the walls of your
> injector holes and the injector, an "O" ring around the injector before
you
> plug it into the hole may be all that is needed.  Torquing down the fuel
> rail compresses the "O" ring and seals off air leaks..
>
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
>
>
>
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