[modeleng] Re: Injectors
- From: "Andy A" <AndyA@xxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Sun, 20 Mar 2005 20:24:29 -0000
Hi Phill
I didn't say 'correct' amount of lift, I said 'increased' lift. No doubt
there is some formula for working it out but using Martin Evans suggestion
of 1/3rd ball diameter improved the performance for it to no longer be an
issue and I have since used that as a guide on all my clacks fed by injector
without any problems. Going by the quality of some manufactures parts this
may explain why so many people have problems. It would also go some way to
explain why some people object to using axle pumps because of the power they
consume and by the same token explain the inconsistency in injector
performance. If all the ready made clacks have to little lift then they are
never going to work reliably. Practice wins over theory in my books on this
one.
Andy
----- Original Message -----
From: "Phill Smith" <steam@xxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Sunday, March 20, 2005 4:02 PM
Subject: [modeleng] Re: Injectors
Andy,
I seriously dobt that your check valve had the correct amount of lift, full
stop, regardless of what was trying to put liquid through it. The difference
with pumps is that it will raise the pressure (sometimes over 500 psi in
very poorly designed check valves) to SQUEEZE it through the available gap,
where as an injector can't do that.
For the pump to HAVE to raise the pressure so high, means that it is doing 5
times more work than it should be. This also means that it is taking 5 times
more power from the cylinders as well......
Cheers,
Phill.
----- Original Message -----
From: "Andy A" <AndyA@xxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Sunday, March 20, 2005 5:23 AM
Subject: [modeleng] Re: Injectors
> Not so sure I agree with you there. On one of my engines I could not get
the
> injector to work reliably. It wasn't until I modified the clack valve, at
> someone else's suggestion, to increase the ball lift that it worked
> correctly, regardless of what make injector I fitted. Until then I was
> sceptical of the idea as well.
>
> Andy
>
>
>
> ----- Original Message -----
> From: "Terry Lane" <tel@xxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Saturday, March 19, 2005 7:31 PM
> Subject: [modeleng] Re: Injectors
>
>
>
> Yeah, that theory derived from an LBSCism. Old Curly said that a clack
valve
> for an injector COULD have a long lift to the delivery ball, as it ain't
> floggin' up & down all the time like one fed by an axle pump does.
>
> > I would not believe that one too much.
> >
> > All correctly designed and made check valves will operate perfectly on
> > either.
> >
> > Next fallacy? <GRIN>
> >
> >
> >
> > ----- Original Message -----
> > From: "Harry Wade" <hww@xxxxxxxx>
> > To: <modeleng@xxxxxxxxxxxxx>
> > Sent: Saturday, March 19, 2005 7:56 AM
> > Subject: [modeleng] Re: Injectors
> >
> >
> > > At 11:34 PM 3/18/05 -0000, you wrote:
> > > >I think the item that causes the biggest problem for injectors are
the
> > clack
> > > >valves. The balls should have a diffrent lift for either pump or
> injector
> > > - Andy
> > >
> > > Which one to which?
> > >
> > > Regards,
> > > Harry
> > >
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