REFLECTOR: Running LOP
steve korney
s_korney at hotmail.com
Sat Dec 16 11:48:10 CST 2006
Andy...
Lycoming makes nozzles sized from.028 to .031 in diameter. Lycoming also
makes two piece nozzles with a drop in insert ... Those inserts can be
change... Also from .028 to .031... Normally, a stock nozzle is .029 which
gives you room to go richer or leaner...Bigger or smaller... On a four
cylinder Lycoming IO-360, a .001 bigger nozzle makes that cylinder run 30
degrees cooler... It also makes the other three cylinders run 10 degrees
hotter because of the total pressure drop in the system...You will also have
to re-calibrate your fuel flow gauge...Because of the drop in pressure, your
system will show less fuel flow. If you have a fuel flow computer, it
should be OK.... Your mileage may vary.... Slightly... Hope I didn't forget
too much....
Best... Steve
----Original Message Follows----
From: "Andrew Ellzey" <ajlz72756 at yahoo.com>
Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Subject: Re: REFLECTOR: Running LOP
Date: Sat, 16 Dec 2006 04:58:56 -0600
Steve,
Can you elaborate on how you are tuning your injectors?
Andy Ellzey
----- Original Message -----
From: "steve korney" <s_korney at hotmail.com>
To: <reflector at tvbf.org>
Sent: Friday, December 15, 2006 8:58 PM
Subject: Re: REFLECTOR: Running LOP
>
> Hi Scott...
>
> I don't see anything magical in a full flow injector that is made for
> Lycoming by GAMI that's different from the ones that Lycoming makes...
We
> can tune them all the same...
>
> Best... Steve
>
>
>
> ----Original Message Follows----
> From: Scott Derrick <scott at tnstaafl.net>
> Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> To: Jim Agnew <Jim_Agnew_2 at yahoo.com>, Velocity Aircraft Owners
and
> Builders list <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Running LOP
> Date: Fri, 15 Dec 2006 16:51:49 -0700
>
>
>
>
>
>
>
> Really, my IO-360 200HP didn't? The fuel distribution was horrible..
> over 1.5 GPH from first to last.
>
>
>
> Whats your range? Tuned doesn't necessarily mean equal length. Of
> course precision injectors that match can make a huge difference.
> Cheapo injectors like Lycoming makes and the best tuned intakes are a
> waste.
>
>
>
> Scott
>
>
>
> Jim Agnew wrote:
>
>
>
>
> Sorry Scott,
>
>
>
> My Lycoming IO-360 200HP angle valve has tuned intakes so they at
> least moved up to the 50's!
>
>
>
> Jim
>
>
>
> James F. Agnew
>
> Jim_Agnew_2 at Yahoo.Com
>
> Tampa, FL
>
> Velocity 173 Elite Aircraft Completed & Flying
>
>
>
>
> -----
> Original Message ----
>
> From: michalk <michalk at awpi.com>
>
> To: Velocity Aircraft Owners and Builders list
> <reflector at tvbf.org>
>
> Sent: Friday, December 15, 2006 12:52:02 PM
>
> Subject: Re: REFLECTOR: Running LOP
>
>
>
> For my fuel tables on the Autronic, I am going to have areas
> designated
>
> for LOP ops. No mixture knob, the engine will automatically run in
> that
>
> regime.
>
>
>
> Scott Derrick wrote:
>
> > Steve,
>
> >
>
> > Because some of the engine monitor companies still live in the
> 40's like
>
> > Lycoming does..
>
> >
>
> > There isn't a fuel injected automobile made today that doesn't run
> LOP
>
> > either all the time or automatically adjusts to it when it can.
>
> >
>
> > ROP operations are used on most Lycomings and Continental engines
>
> > because the fuel distribution is so god awful you have to waste
> 10% to
>
> > 30% of your fuel to get a semblance of smooth running. This came
> to be
>
> > because it was easy(lazy) and gas was cheap in the 40's.
>
> >
>
> > 60 years later Continental is making their version of precision
>
> > injectors(been on cars for 20 years) for some of their big bore
> engines,
>
> > Lycoming is still running in the "Up and Locked" position. I'm not
> sure
>
> > if either company has heard of tuned induction or tuned exhaust,
> give um
>
> > a couple more decades and they'll come around.
>
> >
>
> > Vision's VM1000C has a LOP lean-to-find function as do a couple
> others.
>
> > GRT told me they are in the process of adding it.
>
> >
>
> > Scott
>
> >
>
> > steve korney wrote:
>
> >
>
> >>
>
> >> (Snip)...A LOP lean-to-find option is nice on an engine
> monitor but
>
> >> most just
>
> >> offer a ROP lean-to-find..
>
> >>
>
> >> Wonder why that is Scott...
>
> >>
>
> >> Best... Steve
>
> >>
>
> >>
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