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Date: Tue, 22 Mar 2005 16:36:53 -0700
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: fuel injector size, and redrive losses
Message-Id: <20050322163653.7832fd9f.rlwhite@comcast.net>
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Hi Jerry,

Try here:
http://www.buyfordracing.com/shop/product_info.php?products_id=3D360

$259 for a set of 8.   If you only want 4, I might be interested in the oth=
er
4.  Write me off list.=20

I used to have this on the Wiki, but everything since March 8 has magically
dissapeared.

Bob W.  (More frequent backups on the agenda.)

On Tue, 22 Mar 2005 18:29:39 -0500
Jerry Hey <jerryhey@earthlink.net> wrote:

> Thanks Ken,  since I am building the fuel rail and injecting into the=20
> bell mouths the Ford's can be easily installed.  Glad to hear the=20
> electrical hook up is the same. If I just say "Ford 42 lb injectors,"=20
> are they properly identified?    I'm tired of planning.   This week end=20
> I will start to actually build the intake.   Jerry
>=20
>=20
>=20
>=20
>=20
> On Tuesday, March 22, 2005, at 06:06 PM, kenpowell@comcast.net wrote:
>=20
> > Jerry, the Ford injectors are not directly compatible.=A0 Here are the=
=20
> > details:=A0
> > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 ENGINE SIDE=A0=A0=A0=A0 FUEL RAIL SIDE
> > Ford=A0=A0=A0=A0=A0=A0=A0=A0=A0 0.55"=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0 0.55=A0=A0=A0=A0=A0
> > Mazda=A0=A0=A0=A0=A0=A0 0.65 (with the FAT Mazda rubber ring)
> > =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 0.435
> > Note that the electrical connector is the same (center spline=20
> > top/inside and center lower outside).=A0 So, the Ford injector will hoo=
k=20
> > up electrically but the fuel connectors must be different.
> > Ken Powell
> > Bryant, Arkansas
> > 501-847-4721
> > =A0
> >
> > -------------- Original message --------------
> >
> > > Ken, are the Ford injectors interchangeable with the stock Mazda
> > > injectors as far as size, plug and so on? If so, do you have a part
> > > number? BTW sorry but there is no way you can run a p port at 7500
> > > rpm and only get 225 hp. Can you accept 240? Jerry
> > >
> > >
> > >
> > >
> > >
> > > On Tuesday, March 22, 2005, at 03:48 PM, kenpowell@comcast.net wrote:
> > >
> > >
> > > But this graph was for a carburated engine so it really
> > > proves nothing. Besides, the engine only needs to be as rich as we
> > > want to run - you can't hurt the engine by running lean (I know, if
> > > you run it into the trees on a 100 F. day that will HURT it!!!). I
> > > have not seen any graphs showing power improvement beyond 0.6 on a NA
> > > engine and with very little to be gained by going beyond .55. If
> > > anyone can educate me differently please do so (no kidding, I'm=20
> > trying
> > > to learn). I'm planning on using 42 lb Ford injectors for my P-Port
> > > motor, if this isn't enough I want to know (planning on 225 HP at=20
> > 7500
> > > RPM).
> > >
> > > Ken Powell
> > >
> > > Bryant, Arkansas
> > >
> > > 501-847-4721
> > >
> > >
> > >
> > >
> > > -------------- Original message --------------
> > >
> > >
> > > v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);}
> > > w\:* {behavior:url(#default#VML);} .shape
> > > {behavior:url(#default#VML);} st1\:*{behavior:url(#default#ieooui) }
> > >
> > > Arial0000,0000,8080Rus
> > > ty,
> > >
> > >
> > > Arial0000,0000,8080Are
> > > you sure you=CCre allowing yourself enough margin on the top end by
> > > using .55 bsfc. This chart (snitched from the other list) indicates
> > > that .55 is about right up to around 7500, but at 8000 rpm bsfc will
> > > be up around .60. What does that do to your hp numbers?
> > >
> > >
> > >
> > > Arial0000,0000,8080
> > > smaller>
> > >
> > >
> > > Arial0000,0000,8080Mar
> > > k
> > > S.
> > >
> > >
> > > Arial0000,0000,8080
> > > smaller>
> > >
> > >
> > ><
> > >
> > >
> > >
> > > Arial0000,0000,8080
> > > smaller>
> > >
> > >
> > ><
> > >
> > >
> > Times New Roman
> > >
> > >
> >
> > >
> > > From:Rotary motors in
> > > aircraft [mailto:flyrotary@lancaironline.net] On Behalf
> > > OfRussell Duffy
> > >
> > > Sent: Tuesday, March 22, 2005 2:25 PM
> > >
> > > To: Rotary motors in aircraft
> > >
> > > Subject: [FlyRotary] Re: fuel injector size, and redrive
> > > losses
> > >
> > >
> > > Times New Roman
> > >
> > >
> > > Times New RomanRC Engineering's calcs show
> > > that you are good to 302 HP at 43 psi fuel pressure, .50 BSFC, and
> > > 100% duty cycle. Of course you can't run the injectors at 100%
> > > (except maybe briefly like a drag race, not applicable to aircraft).
> > > So at 80% duty cycle the 38 lb injectors should be good for 242 HP.
> > > Enjoy your idle!!! Your injectors are big enough unless you P-Port
> > > and turn at least 8000 RPM.
> > >
> > >
> > >
> > > ArialFFFF,0000,0000Hi
> > > Ken,
> > >
> > >
> > > Times New Roman
> > >
> > >
> > > ArialFFFF,0000,0000RC
> > > Engineering's calc shows the same as the fuel calculator that I
> > > posted the other day. Four 38 lb/hr injectors, at 80% duty cycle, .55
> > > BSFC, should be good for about 220 HP at the flywheel. I imagine that
> > > will be enough for the current engine, but not by a wide margin. I
> > > plan to run this engine as high as 8000 if I can, though I'll be
> > > amazed if I can get beyond 7500. Don't need no stinkin' P-Port for
> > > these rpms :-)
> > >
> > >
> > > Times New Roman
> > >
> > >
> > > ArialFFFF,0000,0000On
> > > the fuel spreadsheet that I posted (stolen) the other day, it gives a
> > > HP figure for the flywheel, and rear wheels. The estimate for
> > > the power loss due to a manual trans and diff is 15% on this
> > > spreadsheet. Anyone know what this amounts to for our redrive, and
> > > prop?
> > >
> > >
> > > Times New Roman
> > >
> > >
> > > ArialFFFF,0000,0000Cheers,
> > > or>
> > >
> > >
> > > ArialFFFF,0000,0000Rusty
> > > (hoping Ed out types me)
> > >
> > >
> > > Times New Roman
> > >
> > >
> > > ArialFFFF,0000,0000
> > > fontfamily>
> > >
> > >
> > > <
> >
>=20


--=20
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