Thanks Ken,  since I am building the fuel rail and injecting into the bell mouths the Ford's can be easily installed.  Glad to hear the electrical hook up is the same. If I just say "Ford 42 lb injectors," are they properly identified?    I'm tired of planning.   This week end I will start to actually build the intake.   Jerry





On Tuesday, March 22, 2005, at 06:06 PM, kenpowell@comcast.net wrote:

> Jerry, the Ford injectors are not directly compatible.  Here are the > details: 
>             ENGINE SIDE     FUEL RAIL SIDE
> Ford          0.55"                     0.55     
> Mazda       0.65 (with the FAT Mazda rubber ring)
>                                                0.435
> Note that the electrical connector is the same (center spline > top/inside and center lower outside).  So, the Ford injector will hook > up electrically but the fuel connectors must be different.
> Ken Powell
> Bryant, Arkansas
> 501-847-4721
>  
>
> -------------- 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 > 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 > 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 youÌre 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>
> >
> >
> > <
>