[Diy_efi] injecting 5 port head

[Jean Belanger]

Phil,

There's been quite a few discussions on that subject on the Megasquirt forum
and the TurboMinis.co.uk forum. Marcel Chichak's web site
(http://www.planet.eon.net/~chichm/efi/siamese.htm) goes into the details of
the problem of injecting the A-series engine and his own failed attempt
(http://www.planet.eon.net/~chichm/efi/efi.htm). You can also have a look at
Rover's patent for the MPi Mini which shows how they went about implementing
port fuel injection for the A-series engine.

I am currently modifying the MS2 code to support the needs of the siamese
port injection. I should have a first alpha version before the end of the
year. If you're interested go to the TurboMinis.co.uk forum where I'll be
making the announcement when the code is ready.

Regards,
Jean


> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
> Behalf Of Phil
> Sent: December 24, 2006 12:06 PM
> To: diy_efi at diy-efi.org
> Cc: bob griffith
> Subject: Re: [Diy_efi] injecting 5 port head
> 
> positioning injectors near split/valves impossible; injectors need to be
> in
> runners;  we assume the problem lies in that
> the pairs of cyls (1&2/, 3&4) are adjacent in firing order followed by 2
> rest periods, and that if injection was in that sequence it would resolve
> fuel distriibution anamly. Engine app is higly tuned short stroke Cooper
> "S"
> (sixties) BMC A series.  phil
> ----- Original Message -----
> From: "Adam Wade" <espresso_doppio at yahoo.com>
> To: <diy_efi at diy-efi.org>
> Sent: Saturday, December 23, 2006 8:07 PM
> Subject: Re: [Diy_efi] injecting 5 port head
> 
> 
> > --- Phil <philhunt at comcast.net> wrote:
> >
> >> We think you'd need a sequential sytem
> >> w/2injectors/runner.  Anybody on this?
> >
> > That sounds reasonable.  Is this the old MG inline 4?
> > A lot would depend on port shape, I would think; if
> > the split starts at the mating face for the manifold,
> > it might take some trial and error regarding injection
> > timing, but it should not be too much bother to get
> > one injector per cylinder running without much
> > "crosstalk" between cylinders.  If the split is an
> > inch or more from the mating surface inside the head,
> > this will become much more challenging, and you may
> > wish to machine the head so that the injectors will
> > fire directly into the port(s) after the split.  This
> > may be techinically very difficult, and may also
> > violate the class rules, depending on your racing org.
> >
> > | Kawasaki Zephyr 615 (Daphne)       Kawasaki Zephyr 550 (Velma)|
> > | "It was like an emergency ward after a great catastrophe; it  |
> > |   didn't matter what race or class the victims belonged to.   |
> > |  They were all given the same miracle drug, which was coffee. |
> > |   The catastrophe in this case, of course, was that the sun   |
> > |     had come up again."                    -Kurt Vonnegut     |
> > | M/C Fuel Inj. Hndbk. @ Amazon.com -  http://tinyurl.com/6o3ze |
> >
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