[Diy_efi] MGB EFI

[Tyler Madia]

Wow!  Great links, thanks!  Sounds like a port injection setup just isn't
going to happen anytime soon.  I'd be more than happy with a TBI setup but
I'm not sure how to go about it.  Could I just take, say, a Fiero TBI setup
off a 2.5 liter and either lower the pressure or use smaller injectors to
match my 2 liters?  Or will I have to find a MAF system?

Tyler

----- Original Message -----
From: "Jean Belanger" <jean_belanger at sympatico.ca>
To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
Sent: Friday, February 07, 2003 9:45 PM
Subject: RE: [Diy_efi] MGB EFI


> You might want to have a look at Marcel Chichak's site to get an idea of
the
> problems with port injecting a siamese-port engine.
> http://www.planet.eon.net/%7Echichm/efi/siamese.htm
>
> You can also have a look at his attempt to do it on an a-series engine:
> http://www.planet.eon.net/~chichm/efi/efi.htm
>
> Basically the problem is that you need accurate injection timing and fast
> and big enough injectors to be able to complete the injection while the
> intake valve of cylinders 1 and 4 are open otherwise the fuel will go in
> cylinders 2 and 3. It may not be clear but you'll get it if you read
> Marcel's page.
>
> Hope that helps,
> Jean
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of WEG1192 at aol.com
> Sent: February 7, 2003 11:14 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] MGB EFI
>
>
> In a message dated 2/7/03 10:36:54 PM Eastern Standard Time,
> tmadia at uswest.net writes:
>
> > Unfortunately the firing order is 1-3-4-2 so each injector would have to
> >  fire twice then switch.  Aargh!
> >
>
> Yep, thats a problem. cylinder 4 would get skipped over and cylinder 3
would
> get two shots of fuel.
>
> What about reprogramming a 7747 TBI ECM with 4 cylinders and then wiring a
> single TBI injector into both injector drivers? I just checked and there
is
> a
> 4 cylinder setting in the 7747 binary. This is something I have wanted to
> try
> but lacked a 4 cylinder to try it on. Might take some heavy duty tweaking
of
> the binary though.
>
> JW
>
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