MGB

[Orin B. Harding]

>I need to know what level of electronics design and assembly you are at.
>Don't be modest, give it to me straight and it will help me give you the
>right ideas.
>

Well, OK I'll not be modest...I worked as a field service rep, in the industrial/HVAC controls industry for years and am now in sales.  Have most of the basic stuff: Logic probe, scope, DVM, etc. and access to storage scope, etc.  The "electronics" portion of such a project would present no problem.  I also have a lathe, milling machine, drill press, etc. so making mechanical adaptor parts will not be a problem. (I did install the Bosch LU Jetronic, making the wiring harness, adaptors, etc.)
>
>The Starion air mass meter was fitted to every Starion and Conquest ever
>made anywhere in the world from 83 to whenever they stopped. I believe a lot
>of other Mitsubish turbo cars were fitted with it as well, all from the same
>era. In a junk yard you need to remove the whole airbox and disconnect it
>from the loom. I believe the air box is fixed with 2 bolts through the
>fender wall.
>
>If you must stay with one injector, it needs to be sized pretty accurately.
>How much power do you expect from the engine -  125HP?

I have the software, from MSD, and 52#/hr. is about right.  I expect to produce between 110 and 120 HP
>
>I think someone on the list will be able to calculate an injector size for us.
>
>Now, the system I am proposing is radically different in operation from the
>normal EFI. Normal EFI injects once per firing stroke if sequential, and
>twice if batch fired, and the injection pulse width varies from 2 to 20 mS.
>This system will inject faster as the air speed increases and the pulse
>width wil be constant. It will be adjustable, but as your basic mixture control.

At 6,000 RPM this comes to 5 MS if fired once/cycle...
>
>The air mass meter will give out a train of pulses which increases in speed
>as more air is drawn though it. In theory each  certain amount of air
>requires a certain amount of fuel, so you count the number of pulses and
>give a squirt from the injector. Then it doesn't matter what the engine is
>doing, if it is using air, it is getting the mixture in the correct
>proportions. This will run the car fine.
>
>The fine tuning ie cold starts, battery voltage compensation etc, need to be
>done to make the vehicle an everyday practical proposition, and exactly how
>you do this will depend on you electronic skills.

Is there enough info. on the system to enable me to figure out what to change to adapt it to my car???


 However, you should be
>able to get the whole system working nicely for $50 plus the air meter ($100
>or less?)
>
>Peter Wales
>President Superchips Inc
>Chairman Superchips Ltd        "Timing is everything"
>
>
>All and all sounds like something to look into.....Recommended reading???...I'll stop by the local PEP Boys and see what the Haynes manual on these cars has to offer.  They usually have good wiring diagrams, etc.....

Looking forward to your reply, and If I don't talk to you in the next day or so, MERRY CHRISTMAS to you and yours..

Orin Harding - Greensboro, NC
('74 MGB-GT - '79 MGB Roadster - '95 3000GT, BRG of course!)