Introduction from Perth, Western Australia

[Mike (Perth, WA)]

Hi chaps,

I've just joined and interested in EFI systems. Here is some of my b/ground,

In 82 my project thesis for Western Australian Institute of Technology was
to do with EFI and transmission control. Some work was done on a 72 ford
escort (4 cyl 1300 side cam bowl in piston flat head crossflow n/a). Used
the original inlet manifold, cut to take bosch injectors off a 2L combi using
clips from a chrylser, soldered fuel rail, AFM of the same 2L combi (flap
type - yuck). Made my own ECU from a Z80 4MHz, LED display, keyboard, i/o
mapped, all i/face electronics were a bit basic but I did have reliable
cpu/software operation. project long since abandoned as the money seemed
better spent souping up the esky in all the conventional ways etc.

For last few years have worked on inverters, modulated alternator field
control - upgraded a Remote Area Power System (RAPS) in jungle of Sabah,
eastern Malaysia, only system of its kind anywhere nearby 99% efficient
charger operation - some product info on my link below along with pictures
of the site and equipment (Am interested in licensing alternator based
battery charging - another story).

Am now designing local area paging equipment and working on my vehicle,
3L six straight nissan, auto, turbo T3 9.5psi, twin tyres front and back
(looking for more - 125/85VR16 & 125/90VR16 ?). Runs OK and the RB30ET
engine is a great basis for some serious mods... Though am now looking at
some econoy issues as petrol is around A$86 c/litre.

Have built amps for the bosch hotwire AFM (the cal maps for these change
over time and the amp allows me to tune up a richer mixture on boost).

Have my own electronics lab with appropriate analysers, pc, instruments etc

My main interest is to install my own EFI to replace the existing bosch
unit but in the same housing so its a drop in replacement - except for a
daughter board to take extra injector, water injection, laptop comms,
security and other nice additions.

Have started a MIG course (did stick welding before) and want to put together
my own exhaust twin T3. Need to move my powersteering pump and expect to run
this off a 400watt ex tape servo motor (can then put in anywhere) as there's
stuff all room in the engine bay and taking out the ps pump/pulley will
allow nice laminar air entry straight to turbo. Will be doing a 12 to 40v
inverter (40A) to run the motor at worst case low vehicle speed.

Has been suggested I can spool up twin T3's faster if some water is injected
into the exhaust manifold before the turbine - we'll see, when I get it done.

Right now I'm interested in peripheral technical issues to do with EFI and
hope to learn of your experiences and hope I can offer some alternative
ideas or a different perspective.

At moment I'm curious of best conversion resolution for hot-wire AFM, I've
seen the 8051 projects with 8 bit resolution, I thought 10 bits would be
more appropriate for multi-point as a minimum - can use an SPI 12bit and
wonder if there are any comments on best AFM resolution. Oh incidentally,
the output from my bosch (exisiting) AFM is log. ie. Quiescent at around
1.6v then rises logarithmically to around 5v at maximum load - anyone
have any observations on this type of AFM and practicality of using log
to linear i/p conditioning with their EFI front end ?

Tah





Rgds


Mike Massen

Ancient Sufi saying:
        "Should your God save you from adversity, choose another God"

Pictures of site installation at Mendulong near Sipitang, Sabah (Malaysia) for
container based RAPS...   http://www.wantree.com.au/~erazmus

Vehicle modifications on GMH Turbo, twin tyres, possible 175Kw at wheels
Preliminary pictures at http://www.wantree.com.au/~erazmus/Twin_tyre_vehicle/

My editorial on twin-tyre opinion and good reference about tyres:-
http://www.geocities.com/MotorCity/2195/ttyreopinion.html

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