My DIY EFI

[Todd Knighton]

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Dave,
	Attached is the binary code for a Porsche 911.  Disassemble it and take
a look.  It's got all the stuff you need right there.  Just get the I/O
ports right and you could have working code.  
	It uses and Air Flow meter, though that's easily changed to Throttle
position, pressure sensing, or hot wire.  Whatever.  The basic code
works.  You might want to get rid of the idle comp. and O2 sensor stuff
if you're going TPS.
	Schematics aren't available from Bosch on any of this stuff.  I've
reverse engineered all the a/d channels and some of the output ports. 
The problem is most of the chips are proprietary and have no designation
what so ever other that some Bosch number that's meaning less other than
date.
	I personally think some of the levels of sophistication that's going
into some of these DIY EFI's are a bit ridiculous.  I've done a lot of
work with some antiquated units as well as very sophisticated units and
when it comes down to raw horsepower, there wasn't much difference to
speak about.  Maybe CAN bus stuff might be good for a electronic dash
board, but personally I can't read flickering digits at 200+ Mph, give
me analog any day.

Todd Knighton
Protomotive Engineering.

DJohn77284 at aol.com wrote:
> 
> Todd, you say that Bosch used 8051s or derrivatives.
> 
> I would be interested in seeing anything really - coding, schematics, etc.
> Can you point me in the right direction so I can get a peak at these?
> 
> The reason that I'm going for an 80c32 is that I've already got a few. I've
> also been looking at the Phillips range and the one's with IIC and CAN BUS
> look interesting. Any thoughts?
> 
> Regards,
> 
> Dave.

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