turbo conversion passes smog check

[Huw Powell]

 > Ed, congrats on the car passing.  I seriously think
 > the jurry is still out on the CIS-III ign combined
 > with turbos.

I do know Marc S tried it (at my insistence? curiosity?) and it was all
wrong on his MC running 034EFI.  I believe he currently is using the
original MC computer to run the ignition only with better success.

The E3 module probably just does things all wrong at some points on the
curve(s) for a turbocharged engine.

>>One other thing. I still notice the timing is
>>bouncing
>>around somewhat. I set it to 0 BTC and it stays
>>there
>>a while but then advances to 15 BTC (this is the
>>reason it failed smog the first time I believe).
>>Lately it has been doing less of this, maybe the
>>ignition computer is learning ??

I don't think that unit is capable of learning.  It does, however, run a
lot more advanced off idle than you set it, for what I have observed -
set it at, say, 15 DBTDC, and crack the throttle a tiny bit (ie, open
the idle switch) and it jumps to something like 45 degrees BTDC.
probably just what the NF/NG wants, but maybe qwuite wrong for a turbo
engine.  This is not, however, part of any rigorous series of
observations, just something I saw once that surprised me.

> You asked what you could do next?  New engine
> management my friend, you will not regret it.

 From what Marc tells me, the "next generation" of 034 will include a
tweakable (?) ignition controller, and a driver for some inexpensive GM
idle stabiliser valve.  Nice touches both of them, I think.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/