Marine FI was RE: Projection

[Greg Woods]

> Can the 4Di be used without the O2 sensor?  (I realize tuning becomes
more 
> critical.)  Due to water-cooled exhaust system my marine application
makes 
> implementation of an O2 sensor difficult.  <snip>.....  
> So for now no O2 sensor is my goal.)
> 
> Holley is advertising a marine 4Di which should go on sale in a couple
of 
> months.  I've spoke with Holley tech twice.  One rep said that the
marine 
> 4Di must use the O2 sensor and the other one said that it wasn't
necessary. 
>  Sadly typical for Holley.
> 
> Thanks,
> 
> Mike Jones

Mike,

I also have a marine engine with a wet exhaust.  It's a 4.3L mercruiser
which is basically a marinized GM 4.3L.  I've been thinking about how I
could use
a standard 4.3L GM TBI and ECM on this.  I'd have no O2, no EGR, no 
Smog pump and no spark distributer control:(.  The marine 4Di system
sounds kind of tempting, but I'd like to try and go the lower cost (junk
yard available) route of the GM stuff.

Does anyone have any thoughts about how I might adapt a GM ECM
for this type of situation?  Will it run without all the above mentioned
hooked up?

Greg Woods        gwoods at symtx.com        Austin, TX
back into lurk mode....