[Vwdiesel] INCREASING AND DECREASING FUELING

[Libbybapa at wmconnect.com]

In a message dated 12/9/05 9:51:34 AM US Mountain Standard Time, 
svend at prcn.org writes:


> --Andrew
> in Flagstaff----put an issue on the table that affects us all.---Thank you 
> Andrew.. ---
> You may be wrong ?  --but it got us thinking ? ---Ja.
> 

I may indeed be wrong.  I get what was said regarding increasing fuel merely 
increasing power up to the point where efficiency drops off.  That may be 
true, but my imagination still has a little trouble with it.  I imagine that boost 
pressure is not just a function of fuel but also of the amount of air being 
pumped in and out of the engine.  

In a simplistic (or perhaps overly complicated) way, an non-running TD engine 
being cranked over by another TD engine directly driven will still 
potentially be able to get the turbo to spin and perhaps produce a negligible boost 
pressure. 

I imagine that if messing messing with the aneroid spring perch and cone 
rotation one can achieve a situation where more air is being pumped into the 
engine by the turbo than the pump is pumping fuel in to adequately burn.  I imagine 
there would be resultant losses in pumping that additional air through the 
engine.  The losses would be affected significantly by the proportion of blow-by.

Again, this is all based on my imagination and not any real hard facts, but 
still it's my story and I'm sticking to it (for now).

Andrew