Diff between theory and practice

[Todd Knighton]

Some other things to consider.
On some of the Twin-Turbo Porsche stuff we do, we commondly run out of
fuel.  Check your fuel pressure, is it staying up.  Are you compensating
for a fuel pressure drop by opening the injector longer.
What we've observed has been a fuel curve that's almost identical to the
torque curve on a ms based injector opening time based map.  Should be
the same for most others.  You will use more fuel at 6000 than at 5500
because your firing the injector more often, however, if the peak torque
has reduced, your fuel requirements should also, unless something wacky
is going on.  Spark is going away, valve float maybe, or as I suggested
above, fuel pump is giving it up.


Just a note

Todd Knighton
Protomotive Engineering