[Vwdiesel] Fueling screw on VE pumps. --( Rabbits )

[H.Hagar]

Maybe I'm all wet but that's the way I've seen it.
     Loren


Well Loren  you may be a little "moist"   but you are certainly not all wet. A lot of us
respect your threads a lot . And the fact that I am not a mechanic ---gives me a little
excuse for getting things wrong.

Note that I said "much"  not "exactly".    But since a lot of us are gasser kids --it is difficult
not to draw a comparison.   Lets take a close look at "Mixture" on a gasser with a carburetor.

Definition of mixture ?   Considering a constant RPM -- the ratio of fuel and air required to
burn the fuel. Loren remember we have to bring the beginners along as well.
Why a constant RPM ?  because I have a landrover here with a Governor on engine.
Isospedic looks like UK stuff. And what I say was tested on engine. Raise float level
and mixture get rich to a point where engine belches black smoke ---but RPM stay the
same. Lower the level and engine will slow down if fuel goes below  a minimum . Ergo we now have
a mixture control. A lever pushing on float will do it.

On the gasser if we lower the level it affect mixture at ALL Rpm's .Enter octane rating
and it becomes a little more complicated ---Rich or Lean gives two ratings.  --like
flyboys know --80 / 87 .  80 is lean 87 is rich.  So if your airhead knocks give her a tad more
fuel.

Now for the Rabbit :   The control-sleeve position at any RPM controls fuel ---"Mixture" so
if you turn fueling screw in --it mechanically moves sleeve to cover bleed hole more.
And at any load or RPM it provides engine with more fuel. That is why you must always reset
idle screw if you change "FUELING" screw setting. Injected fuel must be low to obtain idle.
A diesel will not idle with lots of fuel going in it will speed up.  Enter the governor ---the airhead does
not have one (or need) but the diesel engine has one and it is inside the Injection Pump.
Moving the throttle (pedal) does not directly control fuel delivery --the governor does---and
pedal is connected to governor. A lot of springs involved.

So turn in the fueling screw and you increase fuel at any pedal position. Load is involved as well.

I sure like that  Gary Orlando  saying  ---IMHO---- IMHO ---more detail if more members are 
interested.

Hagar.

PS:  Remember English is not my first language.