[s-cars] SOURCE needed for 45or47 high Z , bosch or siemens

[Alvin Labonite]

Craig,

How long have you been running with D/L? I would assume you got flying
colors at emissions too?

Gotta get the Portofino (sp) pizza get-2-gether going again. :)


On 10/17/06, lebakken1 at netzero.net <lebakken1 at netzero.net> wrote:
>
>
>
> -- Theodore Chen <tedebearp at yahoo.com> wrote:
> tom,
>
> your timing was good, because injectors and chip are next on my
> shopping list.  it's pretty hard to find things in the archives now,
> so i'm glad you asked the question.
>
> craig, are the delphi injectors actually that poor or just not
> designed for this application?
>
> -t.
>
> I doubt they are "poor", but I wouldn't doubt that there are some
> compatibility issues as far as the "injection mechanism" when
> comparing the two, and then how the mechanism reacts to Motronic
> inputs. The Racetronix website for the L/D 37# speaks of a floating
> perforated disc design - not sure if the Bosch uses the same
> mechanism. (Where is our Bosch injector expert....?) Physically, at
> the injector tip, there is a very noticable difference; you can see
> four SMALL ports on the Bosch injector, whereas the L/D has two
> shrouded nozzles. How this may affect atomization I am not sure, but
> I would bet that the AAN intake manifold and cylinder head were
> designed in a way that they expect to receive fuel in a certain
> direction/pattern. This physical difference in the tip leads me to
> believe that there would be a difference in delivery. Also, under
> light throttle, the L/D injectors seem to dump more fuel, as the
> engine will load up, then stumble when more throttle is applied. This
> is well documented.
>
> Others on the list are happy with L/D, although these seem to be
> engines past RS2. Of course, these engines tend to spend more time at
> high throttle, where the engine is more forgiving of how it receives
> fuel. Kind of like a Holley Double Pumper on a big block. Let it idle
> (which it barely can do) for a while, and fuel will practically be
> dripping out the exhaust. Mash the throttle, everything gets happy
> and you are holding on for dear life. It all depends on what you are
> looking for.
>
> My engine runs pretty good - but I have always had a WOT miss. This
> was cured somewhat by a 1.8 coil conversion. Maybe I should replace a
> knock sensor as someone recently suggested. I have gotten detonation
> before without timing retard, and my WOT miss seems to be timing
> retard but I didn't hear the detonation. My engine idles fine with
> the L/D's. Fuel economy is lousy, about 17 in mixed semi-aggressive
> driving, not sure if its the programming or injectors there. Have to
> clean the bumper every other tank so my car is not mistaken for an
> MBZ diesel.
>
> More often than not, it seems as if I have problems when I use non
> Bosch, non OEM components on my German machinery. I did however, go
> to a NAPA Stant thermostat. The OEM Wahlers are crap.
>
> HTH
>
> Craig
> 94 S4
>
>
>
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