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1983 UrQ parts fiche question -Reply
In message <199707101256.IAA00141@ns.tamsconsultants.com> firstname.lastname@example.org writes:
> Not sure I know what the forced air feed is unless you are
> refering to the injector cooling fan and shroud, which I have.
> The long style inserts have two holes near the top, on the
> side, presumably to allow air to cool the injector. The short
> stubby inserts I have don't have these holes.
Hmm. I thought the 13mm ones were always long?
I'm not sure exactly when the change was made. It may have been for the MB
engine, but I think I've seen it on a WR ...
Anyway, the inlet manifold has a channel cast into it that bypasses the
throttle butterfly and supplies various users of boost at the back of the
manifold. With forced air injector cooling, there's a short air pipe from the
channel cast in the manifold over to where the injectors are. High pressure
air (not much of it, though) passes down this pipe and through a longtitudinal
hole drilled along the manifold and passing through the injector ports. The
holes in the injector seats permit this air to swirl around and cool the
> Phil, do you always travel with your fiche, or are you taking it
It works hard. I took it to Cambridge for the day.
I spent three hours last night dismantling and reassembling the fuel injection
system to change the combined system and control pressure regulator valve. I
also discovered that the gearbox oil level was lower than I'd like, and there's
a design fault in the after-market wiring harness. In the circumstances, I
though I'd just load the workshop into the car. Just in case.
Committee Member, UK Audi [ur-]quattro Owners Club