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What is a WX engine?
In message <firstname.lastname@example.org> Brett Dikeman writes:
> I just made a fool of myself.
And qualified for permanent membership - we all make fools of ourselves
from time to time.
> MB's are in '86 5000CST's maybe?
No, I don't think they're in anything but 1988/9 ur-quattros. It _may_ be,
though, that Audi numbered the MB/1B/MC-2 in sequence (they're basically the
same engine) and just changed the letters. That would roughly bring the
numbers into sequence.
Don't expect to find logic such as ascending collating sequences in Audi
codes. The MC (in its initial form) _preceded_ the MB. It looks like Audi
created the MAC12D (the MB's ECU) by _removing_ emission controls from the
I'm beginning to detect some sense in all this. It has to do, largely, with
emission controls in Audi's markets. The microfiche states that the WX engine
was developed for the Swiss and Swedish markets - these were the first with
rigorous emission controls. Three years later, when Audi started shipping ur-
quattros to the USA, they used the Swiss/Swedish engine because the standard
european engine (WR) could not meet US requirements. In 1988, when the new
engine for the 5000 was available, it was adapted for ur-quattro use in those
countries that did not have emission controls. Perhaps _only_ the RHD
countries - UK, Eire, NZ, Japan, etc.? At this point, the WX was probably
still in production for Switzerland, Sweden and perhaps even Germany - the
wiring diagram for the late WXs was issued six months _after_ the wiring
diagram for the MB.
The 20V (RR in the ur-quattro, 3B in the 5000) was developed, according to the
documentation, specifically to meet stringent emission controls.
Committee Member, UK Audi [ur-]quattro Owners Club