I need some information about the timing triggers on the 20vt engines.

[urq]

Yes, the flywheel sensors are very similar between the compterized CIS 10v
of the urq and the Motronic 20v of the S4.  Where the urq has a distributor
and a Hall sender in it to determine odd vs. even "banks" the S4 engine
(AAN?) has the cam timing sensor mounted up front with the cam pulley.

I would imagine that you would be transpanting the control hardware from the
S4 with the engine itself, so it shouldn't be a big deal ... unless you were
having to do something like "mix and match" with the flywheel.  If you
needed to do this you would want to be very careful of the reference pin
location relative to TDC and the number of teeth in the flywheel ...

HTH!
Steve Buchholz
San Jose, CA (USA)
>
> A guy asked me some things about what needs to be done with the triggers
> when installing a S4 engine in an urq, I found that I had misunderstood a
> few things about the triggers on the 20vt engines. Motronic for me is the
> same as a 60-2 trigger wheel but the way he described it it looked just
like
> on the 10vt engine, one crank sync pulse and one pulse per tooth on the
> flywheel. Is this correct?
>
> What kind of trigger is on the cam? Is it a single sync pulse for
> compression TDC or is a standard 60-2 trigger wheel installed there?