Schrick Cam installation

[Alan Pritchard]

Mine just has a nut holding the dizzy in position. Rotating the dizzy
definitely alters the timing in some way, I put the fuse in the fuel pump
(actually I have a jumper switch wired in) and altered the timing like that,
although I don't know what happens when you un-jumper again. When set to 22
btdc the car ran awful, so something definitely had changed, 16 and 18 felt
the same, so I opted to leave it at 18.... I don't know how the ecu can tell
that the timing has been messed with, afaik the only sensor it has is the
hall sensor on the dizzy, although saying that there is something on the
bellhousing which im not quite sure what it is. I would be interested to
find out mor though.

Best Regards,
Alan Pritchard

Network Administrator
Mechanical Design Engineer
Seaeye Marine Ltd.
+44 (0)1329 289000

 -----Original Message-----
From: 	David [mailto:duandcc_forums at cox.net] 
Sent:	04 May 2004 14:32
To:	Alan Pritchard; Quattro List "E-mail"
Subject:	Re: Schrick Cam installation

Your NG has adjustable timing? It should be locked in by the factory (some
sort of little anti-tamper tab on the dizzy to keep you from messing with
it). Mine still has it. Anyway, my understanding is that adjusting the
timing n a CIS-e III car is a bit more complicated. You have to do something
to keep the ECU from fooling with the timing for you. Since I've never taken
the locking tab off mine, I can't tell you exactly how to do it. I'm sure
someone here can. Another thought. If you aren't pinging on regular, you can
dial up the timing quite a bit more if you run premium. You'll get a bunch
more power...

Dave
87.5 CGT
SE Virginia, USA
============================================================
From: Alan Pritchard <apritchard at seaeye.com>
Date: 2004/05/04 Tue AM 06:30:30 EDT
To: "Quattro List (E-mail)" <quattro at audifans.com>
Subject: Schrick Cam installation

Ok, Installed my schrick 272 at the weekend. Took 2 hours with the right
tools on my 1990 90q. I tried loosening the manifold (ng manifold) bolts,
and cam shaft sprocket bolt by hand, to no avail, borrowed a 180nm 12v
impact wrench (£15 ebay) from a friend and it did the job perfectly.  I
could not find any tdc marks on the front of the engine, so wound the engine
to tdc on the flywheel,  put a paint mark on the dizzy-rotor arm, and one on
the cam belt-cam shaft sprocket. Disassembled and reassembled to these
marks. Started the car no problem, adjusted the timing to a smooth idle,
which was far too advanced, about 22 degrees btdc. Went back to 16 which it
was before. Idle was very lumpy, took it up to 18 btdc and drove it, no
knocking on standard unleaded (according to the fault codes anyway).  It
drives differently to how id imagined it, I expected to feel a surge of
power at 4000-4500 or there abouts. Instead in low gears it feels exactly as
before, until 5250, when accelerating it just keeps going at the same pace
until the rev cut!!! In higher gears accelerating from low speeds (ie 20mph
in 5th) is a bit painful. But generally I am very happy with the way it
performs.
So, a few questions....
Should I adjust my idle mixture?
Where are my timing marks??? There should be one on the cam sprocket, and
one on the harmonic dampener, but I cant find them!!!

Best Regards,
Alan Pritchard

Network Administrator
Mechanical Design Engineer
Seaeye Marine Ltd.
+44 (0)1329 289000

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