Schrick Cam installation

[Huw Powell]

> Ok, Installed my schrick 272 at the weekend.....  I could not find
> any tdc marks on the front of the engine, so wound the engine to tdc
> on the flywheel

That's where it is, the ones on the front of the crank are not reliable
after the car has been used.

> put a paint mark on the dizzy-rotor arm, and one on the cam belt-cam
> shaft sprocket.

There is a mark on the *back* of the cam sprocket, that is supposed to
be lined up with the top of the cam cover gasket.

> 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).

"Stock" idle timing is 12 DBTDC - I would advise starting there and then
adjusting for "optimum" with your new cam.

> Should I adjust my idle mixture?

Probably a good idea, it's always good to check, anyway.

> Where are my timing marks???

See above...

> How does the ecu know where tdc is?

On KE3, it doesn't.  The idle timing is set at the factory at 12 BTDC, 
and a plate is riveted over the dist. nut so no one can mess it up.  The 
ECU plays with it from there.  If you move it, the ECU still does the 
same adv/ret things, but starting from your new "zero" point.


-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/