Ignition Timing - Page 2

missfire · 10-10-17, 07:04 PM

Quote:

Originally Posted by quattrodave

Not sure about the NG engine but on my 7A there are 2 marks on the flywheel a 0 for TDC and a 12 for BTDC (TDC = top dead centre, BTDC = before top dead centre) the engine should be timed with a strobe to the BTDC mark, effectively firing 12 degrees before it gets to TDC (on the 7A) thats why when you move your distributor about 10mm it runs better as you are getting closer to the correct BTDC setting.

If you locate the 0 mark in the transmission housing try moving the engine a few mm anticlockwise using the front crankshaft bolt to locate the other BTDC mark which sounds like its a 15 on your engine not a 12 as on my 7A.

Solved by the sound of it, good stuff.

pastit · 10-10-17, 07:09 PM

Quote:

Originally Posted by missfire

These ones -

https://www.ebay.co.uk/sch/i.html?_o...XC788&_sacat=0

XC788, they fit all the five pots.

When I put my model in the drop down it says does not fit ? Should I ignore that ?

missfire · 10-10-17, 07:27 PM

Yep, they're all the same, here is a listing from the same seller, for an NG, same parts. A case of computer says no!

http://www.ebay.co.uk/itm/QUINTON-HA...8AAOSwAO9ZPxis

mikes2 · 11-10-17, 12:28 PM

you can only set it with the engine running

11-10-17, 12:28 PM	#14
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	you can only set it with the engine running __________________ 1991 90 quattro 20v sport 1991 90 quattro

10-10-17, 07:27 PM	#13
missfire making wooden things Classic Audi Club Member Join Date: Dec 2009 Location: cow land Posts: 8,154	Yep, they're all the same, here is a listing from the same seller, for an NG, same parts. A case of computer says no! http://www.ebay.co.uk/itm/QUINTON-HA...8AAOSwAO9ZPxis