Opel Forums - View Single Post - What to do if Your Head or Block is Milled? (was "what to do with a decked head?")

Washout · 12-10-2006

OK Guys I worked on this most of the day and here's where I ended up. Using Jeff's re-drilling of the cam gear I was able to move things around until I got the following readings. All these numbers are based on .050 valve lift.

Exhaust timing ended up open 44* BBDC and close 3* ATDC

Intake timing was 1* open BTDC and close 41* ABDC

The cam is an isky OR-66 and claims duration at .050 will be 228* although Bob pointed out it is more like 222* I made these reading with all valves adjusted to ensure that there was a good load on the timing chain to remove all slack. The head was snug but not torqued down. I repeated the checks three times for each valve with complete repeatability.

From these numbers am I correct in believing I have the cam accurately timed and is there any reason I would want to further advance the cam?

12-10-2006	#77 (permalink)
Washout Member Join Date: Sep 2003 Location: Ohio for now, but Texas is Home Posts: 337 Classified Rating: 0% (0) Logbook Entries: 4	OK Guys I worked on this most of the day and here's where I ended up. Using Jeff's re-drilling of the cam gear I was able to move things around until I got the following readings. All these numbers are based on .050 valve lift. Exhaust timing ended up open 44* BBDC and close 3* ATDC Intake timing was 1* open BTDC and close 41* ABDC The cam is an isky OR-66 and claims duration at .050 will be 228* although Bob pointed out it is more like 222* I made these reading with all valves adjusted to ensure that there was a good load on the timing chain to remove all slack. The head was snug but not torqued down. I repeated the checks three times for each valve with complete repeatability. From these numbers am I correct in believing I have the cam accurately timed and is there any reason I would want to further advance the cam?