After 2 hours of browsing through half of the 248 "timing" threads that came up after a search and not finding my problem i give up 
Showed my car to a pro engine builder today and he is as confused as i am!
Car runs and idles fine, when i start it COLD, the timing light shows the timing at about 7-8 deg. As it warms up, the timing keeps advancing and by the time its fully warmed up, it sits at about 17 degrees (advance).
The question is, what would make the timing advance like that? My guess is that the ECU is compensating for something, but what?!?! It would make more sense for the timing to retard actually, since the RPM's are dropping as the engine warms up. All the marks on the cam gears, crank pulley and CPS are alligned properly. The only thing that might be worth mentioning is that the compression is SLIGHTLY higher, with about 0.1mm less in between the head and block. Pistons are the forged ROSS stock compression units. If anyone can answer why the timing keeps creeping up like that as the engine is warming up, i will be trully impressed! (lol)
Another question is about the dammage that can be caused by running at 17 deg at stock boost (for now). I know that advancing the timing increases the chances of detonation if the fuel is not up for the task. I also heard some mention of "piston dammage", not really sure what that means, but would the forged pistons be more resistant to any sort of "dammage" ?
Thanks a lot for reading.
Dennis
Showed my car to a pro engine builder today and he is as confused as i am!
Car runs and idles fine, when i start it COLD, the timing light shows the timing at about 7-8 deg. As it warms up, the timing keeps advancing and by the time its fully warmed up, it sits at about 17 degrees (advance).
The question is, what would make the timing advance like that? My guess is that the ECU is compensating for something, but what?!?! It would make more sense for the timing to retard actually, since the RPM's are dropping as the engine warms up. All the marks on the cam gears, crank pulley and CPS are alligned properly. The only thing that might be worth mentioning is that the compression is SLIGHTLY higher, with about 0.1mm less in between the head and block. Pistons are the forged ROSS stock compression units. If anyone can answer why the timing keeps creeping up like that as the engine is warming up, i will be trully impressed! (lol)
Another question is about the dammage that can be caused by running at 17 deg at stock boost (for now). I know that advancing the timing increases the chances of detonation if the fuel is not up for the task. I also heard some mention of "piston dammage", not really sure what that means, but would the forged pistons be more resistant to any sort of "dammage" ?
Thanks a lot for reading.
Dennis