Timing All Over The Place?

[mosquitocoils]

Hi guys.

Just started using my ECUtalk cable and some of the software... have sussed out a few things already. I'm more curious about my timing. I know timing is meant to be 15 BTDC on my R33 GTST S1.... have a look at the picture (from calumsult) and see if you can tell me why my timing is going all over the place? I know it's a bit of a vague question, but any tips would be appreciated.

I did search, but just got more confused by different opinions, so I thought I'd post my pic and have advice that's relevant to my situation. Thanks for any help!

Ravi

Edited September 11, 2009 by mosquitocoils

[Moodles2]

Consult software doesn't know and can't know the base timing. What you see here in the software is the ECU varying the ignition timing based on engine load/revs

[mad082]

you don't have the car locked into base idle mode. this locks the base timing at 15 degrees in the ecu. when i say that it locks it at 15 degees in the ecu, i mean that what the ecu thinks is 15 degrees. so if you then go and give the CAS a good twist, the ecu will still think it is 15 degrees even though the actual timing may be 25 degrees.

when not in base idle mode the timing will fluctuate all over the place as the car controls the idle. and the more eratic the idle (even if the idle sounds pretty smooth it can still be eratic because the ecu is working hard to keep it smooth) the more the timing will fluctuate.

[mosquitocoils]

Oooh ok. Thanks for the info, I was thinking that was the case... but is that true that I can't use software to read my base timing? How do I find out my base timing then?

As far as changing my base timing, am I right that I have to physically get in there with a timing light and compare with the notches etc? Or is there a way to simply do it through software?

[mosquitocoils]

Hey guys, just thought I'd share what I've found, and don't believe I found it earlier. There's another thread in this section that's been updated very recently, discussing the exact same thing. Not sure why I didn't see it before!

http://www.skylinesaustralia.com/forums/Ch...;hl=base+timing