flipski Posted September 12, 2018 Report Share Posted September 12, 2018 my 2003 Z has 3 marks on the pulley, 2 of them are painted and 1 unpainted. The unpainted one is TDC and I thought the painted ones are 10 and 15degree BTDC. When running the timing calibration I end up with 2 offsets depending of the mark I choose. At TDC , I need -2 offset but I need 4 for 10deg. That's a 6 degree difference. Are my triggers screwed ? or I assumed wrong and the painted mark on the pulley are 15 and 20degrees ? The FSM only shows the mark at TDC and does not make any reference to the other 2. Thanks. Quote Link to comment Share on other sites More sharing options...
Leiden Posted September 12, 2018 Report Share Posted September 12, 2018 Lock your timing at 0deg and adjust the trigger offset until your are reading on the TDC mark. That way you can be certain your on the right track rather than guessing what the painted marks might represent. Also adjust ignition delay so that when you hold the revs up the timing doesn't wander off the mark. Quote Link to comment Share on other sites More sharing options...
flipski Posted September 12, 2018 Author Report Share Posted September 12, 2018 3 minutes ago, Leiden said: Lock your timing at 0deg and adjust the trigger offset until your are reading on the TDC mark. That way you can be certain your on the right track rather than guessing what the painted marks might represent. Also adjust ignition delay so that when you hold the revs up the timing doesn't wander off the mark. I did this ^. But I was just curious about the other 2 marks.Thank you. Quote Link to comment Share on other sites More sharing options...
Leiden Posted September 12, 2018 Report Share Posted September 12, 2018 You could manually enter 15 or 20 in the timing table and see where the marks line up if you were curious. How did you measure the timing? Loop wire or ignition lead between the coil and plug Quote Link to comment Share on other sites More sharing options...
flipski Posted September 12, 2018 Author Report Share Posted September 12, 2018 11 hours ago, Leiden said: How did you measure the timing? Loop wire or ignition lead between the coil and plug I put a lead between the coil and the plug. just wanted to grab the latency of the coil too. but taking it from the wire to the coil gives me very close readings too. it is almost like the coil have a very small latency. Quote Link to comment Share on other sites More sharing options...
Leiden Posted September 14, 2018 Report Share Posted September 14, 2018 Sounds like you did it properly. I've checked both ways and find the loop wire can give off readings compared to running a lead from the coil to the plug Quote Link to comment Share on other sites More sharing options...
flipski Posted September 27, 2018 Author Report Share Posted September 27, 2018 On 9/14/2018 at 9:19 AM, Leiden said: Sounds like you did it properly. I think I did. First Dyno session results come up to 247whp/232ft.lbs on a SAE Corrected dynojet. I am pretty happy as I am just right at OEM outputs now but I am gaining a more linear throttle response down low which was my first goal. Quote Link to comment Share on other sites More sharing options...
AbbeyMS Posted September 29, 2018 Report Share Posted September 29, 2018 see attached picture for VQ timing marks. Line furthest to the left is TDC. Quote Link to comment Share on other sites More sharing options...
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