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Message: [QUOTE="TARM, post: 141473, member: 578"] Right but that is because we have to include the injector delays. Otherwise the actual window to correctly stay inside the bowl BTDC is a fixed number of degrees with a fixed SOI. The window of actual time changes with corisponding changes in rpms but not the actual degrees or SOI of the window if there is not any delay to account for. Only when you have to adjust for time other than when there is actual spray coming from the nozzle does it effect the degrees when looking at by degrees. This is done to make it easier to cunderstand I guess or maybe something with how the tuning tables are presented. Otherwise what you woulddo is compute that fixed window of degrees into ms based on the rpm and then add in the delays to that real ms inkection window giving you the total. If there was no delays to deal with I think it would be much easier to grasp. It would also make the table to hold at a specific SOI without a pcm adjustment more clear. It can be confusing to say the leastwhen you have a advancement table zero'd yet yourr osciliscope still shows a SOI degree change as rpms increase. That is until you realize that change us to account for the injector delay which is going to cause a advancement with rpms of SOI to keep that actual same degree point of spray at those rpms. Might have been nice to have delay separated or at least made clear what us going on rather than having to work it out as to the reason and correlation. I hope I have said all that correctly LOL [/QUOTE]

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