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Message: [QUOTE="TARM, post: 143214, member: 578"] Right that's sort of my point. As rpms grow even when you remove all the injector delay etc... as Carles stated you would still been increasing the BTDC SOI to account for the actual properties of the combustion event. Now as you have stated Matt, there is a 24 degree hard limit @ 3k rpm to hit the bowl. At 4k that limit maybe 28-30. But will we not at some rpm actually be hitting the actual physical static max degree you can fire the injector removing all the delay etc and no longer stay inside the bowl? This is why I asked about the static limit. I understand if i am starting to tread into info that has taken person individual work to gain and its not going to be freely released publically. In that case I am good. Prsonally I would never want the stress or responsibilty to ever tune someone elses truck. I think there arelready plenty of tuners out there. Buti still as you know like to understand how things work. Matt, Charles, or anyone that knows their info to be correct: Something I have been wondering and can not find any talk about when it comes to heui injectors or anything outside mechanical injector nozzles. Injectors when they fire creat a cone of spray. This cone is at a specific angle or degree. When you switch between say stock 7 holes and then edm 80%, edm eh 100%, edm 200%, edm eh 300% ,edm 400%, edm 600%, etc... is not the actual cone angle of spray pattern from the nozzle effected? Or are these adjusted as part of manf so they are all the same (I would think not but do not know). Obviously if the angle is changed this is going to effect the entire table of where you can or can not hit the bowl properly etc.. or is this all a nonfactor? [/QUOTE]