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C27 firing angles?

Helllo to everyone and thanks for any help in advance...this is my first time on this board!


Can anyone tell me the firing angles for a C27?  Looking at the valve lash information it looks like the 1st and 2nd cyclinders in the firing order fire at the same that true?


I am setting up our detonation sensing equipment and I need to know the firing angles to narrow down where the module looks for detonation.