not sure if this should be under turbo or not. but im curious if theres a basically universal equation to find out what crank angle degree youll have peak pressure. not sure how to word it, say if your spark lights at 17 degree btdc when should it end (peak pressure) ( finished burning)?? aftd. im sure octane rating and compression/boost are dependant also. hate math but think it would be a good thing to learn. thanks