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etc means what cam profile as in what you really have, rpm range, cruise range, duration, calculated compression, size of the motor, type of transmission, final drive ratio, and tire size. All these play an important part in determining optimum stall speed. Stock is roughly 1800.Are you guessing on the compression like the lift or was it measured with the current heads on it, What do you mean maxes out the lifters? rough idle could be caused by incorrect timing, so having this information is important. When you were selecting a cam they typically give you a range of requirements to match all the pieces together.