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I'm specifically looking at doing a 2.8 engine. I have a 3.6 in a car right now. I really just want to see if I can make something that revs up a bit better than stock with used parts that are easily available. I think it could be fun to mill and port the head a little and stick the biggest "stock" cams in it.
Both the cams can't be reverse rotation. The m120 spins the same way as the m104. It would make sense that the right side would use similar if not the same cams. A reason I think they may have a different pattern is the m120 has the twice the displacement so it doesn't need as much help making low end tourque so maybe there are cams that favor rpm or mid range power. That said the 6 liter is said to be developed from a m104.98x. I wonder if that's a coincidence or Mercedes saved development costs buy basing the 6L M120 head design on a standard M104 and just used the same cams.
duxthe1, how did you get the exhaust cam on the intake side? Aren't the base circles different diameters? Also I measured a few cams I have and the intake from a M104.98x seems to have a lot more lift than the M104.99x cams. Seems like paring that intake with a later exhaust cam in the late head would be a good combo if M120 is no different.
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