Finally someone in the right direction......ok i have a Q for anyone who KNOWS and isnt guessing.

I have reason to believe the cams on late model euro sec NON turbo 617s have a high speed cam.

I was told by my mercedes mentor back before he died that the euros had a high speed cam.

I believe this for one reason only. If you take say a 1984 euro 300d and swap the long block (NOT IP) with a us spec not turbo long block it will not have the same off the line power. I say this because i have seen and felt it with my own eyes and body.

Brand new rebuilt us spec 81' 617 into an 84' euro 300D.....the stock euro motor with 300k+ had WAY more power and speed then the rebuilt perfect compression US spec 81 did even with the same euro M pump.

Engine purrs super smooth and NO blow by. Valves adjusted and all.

Only thing i never checked side by side was the cam numbers and profile.

What do you guys think?

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