wow, the non turbo block has the oil squirters! thats a great thing, but why? Let us know what you end up doing for fuel, thats the key, other wise you are not making much more power. You might not be looking for big power, but your turbo sure suggests you are! I understand what you mean about the split pulse manifold, I have used that method for years on non M/B gas engines.

The oil squirters are necessary for keeping the piston temperature under control. If the piston temp gets too high cylinder scuffing, increased ring wear, increased blow by, etc occur. On the NA 606, the oil squirters simply squirt oil to the underside of a "normal" diesel piston. On the turbo 606 the oil is squirted into a "cooling galley" (AKA chamber) inside the piston. The oil is sloshed around by the movement of the piston, which increases the heat transfer into the oil.

Long story short, the NA 606 has squirters, but the turbo 606 has squirters and pistons with oil galleys.

I think the NA has weaker rods as well... I'm sure there are other things, but all I know about are the oil squirters.

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John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

Yeah the na606 has the weaker rods and pistons. I think the hp goals should be safe for this motor the oil jets help not a big issue as long as you don't do long hill pulls . Also I might look into putting a small shot of propane on it once the stock pump is turned up sort of a kick in the butt to get it spooling faster.