Modern, electronically controlled injection systems can(and do) do multiple injections for each power stroke. Our mechanical systems can not.

From what I have read and learned injectors seem to be good for at least 300hp on the 617 engines. injection pumps need mods (bigger elements)to make that, and a differant turbo.

There is a good thread about pc modification, this is next on my list, and may well be followed by bigger elements.

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1977 240D turbo