Im not sure what its called, but on my 616 4cylinder there is a small banjo bolt with a check ball valve with a small spring that limits the ammount of pressure that the lift pump allows into the injection pump. So i was doing some stuff and i had it off, i took the spring out and stretched it a small ammount and put everything back together, i have to say the results are astounding, gained alot more torque in the low end but its also a little harder to start.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.