Here is the GT2559v on the mercedes diesel.

http://vwdiesel.net/phpBB/viewtopic....asc&highlight=

The driveability factor is phenomenal. Generally boost goes up as fast as you can press the pedal down. With diesels its all about air, fuel and EGT. These will flow more than enough for the OM617 3 liter diesel and run ~20 psi. Most of those with the swap have not touched the fuel. Others have been tinkering around with the fuel.