4D56T mods

[mudbugga]

Found this on the mighty www......though it interesting

remove the top of the boost compestation device ( top of the diesel pump) and you will find a diaphram, mark the original position then rotate it 90degrees clock wise

if you brave you can lift out the diaphram (noting position) and you will find a star wheel, turn this 180degrees clock wise then refit the diaphram/pin ass to the new 90deg position had earlier.

rotating the diaphram will increase the fueling under boost a lot ( i have mine turned 45deg)

rotating the star wheel will lower the tension of the diaphram and let the boost fueling increase come in earlier

[Dak]

The heads on those engines are fragile enough without doing that. Be carefull you don't end up with a cracked one.

[motorhead]

Mine just blew a head gasket thinking about power increase