SidecarFlip wrote:
be careful with tuners. Advancing the injection timing can do bad things to an engine under load and void the warranty (even if you pull the programmer). Any competent engine tech can easily ascertain if you had/have a tuner if the engine fails.
best mods are intake and exhaust related.
Advancing timing at low rpms can do bad things because it causes excess cylinder pressure. Advance timing at high rpm better for the engine. It took many years and many popped head gaskets for the tuners to figure this out back in the early days diesel tuning.
A diesels power is regulated by fuel so in order to add big power then more fuel is needed. Air intake/exhaust mods only get you so far and you will hit a brick wall in terms of power if more fuel is not added. Just like you could not get the power out of your truck that you did without altering fuel delivery in some way.
