What I am to understand is that the custom tunes go much much more in depth than a hand held one. You can change a lot more parameters and dial the engine better.

 

That pretty much sums it up.

 

Anyone who knows anything about diesels know that a good tune is a custom tune loaded through EFI live. Edge and stuff like that are still garbage when it comes to the diesel game.

 

Thats true. But people get the wrong idea because you can still get 150+hp with an off the shelf tuner. Diesels are easier to make power. All those programmers do are reroute the fuel system and change the timing a little. Basically dumping all the fuel into it that a stock turbo can handle. Which they do a **** poor job of. Thats why you see them blowing so much smoke with just a tuner. Its not efficient but still adds power. Gas engines are totally different in the amount of power that comes out of a tune.