Can piggyback be used on top of ecu/dme flash?

[DuSh]

What I mean is if they are stackable? I was thinking piggyback can add boost on top of flash - thus making additional gains. However, I lack knowledge of how exactly piggyback works to definitely say that's doable
Anyone with more experience can confirm?

[MN2///M]

The real question is not if you can, but should you? To that question, I would say a resounding no.

Flashes and piggybacks are independently developed based on a known condition to provide a modified end state. Neither of which you would have unless you have very detailed knowledge of what each is modifying and the skills to evaluate the cumulative effect; it would be a very bad idea.

The Flash tunes modify the computer to a known end state that hopefully the developer has tested thoroughly. The piggy back tunes start with a known configuration; that being the stock tune and selectively modify to an end state that you again hope they have thoroughly tested.

[DuSh]

Originally Posted by MN2///M

The real question is not if you can, but should you? To that question, I would say a resounding no.

Flashes and piggybacks are independently developed based on a known condition to provide a modified end state. Neither of which you would have unless you have very detailed knowledge of what each is modifying and the skills to evaluate the cumulative effect; it would be a very bad idea.

The Flash tunes modify the computer to a known end state that hopefully the developer has tested thoroughly. The piggy back tunes start with a known configuration; that being the stock tune and selectively modify to an end state that you again hope they have thoroughly tested.

I agree with everything you say. It's just I remember reading somewhere about jb4 working on top of backend flash tune in tandem and this combo was offered by jb4 developer in the first place. I don't know what the reasoning was, but if I remember correctly jb4 was set as a dedicated boost control module while DME/ECU was doing the rest afr etc. - basically the end result was better than just flash or jb4 alone. Again I'm not an expert in this and I was hoping someone technically more inclined can chime in and explain exactly why it's a good or bad idea

[FSociety]

Great thread, lots of info on F30 on this topic.
With Bootmod3 we have overcome the need of any piggyback or jb4 in the last year.