Originally Posted by
Hemituna
Until recently, I would have agreed totally with the above comments.
But of late, I have found the latest vehicles (2014/15/16) work better with the NN on.
The NN is so interlaced with so many functions, that turning it off causes more drivability issues than it solves.
I've had a few battles recently getting 15 and later year models to drive as nice as I want.
Eg. Tuned a 2015 Whippled Jeep SRT with NN off. Made great power, drove good, but had a couple of drivability niggles that couldn't get on top of.
Spent days and days fiddling and don't get me wrong, the thing went good, most would be more than happy.
But I'm a stickler for perfect manners and just couldn't quite get it spot on.
So gave in and started tune again with NN on. Within just a couple of hours it was sensational, has never driven better, trans is buttery smooth but shifts solid, engine is super responsive and has perfect start/idle, cruise, transients, pedal feel with no drivability niggles at all.
I have redone a couple of other 14+ tunes now that were frustrating me also and have had the same result.
So maybe don't toss the NN out just yet, even on more modded and boosted cars.