I figured I’d share my experiences with using both tuners and which one, I think is best.

i have a 2011 MCS (N18) that I have already done some mods on which include Alta intake, 2.5” straight pipe exhaust from the downpipe back to 3.5” tip, larger intercooler, rear seat delete, carbon fiber rear strut brace and a uncorked scoop.

i ran a JB+ for a few months before selling it and what I noticed is the JB+ is easy to install but really only works when you really get on the throttle. I now have NM Engineering’s Power Module for the N18 and while the price difference between the two is only $50 the difference is substantial.

I ran it for 10 minutes on 3PSI but have since flipped the switches to 5PSI (running 91 octane). The Power Module doesn’t just work when you get on the throttle as I have noticed an increase in acceleration and blow off from the turbo at lower throttle positions along with the turbo whine kicking hitting at 1/2 throttle compared to full throttle while stock/JB+

I’ve had no issues with CEL or reduced power at all and the engine handles the 5PSI switch with no adverse effects (although I think my other mods may have something to do with that)

Overal I think the NM is worth the extra money as it does more than a JB+ and gives a bigger performance boost

I did read reviews on it before buying it and I was concerned with it causing issues with limp mode which is why I waited a few weeks (and was toying with the idea of getting a tune). I decided on the power module because my car has a 5yr/100k warranty and I don’t want to risk losing that with the tune.

I assumed (so far correctly) that with the mods I already have it could handle the extra boost which is correct because even though I only run 91 fuel (highest available here) it handles the 5PSI switch with no issues.