Cary I'm normally lock and step with you and all things tuning. And you're are correct the N55 and S55 are different motors. But they're far more similar tuning wise being they share the same DME than they are mechanically (which is a good thing as the S55 is far more fortified)
Let's be "real" here, the MAIN reason we haven't seen a single turbo kit here is because there wasn't an accessible DME tuning solution for it. Well that has changed, with PTF's BM3 you can make more than enough changes necessary make a properly tuned single turbo. Finding the proper area to changing the EWG mapping within the DME itself or doing a simpler external piggyback solution for that is no hurdle for the tuner whom literally engineered the whole platform of the BM3 lol. We now have an excellent (and cost effective) solution to DME tuning. One would have to be a moron to go full Motec standalone ($10+K with tons more problems beyond that getting it to work with everything else on our cars) over giving the BM3 a crack at it. Which costs peanuts!! (relatively speaking)
We had/have simple direct bolt on turbo options for this brand new platform and it was CHEAP. To build, so good margins for the vendors, and buy* So accessible to many owners.
Things have changed. These direct stock location bolt on turbos, ALL OF THEM, clearly run out of gas up top. Any moron who's ever tuned various turbo platforms can see that just from the dyno charts. Furthermore making 700++RW Torque as low as 4K rpm (when trying to push stock frame turbos) dropping to ~525RWT by redline is garbage. You have extreme cylinder pressures and forces on the rods down in low rpms (where the chassis can't even use it!) and then the small turbines (which ARE limited by the physical size of the stock housing, sorry nothing you can do about this but junk them) start choking off the required CFM's to *maintain* the torque to redline. <--- a proper sized single would allow you to still make your strong torque down low (maybe dail it down to ~650RWTorque) at ~4.5rpms, keeping the stock-block very happy, while maintain 650rwtorque to 7.5rpms! Do the math, that's *well over* 800RWHP while exterting less stressful forces on the bottom end on these motors than 700whp on stock framed baby snail upgrades.
If THAT's not more than worth the reason to invest the time to move past these stock framed turbos then I don't know what is lol..
