Mind sharing the details on the customized approach? Or are you using the stock tables with axis edits?
Stock tables with axis edits for now to see how that works. I am open to suggestions on how to improve that as well.
Mind sharing the details on the customized approach? Or are you using the stock tables with axis edits?
Those tables still require the model of the exhaust gas flow over the turbine is accurate and with catless downpipes, exhaust changes, aftermarket turbos, etc this is not the case.
Do you have access to EWG, or even M2 MEVD172G maps? The compressor map is setup quite differently compared to N55 PWG cars.
Stock tables with axis edits for now to see how that works. I am open to suggestions on how to improve that as well.
Those tables still require the model of the exhaust gas flow over the turbine is accurate and with catless downpipes, exhaust changes, aftermarket turbos, etc this is not the case.
With PID control we should be able to reduce the boost spikes we see post shift, going WOT and downshifting, high gear low rpm WOT, etc. These scenarios are hard to tune around when just using commanded WG.
That's because the EWG compressor wheel is significantly larger. I guess BMW just inputted all the new data for the new turbo.
Jake has looked at it, we briefly discussed whether to present the data in some way (from ignition learning and fuel trims), but he found it has multiple dimensions. Maybe it can be reduced to load vs RPM to display usefully.
Please share your tune!Figured I'd post a little teaser.
With some new tables defined I've been able to push the boost and ethanol content that it is possible to run on N55. E54 and 22psi on DI only. No PI. No Meth. No supplemental fueling. VS Stage 2.5 DW400 LPFP and a healthy OEM HPFP. Still have some more room to go I think too. Needs some more testing to smooth out rail pressure at high RPM a bit. As you can see it is oscillating a bit. Unfortunately, I'm out of town this week so probably won't get a chance until this weekend.
View attachment 12575
Figured I'd post a little teaser.
With some new tables defined I've been able to push the boost and ethanol content that it is possible to run on N55. E54 and 22psi on DI only. No PI. No Meth. No supplemental fueling. VS Stage 2.5 DW400 LPFP and a healthy OEM HPFP. Still have some more room to go I think too. Needs some more testing to smooth out rail pressure at high RPM a bit. As you can see it is oscillating a bit. Unfortunately, I'm out of town this week so probably won't get a chance until this weekend.
Are we also to conclude that the VS Stage 2.5 DW400 LPFP is an important mod here for keeping your rail pressure nearly flat? What other mods do you have and what TunerPro secret tables / which XDF did you change? Thanks in advance.Figured I'd post a little teaser.
With some new tables defined I've been able to push the boost and ethanol content that it is possible to run on N55. E54 and 22psi on DI only. No PI. No Meth. No supplemental fueling. VS Stage 2.5 DW400 LPFP and a healthy OEM HPFP. Still have some more room to go I think too. Needs some more testing to smooth out rail pressure at high RPM a bit. As you can see it is oscillating a bit. Unfortunately, I'm out of town this week so probably won't get a chance until this weekend.
View attachment 12575
Please share your tune!
Take it easy lol, it's mostly getting the late E on par with the N54 (same hpfp) from a calibration perspective. There's not nearly as much improvement on the N54 side. BMW artificially limited the max output of the HPFP on late E N55 vs. N54.
it sounds like you knew the early N55 (2011 and early 2012) hpfp had an artificial cap for a long time. what are your thoughts on why the tables to get us on par with the N54 calibration are not part of the xdf available to the public? is someone holding out on us? I have been scratching my head for a long time trying to understand why I can barely run e30 and I see n54s run e50 and more power. without Steve sharing the work that he is doing, I would never know this was possible.
Easy there buddy. I just found out yesterday when I talked to him. I have yet to look at anything N55 personally, as I am too busy with N54.
Tough crowd.
Are we also to conclude that the VS Stage 2.5 DW400 LPFP is an important mod here for keeping your rail pressure nearly flat? What other mods do you have and what TunerPro secret tables / which XDF did you change? Thanks in advance.