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I re-ran the map 6 values listed above with better fuel. https://datazap.me/u/gryph8n/log-1710202479?log=0&data=1-4

looking like my map 2 is okay? What psi ramp up do you recommend? https://datazap.me/u/gryph8n/log-1710201307?log=0&data=1-4

Yes I’m finding out that fuel source is important. Just limited in what is available close to me. So for 5k+ on this map, maybe go to not more than 4.2psi and taper to 3.0 by 7k or just keep flat?

Running a different fuel source at high altitude. Had to adjust my boost pressure down. How do these logs look? What happened to my WGDC the first pull? Thanks https://datazap.me/u/gryph8n/log-1709770537?log=0&data=1-4

Yes I already have an Evolution Racewerks 200 cell downpipe but was wondering about Leviathan’s clam that “virtually all exhaust systems reduce down to 3.15” to connect with the factory Downpipe.” And whether that is solved with my 4.5” downpipe or needs a full exhaust to not limit flow?

Yes I already have an Evolution Racewerks 200 cell downpipe but was wondering about Leviathan’s clam that “virtually all exhaust systems reduce down to 3.15” to connect with the factory Downpipe.” And whether that is solved with my 4.5” downpipe or needs a full exhaust to not limit flow?

does your exhaust system fit a 2023 BMW M440i xdrive coupe?

on the first run, I increased psi at 3500 rpm to 3.7 instead of 3.6. But got boost pressure spike at the end of the curve but not on boost 2 curve. Second run, returned to 3.6 @3500 and the spike is gone. Third run, tried increasing psi at 4500rpm from 4.6 to 4.7 but again got pressure spike...

So boost is at chargepipe and boost 2 is at manifold. In theory boost 2 smooths spikes in pressure and is what “matters”. So the boost curve could be a little smoother by upping the psi a few points at lower rpms?…but pretty close to optimal now.

boost 2 looks to me to match up to pre-boost curve. How does looking at boost 2 vs boost help?

I went back and adjusted boost at 6500rpm from 3.6 up to 3.7 but got throttle correction, see graph with blue circle. That pressure spike at the end is an indication of? So I’m thinking that I’m optimized for higher rpm range. https://datazap.me/u/gryph8n/log-1709228529?log=0&data=1-4 the...

Help me understand what is happening here at 2800-3100rpm when the throttle drops way down before maxing out. Is that a function of the turbo spooling up to speed and building boost? What is happening with the engine at this time?

Throttle closures at 5000rpm. First graph before correcting duty bias. 2nd graph after correcting duty bias. ColonelAdama was spot on.

Here is an illustration of i3igpete’s astute observation in a screen shot, since logs won’t always be available in links for future use. Circled in blue. Happens right at 4940 rpms.

These were my settings for the runs before dropped timing. I posted it for future reference for readers. I will turn down duty bias at 6500 and 7000 from 62 down to 60. Thanks again.

https://datazap.me/u/gryph8n/log-1709165453?log=0&data=1-4 new logs with changes. Then tried two runs at the end without taper but appears that has dropped timing (not throttle)?

how do these settings look?

the concern of having the boost levels going too high at higher rpm and overshooting the target boost and having the ECU cut power. so my prior boost was at +4.1 psi @4500rpm-5000rpm with decrease at higher rpms. 5000 rpm = 4.1 psi 5500 = 3.7 6000 = 3.6 6500 = 3.0 7000 = 2.5 i3igpete you are...

So at 5000rpm and higher, I can keep boost levels the same and not taper off until 6500rpm? I had tapered due to concerns of overboost.