[witty]

I've had this issue for a while now, but I've exhausted all of my options and am genuinely confused.

Things I've tacked:

Adjusted wastegate arm
smoke tested/pressure tested to 25 psi
no codes

mods

afe intake
bms inlet
wanger tuning evo 3 fmic
vrsf chargepipe
vrsf downpipe
vtt stage 1 turbo
m2 diverter valve

on bm3 ots 2H 93 Map

Two 4th Gear Logs:

https://datazap.me/u/tochez/log-1714718776?log=0&data=6
https://datazap.me/u/tochez/log-1714718785?log=0&data=6


From the logs, I can see my wdgc is not high.
my hpfp and lpfp are good
afr is good
I am hitting some weird ignition issues (either fuel or need to reset adaptions due to adjusting wastegate)
Im not sure why but boost hits, goes down, comes back up, and then its a steady decline down.

At this point I feel like its a tune issue, but if anyone can chime in, that would be great.

[witty]

anybody?

[Wires]

Not an expert tuning the BMW platform, but APR's look really rich for direct injection. Are you running methanol with this setup?

On straight gasoline, the B58 runs close to stoic (14.7:1) (yeh, sounds scary lean) vs the typical 12-12.5:1 for power like you are seeing.

Dropping aside, eating popcorn until those that spend more time tuning this platform chime in.

[witty]

Originally Posted by Wires

Not an expert tuning the BMW platform, but APR's look really rich for direct injection. Are you running methanol with this setup?

On straight gasoline, the B58 runs close to stoic (14.7:1) (yeh, sounds scary lean) vs the typical 12-12.5:1 for power like you are seeing.

Dropping aside, eating popcorn until those that spend more time tuning this platform chime in.

I'm not too sure but I'm n55 and usually the afr is about 12.5 on wot.

[Wires]

Are you running the flex fuel kit? What type of fuel are you using?

Have you tried dropping back to their OTS 91 maps? Maybe it's a fuel quality issue.

[Orion4]

Have you tried resetting to baseline to see if it clears up?

[witty]

Originally Posted by Wires

Are you running the flex fuel kit? What type of fuel are you using?

Have you tried dropping back to their OTS 91 maps? Maybe it's a fuel quality issue.

I'm running 93 oct, I'm east coast so they only have 93. No flex fuel kit.

[witty]

Originally Posted by Orion4

Have you tried resetting to baseline to see if it clears up?

if you mean resetting adaptation it helped with the timing corrections, but boost is still an issue.

[Wires]

Originally Posted by witty

I'm running 93 oct, I'm east coast so they only have 93. No flex fuel kit.

I'd still try 91 octane maps. You can go lower with no issues, going higher than the maps for the fuel gets you knock retard.

[witty]

Originally Posted by Wires

I'd still try 91 octane maps. You can go lower with no issues, going higher than the maps for the fuel gets you knock retard.

here's another log, it seems like the psi is holding better than before after I had reset the log, it also seems like bm3 is asking for more boost all a sudden which I don't understand why.

https://datazap.me/u/tochez/log-1715...log=0&data=4-6

[Wires]

The boost at the end is due to the load target change when you shifted gears.

It is odd that it can exceed the boost level before that point, yet it slowly drops below the target pressure up to the gear change.