BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST - View Single Post

sigterm2.0 · 02-18-2024, 01:12 PM

Well, I apologize for not getting these sooner. Some things came up while I was at the Super Bowl rally in KC (as I am sure you've heard). Anyway...

Here are two pulls from today. Hope these are cleaner for everyone. I removed a few of the channels that were being logged (basically went by kern417's post about logs and suggested channels).

Stage 2 91 oct (3rd gear)
https://www.bootmod3.net/log?id=65d2...f7375a14155528

Stage 2 91 oct (4th gear)
https://www.bootmod3.net/log?id=65d2...f2c967f9aa527f

Yeah, this is taking a lot to accept from my dinosaur days, however, these logs seem to be more in line with what I would expect from boosted cars. However, boost falls off 8psi over the rpm band, and when looking at the "Boost target" actual boost is following the target pretty well... Is this normal for this map? BM3 tuners bled off boost as rpm increased or am I misinterpreting this info? Also seems like there is a 2-4deg timing retard to correct ...something? There is no knock, and AFRs look sweet (even for me!

).

Any help interpreting these would be great, thanks for putting up with me and this learning curve!

This tank is almost empty so I'm going to put some E30 back in, and try that map again... Stay tuned!

———-

OK... I'm back with E30 logs. Keep in mind that my clutch can't hold the E30 tune well but this is way better than what I had before. AFRs more in-line with what I'm used to seeing here too... I still am feeling sketch about the part throttle, but you guys have given me a little more confidence about it.

Stage 2+ E30 (3rd Gear)
https://www.bootmod3.net/log?id=65d2...f7fd189d7dd550

Stage 2+ E30 (4th Gear, little clutch slip at 3300rpm, and 3700rpm)
https://www.bootmod3.net/log?id=65d2...f7375a14156014

3rd gear E30 pull is the cleanest.. Looking at boost it fades about 2psi or or as RPMs build, but the difference here is that it deviates from the target boost line line by that 2psi. The big thing I see this time is the timing correction. There is a 7-8 deg timing retard over the rpm band!!! Thinking my plugs or coils... any thoughts?

02-18-2024, 01:12 PM	#15
sigterm2.0 Private 30 Rep 79 Posts Drives: BMW 340i Join Date: Jan 2024 Location: Kansas iTrader: (0)	Well, I apologize for not getting these sooner. Some things came up while I was at the Super Bowl rally in KC (as I am sure you've heard). Anyway... Here are two pulls from today. Hope these are cleaner for everyone. I removed a few of the channels that were being logged (basically went by kern417's post about logs and suggested channels). Stage 2 91 oct (3rd gear) https://www.bootmod3.net/log?id=65d2...f7375a14155528 Stage 2 91 oct (4th gear) https://www.bootmod3.net/log?id=65d2...f2c967f9aa527f Yeah, this is taking a lot to accept from my dinosaur days, however, these logs seem to be more in line with what I would expect from boosted cars. However, boost falls off 8psi over the rpm band, and when looking at the "Boost target" actual boost is following the target pretty well... Is this normal for this map? BM3 tuners bled off boost as rpm increased or am I misinterpreting this info? Also seems like there is a 2-4deg timing retard to correct ...something? There is no knock, and AFRs look sweet (even for me! ). Any help interpreting these would be great, thanks for putting up with me and this learning curve! This tank is almost empty so I'm going to put some E30 back in, and try that map again... Stay tuned! ———- OK... I'm back with E30 logs. Keep in mind that my clutch can't hold the E30 tune well but this is way better than what I had before. AFRs more in-line with what I'm used to seeing here too... I still am feeling sketch about the part throttle, but you guys have given me a little more confidence about it. Stage 2+ E30 (3rd Gear) https://www.bootmod3.net/log?id=65d2...f7fd189d7dd550 Stage 2+ E30 (4th Gear, little clutch slip at 3300rpm, and 3700rpm) https://www.bootmod3.net/log?id=65d2...f7375a14156014 3rd gear E30 pull is the cleanest.. Looking at boost it fades about 2psi or or as RPMs build, but the difference here is that it deviates from the target boost line line by that 2psi. The big thing I see this time is the timing correction. There is a 7-8 deg timing retard over the rpm band!!! Thinking my plugs or coils... any thoughts? Last edited by sigterm2.0; 02-18-2024 at 07:29 PM..
	Appreciate 0 Quote