Mhd not even near target boost

black335x · 08-25-2022, 06:36 PM

So target boost is 18.6 with 16 at redline. I'm quite far off and have no clue what the cause could be. 5k miles on 1step colder plugs and coils.

Any help is appreciated
Thanks!

Mods
ARM DP
CTS 7.5in Intercooler
ARM CP and BOV
MHD

https://datazap.me/u/black335x/log-1...mark=96-105-86

mfran615 · 08-25-2022, 07:34 PM

Vacuum mines, boost solenoids, CP connections, FMIC connections. Smoke test it

black335x · 08-25-2022, 07:38 PM

Quote:

Originally Posted by mfran615

Vacuum mines, boost solenoids, CP connections, FMIC connections. Smoke test it

I have checked all the connections. How can i test boost solenoids?

TSilver335i · 08-25-2022, 09:59 PM

Quote:

Originally Posted by black335x

So target boost is 18.6 with 16 at redline. I'm quite far off and have no clue what the cause could be. 5k miles on 1step colder plugs and coils.

Any help is appreciated
Thanks!

Mods
ARM DP
CTS 7.5in Intercooler
ARM CP and BOV
MHD

https://datazap.me/u/black335x/log-1...mark=96-105-86

Dont be scared to WOT

Some timing corrections though. Running enough E percentage?

black335x · 08-25-2022, 10:05 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

So target boost is 18.6 with 16 at redline. I'm quite far off and have no clue what the cause could be. 5k miles on 1step colder plugs and coils.

Any help is appreciated
Thanks!

Mods
ARM DP
CTS 7.5in Intercooler
ARM CP and BOV
MHD

https://datazap.me/u/black335x/log-1...mark=96-105-86

Dont be scared to WOT

I didn't even realize that i wasnt WOT. During the whole pull i had my foot down as far as i could go that's weird. i'll get a better log tomorrow and see

TSilver335i · 08-25-2022, 10:18 PM

Quote:

Originally Posted by black335x

I didn't even realize that i wasnt WOT. During the whole pull i had my foot down as far as i could go that's weird. i'll get a better log tomorrow and see

seems normal boost for stock turbos. you will start to see them drop off around 5000rp. 14-15psi at 6000 rpm is normal

black335x · 08-25-2022, 10:19 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

I didn't even realize that i wasnt WOT. During the whole pull i had my foot down as far as i could go that's weird. i'll get a better log tomorrow and see

seems normal boost for stock turbos. you will start to see them drop off around 5000rpm

seeing them around 14-15psi at 6000 rpm is normal

even on the stage 2+ e50 tune? because boost target was around 16 and i was at like 12

TSilver335i · 08-25-2022, 10:24 PM

Quote:

Originally Posted by black335x

even on the stage 2+ e50 tune? because boost target was around 16 and i was at like 12

Yes check out my v10 e50 log

https://datazap.me/u/formation/mhd-v...=0&data=3-4-19

black335x · 08-25-2022, 10:28 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

even on the stage 2+ e50 tune? because boost target was around 16 and i was at like 12

Yes check out my v10 e50 log

https://datazap.me/u/formation/mhd-v...38;data=3-4-19

I feel like 12psi at redline is super low. you are still at 14. i'm so lost

TSilver335i · 08-25-2022, 10:31 PM

Quote:

Originally Posted by black335x

I feel like 12psi at redline is super low. you are still at 14. i'm so lost

My log only goes to 6200rpm. check yours out in that area your 14 psi. + like i said yo need a WOT run

black335x · 08-26-2022, 05:07 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

I feel like 12psi at redline is super low. you are still at 14. i'm so lost

My log only goes to 6200rpm. check yours out in that area your 14 psi. + like i said yo need a WOT run

https://datazap.me/u/black335x/stage...&data=3-21

New run i just did. still missing targets by a good amount

TSilver335i · 08-26-2022, 06:44 PM

Quote:

Originally Posted by black335x

https://datazap.me/u/black335x/stage...og=0&data=3-21

New run i just did. still missing targets by a good amount

Link not working or set to private?

black335x · 08-26-2022, 08:56 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

https://datazap.me/u/black335x/stage...&data=3-21

New run i just did. still missing targets by a good amount

Link not working or set to private?

should be working now

TSilver335i · 08-26-2022, 09:12 PM

Quote:

Originally Posted by black335x

should be working now

Excellent Log! Really smoothed it out by going WOT with no timing corrections.

Since its mainly 2nd gear though you dont really get boost as high as you would in 3rd.

Seems like a bit of a leak.

black335x · 08-26-2022, 09:15 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

should be working now

Excellent Log! Really smoothed it out by going WOT with no timing corrections.

is it normal to be missing boost targets by that much?

TSilver335i · 08-26-2022, 10:33 PM

Quote:

Originally Posted by black335x

is it normal to be missing boost targets by that much?

My 3rd gear log posted earlier is a good example. Boost >5000rpm drops off is normal for stockers.

black335x · 08-26-2022, 10:40 PM

Quote:

Originally Posted by TSilver335i

Quote:

Originally Posted by black335x

is it normal to be missing boost targets by that much?

My 3rd gear log posted earlier is a good example. Boost >5000rpm drops off is normal for stockers.

Thanks for all the help!

witty · 08-27-2022, 01:27 AM

seems like a leak or something. Usually, a leak when ur boost target is about 1-2 psi under. The usual drop after 5000rpm is relevant and it happens on a lot of cars. (especially us ije0s version)

Heres my log

https://datazap.me/u/tochez/3-and-4t...=1&data=3-4-20

Same exact issue as yours (althought I still havent solve my problem yet)

My two guesses are
1) Turbos giving out, if your seeing a lot of oil on our inlet pipe for ur IC, ur turbos are likely the culprit
2) some sort of leak (possible boost solenoids) <-- thats the only thing I havent changed out, Ive done leak down tests and stuff and everything seems good,.

How much miles does ur car have?

black335x · 08-27-2022, 06:54 AM

Quote:

Originally Posted by sliver 335

seems like a leak or something. Usually, a leak when ur boost target is about 1-2 psi under. The usual drop after 5000rpm is relevant and it happens on a lot of cars. (especially us ije0s version)

Heres my log

https://datazap.me/u/tochez/3-and-4t...38;data=3-4-20

Same exact issue as yours (althought I still havent solve my problem yet)

My two guesses are
1) Turbos giving out, if your seeing a lot of oil on our inlet pipe for ur IC, ur turbos are likely the culprit
2) some sort of leak (possible boost solenoids) <-- thats the only thing I havent changed out, Ive done leak down tests and stuff and everything seems good,.

How much miles does ur car have?

83k miles.

witty · 09-07-2022, 09:16 PM

Quote:

Originally Posted by black335x

83k miles.

I dont know, maybe ur tmap sensor? Have you figured out your problem yet/

If its not your IC, inlet or outlet, then it has to be ur charge pipe.

black335x · 09-07-2022, 09:22 PM

I dont know, maybe ur tmap sensor? Have you figured out your problem yet/

If its not your IC, inlet or outlet, then it has to be ur charge pipe.[/QUOTE]

I guess it's normal for stock turbos to drop off like that. I checked all connections and did a smoke test so it's not a leak.

whyzee125 · 09-07-2022, 11:39 PM

Are your turbos original? Got any wastegate rattle? Vacuum lines are due and is cheap and easy to do, even if it turns out to be preventative. I don't know of a good way to test solenoids aside from process of elimination. If you're sure you're not leaking at IC/CP connections, I'd do vacuum lines next and then solenoids after that. If at that point it's still below and you're very sure about the past things, time to look at your turbos. Could be the wastegates getting tired. Eventually that will require replacement but adjusting the wastegates may buy you some time if that's the issue.

I wouldn't jump to that conclusion yet though, there are a LOT of simpler/cheaper things it can be.

08-25-2022, 06:36 PM	#1
black335x Enlisted Member 0 Rep 34 Posts Drives: 2010 335xi Join Date: Aug 2022 Location: Kansas iTrader: (0)	So target boost is 18.6 with 16 at redline. I'm quite far off and have no clue what the cause could be. 5k miles on 1step colder plugs and coils. Any help is appreciated Thanks! Mods ARM DP CTS 7.5in Intercooler ARM CP and BOV MHD https://datazap.me/u/black335x/log-1...mark=96-105-86
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08-25-2022, 07:34 PM	#2
mfran615 Private 11 Rep 65 Posts Drives: 2011 335is 6MT Join Date: Dec 2015 Location: OH iTrader: (0)	Vacuum mines, boost solenoids, CP connections, FMIC connections. Smoke test it
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08-27-2022, 01:27 AM	#18
witty Private First Class 16 Rep 197 Posts Drives: 2010 BMW 335i M-Sport Join Date: Apr 2021 Location: NJ iTrader: (0)	seems like a leak or something. Usually, a leak when ur boost target is about 1-2 psi under. The usual drop after 5000rpm is relevant and it happens on a lot of cars. (especially us ije0s version) Heres my log https://datazap.me/u/tochez/3-and-4t...=1&data=3-4-20 Same exact issue as yours (althought I still havent solve my problem yet) My two guesses are 1) Turbos giving out, if your seeing a lot of oil on our inlet pipe for ur IC, ur turbos are likely the culprit 2) some sort of leak (possible boost solenoids) <-- thats the only thing I havent changed out, Ive done leak down tests and stuff and everything seems good,. How much miles does ur car have? __________________ '10 354 E90 335i - Wedge Performance - 1K FMIC - ARM DP - Injen CAI - TD04L 19T Turbos - Stage 2+ LPFP
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09-07-2022, 09:22 PM	#21
black335x Enlisted Member 0 Rep 34 Posts Drives: 2010 335xi Join Date: Aug 2022 Location: Kansas iTrader: (0)	I dont know, maybe ur tmap sensor? Have you figured out your problem yet/ If its not your IC, inlet or outlet, then it has to be ur charge pipe.[/QUOTE] I guess it's normal for stock turbos to drop off like that. I checked all connections and did a smoke test so it's not a leak.
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09-07-2022, 11:39 PM	#22
whyzee125 Brigadier General 1691 Rep 3,652 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	Are your turbos original? Got any wastegate rattle? Vacuum lines are due and is cheap and easy to do, even if it turns out to be preventative. I don't know of a good way to test solenoids aside from process of elimination. If you're sure you're not leaking at IC/CP connections, I'd do vacuum lines next and then solenoids after that. If at that point it's still below and you're very sure about the past things, time to look at your turbos. Could be the wastegates getting tired. Eventually that will require replacement but adjusting the wastegates may buy you some time if that's the issue. I wouldn't jump to that conclusion yet though, there are a LOT of simpler/cheaper things it can be.
	Appreciate 0 Quote