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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > MHD N55 E-Series - general discussion



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      07-02-2020, 04:03 PM   #8603
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Quote:
Originally Posted by fmarsjr View Post
Would appreciate some feedback on this. From what I see, I am struggling to hit boost targets, wgdc also high and several timing corrections.

I ordered a new boost solenoid, silicone vacuum lines, and will do a boost leak test. Any other suggestions would be helpful!

https://datazap.me/u/fmarsjr/3rd-gea...og=0&data=3-13
It looks pretty good other than the timing, which you could probably fix with better gas or backing one octane level down on the tune. Also, I think that when the car starts pulling timing, it starts limiting load, so you may get more boost if you have less timing. Someone correct me if i am wrong.

When I look at the shape of the curve from the WGDC% and MAF g/s, they roughly match. So basically, as the car needs more air, the wgdc it is requesting is sufficient to provide it, until high rpm, but hey "small turbo".

It seems like it is pretty typical to see the difference in MAF g/s and maf req. wgdc% grow as the RPMs rise. The small turbo has a hard time keeping up, but maybe a weak boost solenoid is really what isn't keeping up. From what I understand these tunes are meant to have an unattainable load/boost request, meaning that you actually should be just behind the requested load and boost throughout the pull. Let us know how much the boost solenoid improves things. It would be nice to see how much of this is the design of the tune, the small turbo, or a bunch of us just having oldish boost solenoids.
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      07-02-2020, 07:07 PM   #8604
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Since we get soo many questions about timing corrections. ( How not to damage your engine)

**HOW TO 'FIX/ALLEVIATE' TIMING CORRECTIONS **

Order from most effective to least.

- Increase Octane ( Higher octane gas, Ethanol, Methanol).
- Reduce IAT ( Bigger Intercooler, Water Injection, ) , Note that air intakes do nothing here.
- Increase volumetric efficiency. (Downpipe). This point also ties in with another factor, When you decide to fully load the engine in terms of RPM. If you load at low RPM (lugging/high load) the chance of 'timing corrections' ( knock) is higher. If you go WOT at higher RPMs the timing should be less. This has to do with the amount of time that a 'bad' knock condition has to develop. The lower the rpms the more chance of it developing. Hence its importance to move air/fuel in and out fast.
- Reduce Boost ( Not a desired option for people but usually a necessary one sometimes.
- Spark Plug heat ( Cold range spark plugs)

- Running Rich AFR ( Tune variability and not an option to the users)

- Valve Timing ( Also ties in to how long you leave a knock condition to brew, not an option to users)
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      07-03-2020, 09:04 PM   #8605
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Does my WGDC seem too low?

My car seems to exceed target boost down low, but up top only holds 9.6psi.
meanwhile the WGDC is sitting at around 53% and this seems to go a lot higher on other peoples maps.

https://datazap.me/u/charlesb/mhd-st...a=3-4-13-15-18
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      07-03-2020, 10:25 PM   #8606
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
The boost difference when the rpm get high is quite noticeable, I would say it's more than what is usually seen on N55 OTS maps. Maybe a small leak indeed.

As for corrections, this seems like a fueling issue. Can you provide a log of a 91 ACN map? What coils and plugs you running on.

At around 2800-3500 rpms WOT I would get a brief fluttering sound and stuttering sensation that goes away as RPMs increase. Was worse on the 2+ 93 and 91 files so I backed it down to the 2+ 91ACN file. Didn't occur on the 1+ 93 file.

Mods: ER charge-pipe, 5" FMIC, VRSF Downpipe. New NGK plugs. BMW OE coils. Shell V-power 93. Bottle of Chevron Techron every couple tanks. Iím the second owner of the car but have had it for 5+ years. Itís in very good shape and only has 64k miles.


Two pulls in 3rd gear

https://datazap.me/u/carguy/log-1574...=0&data=3-5-11

https://datazap.me/u/carguy/log-1574...og=2&data=3-11


One pull in 4th gear

https://datazap.me/u/carguy/log-1574...og=1&data=3-11

Here's a log with the 91ACN map after resetting adaptations.

https://datazap.me/u/carguy/log-1574...24-25-26-27-28

The only variable between any of these logs is the tune. Everything else is unchanged.

FYI this is the most recent set of logs (3 attached) with the custom map.

https://datazap.me/u/carguy/custom-f...og=0&data=4-19
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      07-04-2020, 02:39 PM   #8607
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Im having trouble with my car, when i start it, it sometimes bogs and turns bsck off, its a 2011 335xi 6mt. The other day i couldnt go wot because it would bog and stutter.

How can i see HPFP and LPFP values on mhd?

I attached a log incase anyone wants to give it a quick look.

https://datazap.me/u/dhillon92/diagnostic?log=0&data=3-12
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      07-04-2020, 02:46 PM   #8608
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Quote:
Originally Posted by Dhillon92 View Post
Im having trouble with my car, when i start it, it sometimes bogs and turns bsck off, its a 2011 335xi 6mt. The other day i couldnt go wot because it would bog and stutter.

How can i see HPFP and LPFP values on mhd?

I attached a log incase anyone wants to give it a quick look.

https://datazap.me/u/dhillon92/diagn...og=0&data=3-12
Rail Pressure Mean is the HPFP pressure data. It seems to be pretty jumpy in your case when I compare it to mine, but that is most likely due to the manual transmission.

It does not go under critical value of 1400 PSI at WOT.
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Last edited by TheGoodTheBadTheUgly; 07-04-2020 at 03:26 PM..
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      07-05-2020, 09:59 PM   #8609
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Can someone take a look at my log?

I’m getting some hiccups on WOT, from logs I see it’s throttle closure. Looks like I’m over boosting slightly (it's actually right when load meets required load) and it’s cutting throttle. These logs are with DTC/DSC fully off.

Car is a 2011 335i w/ automatic. Catless DP, Forge intercooler, new spark plugs at .025”, was told ignition coils are newer but replacing soon. HPFP was bad but replaced with a used but known good pump.

Could it be a boost leak or bad boost solenoid?
Just took this log tonight,
https://datazap.me/u/noahsteger/log-...=0&data=4-5-17



Here’s another log from last week showing throttle closure,
https://datazap.me/u/noahsteger/log-...og=0&data=4-17
This one was done right before and shows no closure,
https://datazap.me/u/noahsteger/log-...0&data=4-17-19

Last edited by noah.s; 07-05-2020 at 10:35 PM..
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      07-06-2020, 08:14 PM   #8610
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Took two new logs today (use the dropdown in log) and these timing corrections really aren't sitting well with me.

For reference I am NH and run only Shell or Exxon 93 fuel. I started off with the 93 tune then backed off to the 91, then the 91ACN. Then Twisted wrote a custom file essentially detuning the 91ACN. I can't imagine our gas is this bad and I've filled up at multiple stations.

The car feels fine and I don't drive it aggressively but with these logs I'm getting the point of just scraping this and going back to the BMW PPK.

https://datazap.me/u/carguy/custom-t...38-39-40-41-42
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      07-06-2020, 09:40 PM   #8611
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Quote:
Originally Posted by carguy138 View Post
Took two new logs today (use the dropdown in log) and these timing corrections really aren't sitting well with me.

For reference I am NH and run only Shell or Exxon 93 fuel. I started off with the 93 tune then backed off to the 91, then the 91ACN. Then Twisted wrote a custom file essentially detuning the 91ACN. I can't imagine our gas is this bad and I've filled up at multiple stations.

The car feels fine and I don't drive it aggressively but with these logs I'm getting the point of just scraping this and going back to the BMW PPK.

https://datazap.me/u/carguy/custom-t...38-39-40-41-42
Im getting similar behavior along with overboost on latest version

https://datazap.me/u/i471/log-159408...35-36-37-38-39

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      07-07-2020, 12:59 AM   #8612
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Quote:
Originally Posted by slow.e9x View Post
Im getting similar behavior along with overboost on latest version

https://datazap.me/u/i471/log-159408...35-36-37-38-39

I suggest you be careful, you are getting some important overboost numbers like me. I go up to 28.9 PSI.

I suppose you are still using the stock 2.5 BAR TMAP sensor which cannot record pressure numbers higher than 23 PSI, hence why it is pegged at 22.4 PSI.

If you don't have the 3.5 BAR N20 TMAP sensor and you constantly see this overboost number reaching values of 21 and 22, it probably means that it goes higher than 2.5 BAR and that your sensor cannot pick it up.

It would then be wise to pick a 3.5 BAR sensor so you can be careful and monitor what is fully happening.
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Last edited by TheGoodTheBadTheUgly; 07-07-2020 at 01:10 AM..
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      07-07-2020, 08:40 AM   #8613
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Quote:
Originally Posted by carguy138 View Post
Took two new logs today (use the dropdown in log) and these timing corrections really aren't sitting well with me.

For reference I am NH and run only Shell or Exxon 93 fuel. I started off with the 93 tune then backed off to the 91, then the 91ACN. Then Twisted wrote a custom file essentially detuning the 91ACN. I can't imagine our gas is this bad and I've filled up at multiple stations.

The car feels fine and I don't drive it aggressively but with these logs I'm getting the point of just scraping this and going back to the BMW PPK.

https://datazap.me/u/carguy/custom-t...38-39-40-41-42
Not sure where in NH you're located but see if you can find some race gas. The Sunoco near the Lee raceway has some. I had similar issues with finding good gas.
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      07-08-2020, 01:01 PM   #8614
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Quote:
Originally Posted by lwgrenier View Post
Not sure where in NH you're located but see if you can find some race gas. The Sunoco near the Lee raceway has some. I had similar issues with finding good gas.
Great suggestion; you were right! Filled up with 8 gallons of Sunoco 100 octane and took a new log. Almost no timing corrections and everything looks much better.

https://datazap.me/u/carguy/custom-f...-41-42&mark=70

I guess this means that New England 93 is worse than 91ACN? Yikes
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      07-08-2020, 01:34 PM   #8615
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Quote:
Originally Posted by carguy138 View Post
Great suggestion; you were right! Filled up with 8 gallons of Sunoco 100 octane and took a new log. Almost no timing corrections and everything looks much better.

https://datazap.me/u/carguy/custom-f...-41-42&mark=70

I guess this means that New England 93 is worse than 91ACN? Yikes
Good to hear. It's a real bummer we don't have e85. Race gas is just too expensive.
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      07-09-2020, 01:11 PM   #8616
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Before I was struggling to hit boost targets, wgdc was really high, and I had several timing corrections. So I went ahead and replaced my boost solenoid, vacuum lines, and did a boost leak test. I found and addressed a few small leaks. After all the repairs, it seems not much has changed. Would appreciate some help!


Before:
https://datazap.me/u/fmarsjr/3rd-gea...og=0&data=3-13

After Repairs:
https://datazap.me/u/fmarsjr/3rd-gea...=0&data=3-4-14
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      07-09-2020, 04:09 PM   #8617
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Quote:
Originally Posted by fmarsjr View Post
Before I was struggling to hit boost targets, wgdc was really high, and I had several timing corrections. So I went ahead and replaced my boost solenoid, vacuum lines, and did a boost leak test. I found and addressed a few small leaks. After all the repairs, it seems not much has changed. Would appreciate some help!


Before:
https://datazap.me/u/fmarsjr/3rd-gea...og=0&data=3-13

After Repairs:
https://datazap.me/u/fmarsjr/3rd-gea...=0&data=3-4-14
I'm afraid that's normal with our OTS tunes. The following was said a few pages back:
Quote:
Originally Posted by vespa View Post
They neuter the ECU controlled PID system to provide more of a 1980's style boost control whereby the spring in the diverter valve manages the boost instead of the ECU. They say this protects the turbo from overspeed in the event of a catastrophic boost leak. Presumably their maps are all tuned with the stiffer spring of a DV+ so most people will see load 20% or so under target.
I came from N54 with MHD that hit target boost religiously so I definitely noticed that. In fact the N55 maps used to overboost when you first got on the gas causing big throttle closures and less power, but was a lot closer to target. He "fixed" that by doing the above, apparently. If I could, I'd go back to map v1.54 because it made more power and stayed near target without overboosting, for me anyway. I actually have the APK for it, but since the licenses got converted with the new app version, it doesn't see my licenses anymore. Custom tune is the only answer I suppose. He's knee deep in the new Supra nowadays so I'd be surprised if there's ever another update for our cars.

Here's one of my logs with that 1.54 map: https://datazap.me/u/rossburns/2011-...=0&data=3-4-13
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Last edited by CoffeeBean; 07-09-2020 at 04:14 PM..
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      07-09-2020, 05:24 PM   #8618
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Quote:
Originally Posted by CoffeeBean View Post
I'm afraid that's normal with our OTS tunes. The following was said a few pages back:


I came from N54 with MHD that hit target boost religiously so I definitely noticed that. In fact the N55 maps used to overboost when you first got on the gas causing big throttle closures and less power, but was a lot closer to target. He "fixed" that by doing the above, apparently. If I could, I'd go back to map v1.54 because it made more power and stayed near target without overboosting, for me anyway. I actually have the APK for it, but since the licenses got converted with the new app version, it doesn't see my licenses anymore. Custom tune is the only answer I suppose. He's knee deep in the new Supra nowadays so I'd be surprised if there's ever another update for our cars.

Here's one of my logs with that 1.54 map: https://datazap.me/u/rossburns/2011-...=0&data=3-4-13
Yep we already did not have a lot of support on this platform for the OTS maps and now it seems even more hopeless.
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      07-09-2020, 06:01 PM   #8619
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Yep we already did not have a lot of support on this platform for the OTS maps and now it seems even more hopeless.
Damn.

This is why I haven't gone down the PS2 route. Dealing with online tuners is a crap shoot. Would likely spend months going back and forth with tune revisions, slow responses, trying to figure out if problems are hardware or software related, etc.

When I put the APR K04 S3 turbo in my A4, it was an install, flash and done ordeal. Did it all in one weekend.

I still can't believe that I'm getting timing cuts on all cylinders on essentially a detuned 91ACN map while only running top tier 93 gas. Cleans right up when I add some Sunoco 100.
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      07-09-2020, 07:32 PM   #8620
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Quote:
Originally Posted by carguy138 View Post
Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Yep we already did not have a lot of support on this platform for the OTS maps and now it seems even more hopeless.
Damn.

This is why I haven't gone down the PS2 route. Dealing with online tuners is a crap shoot. Would likely spend months going back and forth with tune revisions, slow responses, trying to figure out if problems are hardware or software related, etc.

When I put the APR K04 S3 turbo in my A4, it was an install, flash and done ordeal. Did it all in one weekend.

I still can't believe that I'm getting timing cuts on all cylinders on essentially a detuned 91ACN map while only running top tier 93 gas. Cleans right up when I add some Sunoco 100.
You know there's actually an OTS map for PS2 turbo on Fseries N55. Their maps are made by PureBoost so you'd have a good starting point there for a custom tune. Them or Ken at Wedge Performance who does the N54 OTS maps. This guy with PS2 had great results with Ken: https://www.1addicts.com/forums/show....php?t=1405434
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      07-09-2020, 08:57 PM   #8621
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Originally Posted by slow.e9x View Post
Im getting similar behavior along with overboost on latest version

https://datazap.me/u/i471/log-159408...35-36-37-38-39

Thats a bummer, I have the same problem on stage 2+. On the old maps everything was fine, zero timing corrections on ACN91. Now I'm overboosting with throttle closures and 3-4* pulled on all cylinders. Have to mix 4 gallons E85 to reduce timing corrections. Does anyone have the old APK i can download and go back to old maps?

Nevermind, looks like you cant go back to old maps...

Quote:
Originally Posted by CoffeeBean View Post
I'm afraid that's normal with our OTS tunes. The following was said a few pages back:


I actually have the APK for it, but since the licenses got converted with the new app version, it doesn't see my licenses anymore. Custom tune is the only answer I suppose. He's knee deep in the new Supra nowadays so I'd be surprised if there's ever another update for our cars.

Here's one of my logs with that 1.54 map: https://datazap.me/u/rossburns/2011-...=0&data=3-4-13

Last edited by bmv335ie90; 07-09-2020 at 09:02 PM..
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      07-09-2020, 09:28 PM   #8622
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Quote:
Originally Posted by bmv335ie90 View Post
Nevermind, looks like you cant go back to old maps...
You can get them from apkpure.com but yeah when I installed it thereís no way to sign in and it doesnít recognize my Google account or car.
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      07-10-2020, 12:08 AM   #8623
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Quote:
Originally Posted by CoffeeBean View Post
You can get them from apkpure.com but yeah when I installed it there’s no way to sign in and it doesn’t recognize my Google account or car.
Appreciate the info, I was able to download app version 1.7 and put the v1.54 maps on my car. Back on that juice, here is an old log from the good ol days of pulling like a freight train

https://datazap.me/u/bmv335ie90/log-...47-48-49-50-51
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      07-10-2020, 12:31 AM   #8624
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Quote:
Originally Posted by bmv335ie90 View Post
Quote:
Originally Posted by CoffeeBean View Post
You can get them from apkpure.com but yeah when I installed it there's no way to sign in and it doesn't recognize my Google account or car.
Appreciate the info, I was able to download app version 1.7 and put the v1.54 maps on my car. Back on that juice, here is an old log from the good ol days of pulling like a freight train

https://datazap.me/u/bmv335ie90/log-...47-48-49-50-51
Oh you were able to use your licenses? Did you not already update to v2 of the app and convert them? I assume that's what's keeping mine from working.
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