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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 > Timing corrections all over the place. Help!



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      12-08-2018, 02:36 PM   #1
Mackie_
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Hi guys, im a new member but a long time reader on this forum. I hope you guys can help me understand my data log. I’ve installed a DP and CP 3 days ago and tuned with mhd stage 2. I tried to do a quick pull data logging for the first time and wasn’t even sure if i did it right so please bare with me. I think i didn’t even make past 5500 rpm as the road i was on wasn’t sufficient to do so. I pulled the log and i noticed that my car has made timing corrections on all cylinders and they are all over, i’ve tried reading about it and it seems no good.
So now i need some help with this.

Here’s my car’s background history:
2011 335i xdrive 6spd with 140k km
MHD stage 2 91oct, vrsf dp and cp, muffler delete.
Cylinder head, vanos solenoids, vcg, hg, ofhg has been replaced through warranty roughly about 25k km ago.
MAF and oem sparkplugs, waterpump, t-stat has been replaced 20k km ago.
I believe the coils hasnt been replaced ever since and now on my next to do list.
I don’t race or abuse my car, quick 2nd to 3rd gear wot maybe once or twice a month.
I suspect i’m having the infamous pcv problem for n55 as i can hear chipmunks like sound intermittently when braking and coming to a stop.

Does having a bad coils can affect timing corrections?
Here is my log.

https://datazap.me/u/mackie/log-1544...og=0&data=3-11

Hope you guys can help me. Thanks a lot!
Appreciate it!
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      12-08-2018, 02:49 PM   #2
Pladi
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If ur looking for a magical solution ull be disappointed.

Since u said km i am assuming ur in canada. Dont run that map anymore. You will ruin ur engine. You clearly dont have good fuel.. in canada run acn 91. Unless ur using special high octane fuel for racing.

Change ur coils but thats not going to magically make u run this map. But good gas will. (Higher octane)
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      12-08-2018, 05:08 PM   #3
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Quote:
Originally Posted by Pladi View Post
If ur looking for a magical solution ull be disappointed.

Since u said km i am assuming ur in canada. Dont run that map anymore. You will ruin ur engine. You clearly dont have good fuel.. in canada run acn 91. Unless ur using special high octane fuel for racing.

Change ur coils but thats not going to magically make u run this map. But good gas will. (Higher octane)
Yes, i'm in Canada and i run Shell V power 91oct. so what you're trying to say is that it might be the gasoline that's throwing these timing corrections is that right? So, what kind of map would you suggest of me to run then? thanks.
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      12-08-2018, 05:51 PM   #4
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The tuner made 91 ACN map. Stage 1. I know you have supporting maps but you have to listen to what your car is telling you. The maps are not custom and will not work as well for everyone. Your corrections happen because knock is detected. Knock is a very destructive condition. Cylinder chamber pressures during knock are much higher. High octane fuel is more knock resistant. The fuel in canada is not the best.

Run 91 ACN and see the difference. A bigger intercooler and down pipe are not going to compensate for canadian winter butane filled gas..
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      12-08-2018, 06:21 PM   #5
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Quote:
Originally Posted by Pladi View Post
The tuner made 91 ACN map. Stage 1. I know you have supporting maps but you have to listen to what your car is telling you. The maps are not custom and will not work as well for everyone. Your corrections happen because knock is detected. Knock is a very destructive condition. Cylinder chamber pressures during knock are much higher. High octane fuel is more knock resistant. The fuel in canada is not the best.

Run 91 ACN and see the difference. A bigger intercooler and down pipe are not going to compensate for canadian winter butane filled gas..
so is it ok to stick with vpower and flash with acn91 or i should fill up with 94oct?
i just literally filled up a tank with vpower before reading your reply.
thanks for your inputs. really appreciate it.
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      12-08-2018, 06:48 PM   #6
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What's the highest octane you can get?
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      12-08-2018, 06:53 PM   #7
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Quote:
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What's the highest octane you can get?
i can get 94oct through petro canada. i've been using vpower 91oct ever since cause of the air miles points and just recently flash tuned. i dont think my car doesnt like shell anymore and the map im running right now.
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      12-08-2018, 06:58 PM   #8
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91 from shell or any station works ok with acn 91. Obv you dont get as much power out of it but its safer for your car.

So 94 octane i found works ok for me with 91 map stage one. Stage 2 i would not touch unless i had e30 or meth.
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      12-08-2018, 07:11 PM   #9
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Quote:
Originally Posted by Pladi View Post
91 from shell or any station works ok with acn 91. Obv you dont get as much power out of it but its safer for your car.

So 94 octane i found works ok for me with 91 map stage one. Stage 2 i would not touch unless i had e30 or meth.
ok, i'll flash on acn91 and will do a log again and see if it gets better. thanks!
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      12-15-2018, 05:28 PM   #10
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These engines need as much octane as they can get for maximum performance. WMI is THEE best performance upgrade when in search for power.
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      12-15-2018, 05:40 PM   #11
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These engines need as much octane as they can get for maximum performance. WMI is THEE best performance upgrade when in search for power.
i did another short pull with stage 2 acn91/cad94 but the timing corrections are still apparent on all cylinders but it seems a bit better compared to 91oct map.

here's another log
https://datazap.me/u/mackie/log-1544...=3-13-20-21-23
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      12-16-2018, 04:23 PM   #12
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Quote:
Originally Posted by Mackie_ View Post
i did another short pull with stage 2 acn91/cad94 but the timing corrections are still apparent on all cylinders but it seems a bit better compared to 91oct map.

here's another log
https://datazap.me/u/mackie/log-1544...=3-13-20-21-23
timing corrections rarely disappear.. ( esp with our gas in canada) but you went from abnormal to normal amount
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      12-16-2018, 04:27 PM   #13
Mackie_
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Quote:
Originally Posted by Pladi View Post
Quote:
Originally Posted by Mackie_ View Post
i did another short pull with stage 2 acn91/cad94 but the timing corrections are still apparent on all cylinders but it seems a bit better compared to 91oct map.

here's another log
https://datazap.me/u/mackie/log-1544...=3-13-20-21-23
timing corrections rarely disappear.. ( esp with our gas in canada) but you went from abnormal to normal amount
so this corrections on the new log are in the normal range? sorry for all the questions as im new to logging.

could you expand a little more about what's normal under this engine?

i want to fill up petro94 on the next tank and ill see the difference.
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      12-16-2018, 04:39 PM   #14
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Quote:
Originally Posted by Mackie_ View Post
so this corrections on the new log are in the normal range? sorry for all the questions as im new to logging.

could you expand a little more about what's normal under this engine?

i want to fill up petro94 on the next tank and ill see the difference.
lol np sir

-3 degrees on no more than 3 cylinders. Your timing corrections started at the lower rpm which is common because more load. After that the DME did not correct anymore.
On ur previous log the corrections continue almost through the pull on all cylinders with alot of timing retard up to 6 degrees

Petro 94 should def be better however let the car adapt to new fuel.
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      03-16-2019, 04:12 PM   #15
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Damn we got shit fuel in Canada!
And apparently no E30? If i am not mistaking.
And propane power only for limo and caddies?
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