[Sean335i]

Originally Posted by Sean335i

not the best at understanding all the variables, but i can see my car is lagging as all hell

http://datazap.me/u/sean335i/stage-2...zoom=3494-5494

Boost is hitting in the higher RPM ranges which seems atypical for our cars. Thoughts?

Edit: closer view on pull, this is freeway to work driving, may not be the best example

http://datazap.me/u/sean335i/stage-2...zoom=4189-4320

anyone? feels like my car struggles to load boost until high RPM...

[Mit_Boost]

Originally Posted by Fillyo75

My car seems to studder a little on the highway when I floor in 5th or 6th gear, but I only have 1 P error code, which I believe is nothing. I want to try out the Cobb but I am paranoid something else is wrong. Do I have anything to worry about with these codes?

What's the P-code or fault code description?

Originally Posted by Sean335i

anyone? feels like my car struggles to load boost until high RPM...

What map are you using? You're also not getting a complete data set, try to get 2 quality logs, from 2.5k to 6k. I'm not sure what the V3's default data log list is, but I usually switch Cylinder Timing to Cylinder 2, and then log Timing Corrections for Cylinders 3, 4, 5 & 6.

[alwayseuro]

Pulled the trigger and went with cobb. Can't wait to wake this motor up a bit this weekend.

[R3N]

Flashed a new map (from PTF) onto the car today, and all appeared well. When i took it for a drive i noticed the transmission would start off in D2, then shift to D3 at a standstill and take off in D3. Sport mode would also start in S2 then S3. I have the Alpina TCU flash. I flashed other maps and it did the same thing. Eventually, i flashed back to the new map and took it for a drive.

Decided to drive in manual mode, 5 minutes into my drive the engine started to rev freely until about 3k rpm then settle back down and it was selecting gears as per normal.

Anyone experienced this or similar before? Its working fine now, but have concerns as to what may have caused this behaviour.

[raptor335]

Used it once for tune and once to return to factory settings. Asking $500

I used it for N54 E92:

[sickem]

Originally Posted by raptor335

Used it once for tune and once to return to factory settings. Asking $500

I used it for N54 E92:

You might be better off posting this in the
turbo engine for sale section. GLWS!

[alwayseuro]

just did a data log. I did a pull in 2nd n 3rd. cobb said in hit 21.6 psi. Is this correct for a stage 1 aggressive tune??

[Allen@MOTIV]

Post the log. If you can; use datazap.me because it makes it much easier to view the log.

[alwayseuro]

Originally Posted by Allen@PTF

Post the log. If you can; use datazap.me because it makes it much easier to view the log.

http://datazap.me/u/alwayseuro/stage1-2nd-n-3rd-gear

please lmk if I did it right its my first time doing it.

[Allen@MOTIV]

Originally Posted by alwayseuro

http://datazap.me/u/alwayseuro/stage1-2nd-n-3rd-gear

please lmk if I did it right its my first time doing it.

There is definitely some boost overshoot going on here. Quite severe, actually. However, the only time there is a huge spike is during the shift. Which is to be expected.

Other then the overboost issue the log looks pretty good.

[Mit_Boost]

Originally Posted by R3N

Flashed a new map (from PTF) onto the car today, and all appeared well. When i took it for a drive i noticed the transmission would start off in D2, then shift to D3 at a standstill and take off in D3. Sport mode would also start in S2 then S3. I have the Alpina TCU flash. I flashed other maps and it did the same thing. Eventually, i flashed back to the new map and took it for a drive.

Decided to drive in manual mode, 5 minutes into my drive the engine started to rev freely until about 3k rpm then settle back down and it was selecting gears as per normal.

Anyone experienced this or similar before? Its working fine now, but have concerns as to what may have caused this behaviour.

I have the 6AT/Alpina Flash and have noticed that if I drive the car immediately after flashing the car to a new map, that the trans incorrectly goes through the gears and then will randomly downshift. Usually after flashing, I try to wait 10-15 minutes (100% off) and this issue doesn't occur.

[R3N]

Originally Posted by Mit_Boost

I have the 6AT/Alpina Flash and have noticed that if I drive the car immediately after flashing the car to a new map, that the trans incorrectly goes through the gears and then will randomly downshift. Usually after flashing, I try to wait 10-15 minutes (100% off) and this issue doesn't occur.

In a sense, it is a relief that I am not alone in experiencing this. Anyone else? Although I haven't really noticed this on other occassions. But since my post until now, the transmission isn't acting up again.

[Allen@MOTIV]

Originally Posted by R3N

In a sense, it is a relief that I am not alone in experiencing this. Anyone else? Although I haven't really noticed this on other occassions. But since my post until now, the transmission isn't acting up again.

There has been some unusual activity reported immediately post flashing. There has been no longterm negative performance to the best of my knowledge.

[lfpontes]

HELP!

Hello,

I own a 335i E90 N54 auto here in Brazil.. It has AMS DP, K&N inbox, COBB, and AA BOV .

Everytime I change my current map with the cobb system, the car seems to be stuck in 2nd or 3rd gear for a while, and suddenly it drops to 1st after a few ft of driving and everything stays normal.
This only happens right after I switch the map, when I turn on the car. And only one time every time the map is switched.

Also, if I select Reverse before the car has dropped to 1st, there is a big CLUNK noise coming from the transmission.

Why does this happen? I cant seem to find any plausible answers on Google or any other source. Also, the car missfires a little bit in its first start in the morning.


Thanks guys!

[33FAF]

Originally Posted by lfpontes

HELP!

Hello,

I own a 335i E90 N54 auto here in Brazil.. It has AMS DP, K&N inbox, COBB, and AA BOV .

Everytime I change my current map with the cobb system, the car seems to be stuck in 2nd or 3rd gear for a while, and suddenly it drops to 1st after a few ft of driving and everything stays normal.
This only happens right after I switch the map, when I turn on the car. And only one time every time the map is switched.

Also, if I select Reverse before the car has dropped to 1st, there is a big CLUNK noise coming from the transmission.

Why does this happen? I cant seem to find any plausible answers on Google or any other source. Also, the car missfires a little bit in its first start in the morning.


Thanks guys!

I am not sure but it Seems like its a transmission problem. Does it ever happen when you are on stock map? Does it happen when the car is cold more importantly when the transmission is still cold and things go back to normal after you've driven the car for a while? if so then i guess the valve body/tcu has a problem, i think its best to check if the transmission has stored any faults. Again i might be wrong just asking for clarifications.

[Jeffman]

Originally Posted by lfpontes

HELP!

Hello,

I own a 335i E90 N54 auto here in Brazil.. It has AMS DP, K&N inbox, COBB, and AA BOV .

Everytime I change my current map with the cobb system, the car seems to be stuck in 2nd or 3rd gear for a while, and suddenly it drops to 1st after a few ft of driving and everything stays normal.
This only happens right after I switch the map, when I turn on the car. And only one time every time the map is switched.

Also, if I select Reverse before the car has dropped to 1st, there is a big CLUNK noise coming from the transmission.

Why does this happen? I cant seem to find any plausible answers on Google or any other source. Also, the car missfires a little bit in its first start in the morning.


Thanks guys!

Sounds normal for somebody with Cobb and Alpina TCU flash. I have it too and that is how it behaves. It goes away and acts fine in a few minutes.

[lfpontes]

Also, someone mentioned here about a certain Turbo lag witht eh Cobb Stock maps, and that definently happens with my car.
Drove a friend´s 335i with a custom map, but considered Stage 1, and it was a LOT stronger down the rev band, while my car only wakes up mid-top the rev band.
It does not even feel like a TT car with that behaviour.

Is that normal for cobb map?
Im running Stage 2 agressive Without FMIC.
My car has the Alpina TCU, Downpipes, and BOV/chargepipe.

Any input on that would be very helpful!

Is there a way to download new Cobb maps, sort of updated ones?

Thanks!

[Mit_Boost]

Originally Posted by lfpontes

Also, someone mentioned here about a certain Turbo lag witht eh Cobb Stock maps, and that definently happens with my car.
Drove a friend´s 335i with a custom map, but considered Stage 1, and it was a LOT stronger down the rev band, while my car only wakes up mid-top the rev band.
It does not even feel like a TT car with that behaviour.

Is that normal for cobb map?
Im running Stage 2 agressive Without FMIC.
My car has the Alpina TCU, Downpipes, and BOV/chargepipe.

Any input on that would be very helpful!

Is there a way to download new Cobb maps, sort of updated ones?

Thanks!

Look at logs... There's a good chance that the car is still on boost & more powerful, it just feels (which is very subjective) "not as powerful". There's also a possibility that the PROtuner your friend used doesn't like to use lots of boost downlow, which logs once again would prove.

Not for nothing, it shouldn't be surprising that more lag exists vs. the OEM tune which peaks at 8-9 psi, when I believe even the Stage 1 Maps go to ~12 psi. You've raised the target, it will naturally take a little longer. By no means the N54 with stock turbos is laggy though, cause if you think it is just go for a ride in a big turbo EVO that probably won't go on boost until 5K.

[lfpontes]

I understand, I own a Porsche 930 Turbo with Black Forest Racing engine, strocked to 3.5 liters and 1.5 kg boost on the bigger Turbo, while the stock car peaks at 0.8.
Now thats what I call a Turbo lag. Up until 4, 4.5K RPM, there no virtually no boost. Then, all hell brakes loose.

How can I measure data log, boost etc on Cobb? I am really a newbie with the system.

[chepy24]

hey guys i have a question! on my log my req boost seems way high but my actual boost seems to be where it needs is this something normal on cobb? its my first log just trying to get a better understanding http://datazap.me/u/chepy24/log-1-ag?log=0&data=1-8-20

[Allen@MOTIV]

Originally Posted by chepy24

hey guys i have a question! on my log my req boost seems way high but my actual boost seems to be where it needs is this something normal on cobb? its my first log just trying to get a better understanding http://datazap.me/u/chepy24/log-1-ag?log=0&data=1-8-20

There is two different boost measurements taken by the AP. There is absolute PSI which is what the DME uses for boost targets and then there is "boost" which is basically just for display purposes and is dispalyed in PSIg. Which is where your confusion is coming from. Compare boost mean abs and req boost abs NOT boost(psi).

PSIg + atmospheric = absolute PSI

As far as your log is concerned it looks pretty good aside from the boost oscillations you're having down low.

[chepy24]

Originally Posted by Allen@PTF

There is two different boost measurements taken by the AP. There is absolute PSI which is what the DME uses for boost targets and then there is "boost" which is basically just for display purposes and is dispalyed in PSIg. Which is where your confusion is coming from. Compare boost mean abs and req boost abs NOT boost(psi).

PSIg + atmospheric = absolute PSI

As far as your log is concerned it looks pretty good aside from the boost oscillations you're having down low.

ohhhhhh ok got it! thanks still learning but that is why i love these forums! on that boost oscillations is that something that is normal? i was told could be wastegates??? iv also heard those can be fixed when i get my custom map is that right?