[vasillalov]

Originally Posted by Imperator

The only puzzling thing is how my DME type changed from IJC0S to IJE0S.

Those 6 characters which Cobb uses as ECU identifiers are actually the last 6 digits of your DME program reference number. The DME stores the last 16 program version reference numbers in its memory. It is designed to for dealerships to check how often and which updates have been performed on your DME. Think of it as a log of all updates BMW did to your car:

[BongC36]

Hello, another satisfied user of v4.00 Sport LT here. I have a 6MT so the linear map is really good for me. I used to have a hard time modulating the throttle at 1st and 2nd gears (too sensitive) especially during stop-and-go traffic situations. Now I can drive off much smoother, off the boost unless I need it

Well done COBB!

[Dr_Dirt]

For some reason I lost 18whp using 4.0 stage 1+ verses 3.01 Stage 1
I picked up torque in lower rpms but lost power in high rpms.

solid line is the 1+ sport ST....
mods are ETS 5" and drop in air filter.
http://www.e90post.com/forums/attach...1&d=1332454763

[marv85]

well you are making more boost down low but less boost up in the rpms... why? is this stage1+ agg vs stage 1 agg?

[Dr_Dirt]

Originally Posted by marv85

well you are making more boost down low but less boost up in the rpms... why? is this stage1+ agg vs stage 1 agg?

Yes, Stage1+ Sport is the solid line with 1+ Agg closely following it.

The old stage1 agg is the dashed line that starts lower but ending up with higher power.

Based on these results I am better off with the stage 1 and not the 1+.

[ajsalida]

Originally Posted by Dr_Dirt

Yes, Stage1+ Sport is the solid line with 1+ Agg closely following it.

The old stage1 agg is the dashed line that starts lower but ending up with higher power.

Based on these results I am better off with the stage 1 and not the 1+.

Maybe in terms of peak HP, but based on the area under TQ curves I bet you're much faster (say 0-100 mph) with either of the v400 stage 1+ FMIC's.

BTW are these corrected plots, and were they run back to back?

edit: also wonder if any timing was being pulled on the 2 v400's, seems odd aggressive is almost identical to sport.

[Mangler]

With the COBB additional fueling, and lower target AFR's lower in the revs compared to the other tunes, are there any concerns with fuel wash long term?

T

[Dr_Dirt]

Originally Posted by ajsalida

Maybe in terms of peak HP, but based on the area under TQ curves I bet you're much faster (say 0-100 mph) with either of the v400 stage 1+ FMIC's.

BTW are these corrected plots, and were they run back to back?

edit: also wonder if any timing was being pulled on the 2 v400's, seems odd aggressive is almost identical to sport.

yes the 1+ dynos were run back to back the stage 1 was run two weeks ago --> http://www.e90post.com/forums/showpo...&postcount=192

It seems the sport and agg are about even....

[805beemer]

you could always use the performance menu and see which map runs the best 1/4 mile time/trap speed.

[marv85]

Originally Posted by Dr_Dirt

yes the 1+ dynos were run back to back the stage 1 was run two weeks ago --> http://www.e90post.com/forums/showpo...&postcount=192

It seems the sport and agg are about even....

just out of curiosity, why not run stage1+ agg? did you downgrade your fuel

[Dr_Dirt]

Originally Posted by marv85

just out of curiosity, why not run stage1+ agg? did you downgrade your fuel

Still running 93 oct but it seems that the 1+ agg might be too aggressive if I lose power up top verses a stage 1.
I would say I am a victim of diminishing returns if more boost yields less HP in the high rpms.
Maybe I need a free flowing exhaust, but going by what COBB recommends all i need is the IC , but maybe we need more??

[phazen23]

Anyone at COBB willing to say when the 4.01 maps will be public/stable? I'd really like to switch, without using my daily driver as a guinea pig =)

[marv85]

Originally Posted by Dr_Dirt

Still running 93 oct but it seems that the 1+ agg might be too aggressive if I lose power up top verses a stage 1.
I would say I am a victim of diminishing returns if more boost yields less HP in the high rpms.
Maybe I need a free flowing exhaust, but going by what COBB recommends all i need is the IC , but maybe we need more??

do you have logs of the dyno run? may be that would shed more light on what is going on.

you can always Ask Rob. See what he has to say.

[Dr_Dirt]

Originally Posted by marv85

do you have logs of the dyno run? may be that would shed more light on what is going on.

you can always Ask Rob. See what he has to say.

I might have the logs, they supposedly logged the runs with my AP...

[mundo74]

Originally Posted by COBB Tuning

Beta maps for the BMW N54 AccessPORT are now available for download and evaluation. These v4.00 BETA maps were developed to provide smoother response, more power and address the 3k RPM "surge" that some users have been experiencing. In addition, Stage1+FMIC BETA maps have been released for those cars with upgraded intercoolers, but without the necessary exhaust modifications to satisfy Stage2 hardware requirements.

Please note that these are BETA maps and may or may not perform as intended across all vehicles. This BETA release is intended to gather feedback from early adopters and incorporate it into the maps prior to final release. If you are unwilling to experience potential performance inconsistencies or provide constructive feedback on these BETA maps, please continue to use the General Release v3.01 maps until the v4.00 maps are finalized and come out of beta.

Maps are available in the BMW AccessPORT Map Database. Please clear your browser cache and refresh, then simply click the red BETA Maps button, review the acceptance page, and click the I Accept button to be taken to the BETA v4.00 maps. If you are unfamiliar with the process of downloading maps, transferring them to your AccessPORT and flashing the ECU, please review our Step-by-Step Map Download and Transfer Tutorial.

Not sure how Cobb needs the feedback but here it goes

Installed this morning and it took 10 mins to change the map from v3 to the v4 beta. Usually it's 1 min between v3 maps

Smoother as the lump around 3k is virtually gone. Does not feel as aggressive as the v3 but that could be due to the smoothness. Need 1/4 times to compare.

A few wot pulls registered about 1 psi lower boost vs v3. All aggressive with linear throttle comparisons with 93 oct

One mile after install the half engine light came on and engine virtually died worst than with the limp mode no power at all. A code was thrown that had something with an internal dme error in not getting torque values. Can't remember the actual code. Restart the car and it's been fine all day.

[BMWsky]

Originally Posted by mundo74

Not sure how Cobb needs the feedback but here it goes

Installed this morning and it took 10 mins to change the map from v3 to the v4 beta. Usually it's 1 min between v3 maps

Smoother as the lump around 3k is virtually gone. Does not feel as aggressive as the v3 but that could be due to the smoothness. Need 1/4 times to compare.

A few wot pulls registered about 1 psi lower boost vs v3. All aggressive with linear throttle comparisons with 93 oct

One mile after install the half engine light came on and engine virtually died worst than with the limp mode no power at all. A code was thrown that had something with an internal dme error in not getting torque values. Can't remember the actual code. Restart the car and it's been fine all day.

That's a known issue for certain ROMs. Contact Cobb and get the new maps.

[ajsalida]

v4.01 maps are up....Dr D this may solve your issue...

http://www.e90post.com/forums/showthread.php?t=666069

[Dr_Dirt]

Originally Posted by ajsalida

v4.01 maps are up....Dr D this may solve your issue...

http://www.e90post.com/forums/showthread.php?t=666069

OoOo well this would be nice if it did I can load these up and get a dyno again

[rader1]

Originally Posted by Mangler

With the COBB additional fueling, and lower target AFR's lower in the revs compared to the other tunes, are there any concerns with fuel wash long term?

T

I think Cobb has less of a possibility of fuel wetting than the other tunes. Cobb runs the stock fuel rail pressure(this is 100% true, log it yourself) and just "opens up" the injector duration table so that it can run as much(or little) dwell as required. Piggys just crank the rail pressure and hope for the best(not exactly, but pretty much)

[Dr_Dirt]

Originally Posted by marv85

do you have logs of the dyno run? may be that would shed more light on what is going on.

you can always Ask Rob. See what he has to say.

Here is the log, can you look at it?http://www.e90post.com/forums/attach...1&d=1332469633

[wren57]

Originally Posted by Rob@Cobb

Make sure to run APM 2.0.2.0 or later. You can update APM by click on "Options" and then "Update AccessPORT Manager" or download it from here:
http://www.cobbtuning.com/BMW-Access...rt/bmw/support

Once APM is updated, it will properly update your AP.

Cheers,
Rob

This did not work for me. Please advise.

[Carl Morris]

Does your APM look like this?