[E46driver]

So i've been running the active autowerke headers for quite some time now and i have noticed that when launching in DS manual mode after redlining 1st gear into 2nd, the car automatically jumps up to 3rd. What could be the problem? Is it the tranny or possibly the engine is doing this to protect itself from potential destruction?

This only happens after I shift into 2nd from redlining first gear. If i shift into 2nd from any rpm below 6000 in 1st the car will redline 2nd gear if i want it to.


Engine is a N51 and potential related modifications to this issue are performance exhaust and stock airbox w/charcoal filter delete.

[mmmnot]

Try to reset your adaptations, free and simple:

http://www.e90post.com/forums/showth...=gearbox+reset

[Delta0311]

Launch the auto N51/n52 from second gear. The first gear is way too short..

[hassmaschine]

could be a coincidence and caused by something else, or maybe it was always that way? I don't think there's anything in the DME that specifically controls shift points, which is why automatic N52s don't have the equivalent to the Alpina flash. There are automatic rev limiter settings but they don't limit any specific gear lower than the others, and they're actually set higher than the manuals.

[Delta0311]

Originally Posted by hassmaschine

could be a coincidence and caused by something else, or maybe it was always that way? I don't think there's anything in the DME that specifically controls shift points, which is why automatic N52s don't have the equivalent to the Alpina flash. There are automatic rev limiter settings but they don't limit any specific gear lower than the others, and they're actually set higher than the manuals.

I'm almost positive it was always that way... When ever I did a few 0-60 runs in the 328 I always started from 2nd (in DS). My times where always shit when starting from 1st.

[E46driver]

Originally Posted by Delta0311

I'm almost positive it was always that way... When ever I did a few 0-60 runs in the 328 I always started from 2nd (in DS). My times where always shit when starting from 1st.

Before the headers i ran comparisons between 1st gear and 2nd gear launches and do agree that 2nd gear launches were a bit faster than 1st gear launches but now with headers. The pull from 1st gear above 5k rpm is exceedingly better than a 2nd gear.

Launching from 2nd gear also makes 3rd gear feel very weak when compared to launching from 1st. headers or no headers.

[mmmnot]

Originally Posted by hassmaschine

could be a coincidence and caused by something else, or maybe it was always that way? I don't think there's anything in the DME that specifically controls shift points, which is why automatic N52s don't have the equivalent to the Alpina flash. There are automatic rev limiter settings but they don't limit any specific gear lower than the others, and they're actually set higher than the manuals.

The DME/SGS (I believe) does control shift points. I specifically had a shift fault error from a torque sensor (or the computer's internal shifting point 'gauge') causing shift faults.

2 weeks later after a reset, I've had zero problems and notice swifter shifts. Ever since then, I am sold on this method.

[E46driver]

Well, i just reset the adaptions and the issue is still here. The reset did however, make the car shift more smooth and quickly which im still thankful for. But i would still like 2nd gear to redline after 1st

[Tom Droze]

I want to make certain I am understanding the situation correctly, you are in DS manual mode with M 1 displayed on the screen, you nail the gas and upon your first shift the car shifts into third gear with M3 displayed on the screen? Or is there a moment when the car shifts into second gear but then quickly shifts again into third gear?

[hassmaschine]

Originally Posted by mmmnot

The DME/SGS (I believe) does control shift points. I specifically had a shift fault error from a torque sensor (or the computer's internal shifting point 'gauge') causing shift faults.

2 weeks later after a reset, I've had zero problems and notice swifter shifts. Ever since then, I am sold on this method.

that's the transmission computer. not the engine computer. it interfaces with the SGS and has some influence, but it doesn't directly control the shift points. there's no "shift point" map on the DME, that's in the transmission computer..

[E46driver]

Originally Posted by Tom Droze

I want to make certain I am understanding the situation correctly, you are in DS manual mode with M 1 displayed on the screen, you nail the gas and upon your first shift the car shifts into third gear with M3 displayed on the screen? Or is there a moment when the car shifts into second gear but then quickly shifts again into third gear?

There is moment of 2nd gear and it quickly shifts into 3rd.

[jc5988]

you running header without any tune?

[mmmnot]

Originally Posted by hassmaschine

that's the transmission computer. not the engine computer. it interfaces with the SGS and has some influence, but it doesn't directly control the shift points. there's no "shift point" map on the DME, that's in the transmission computer..

TY for the correction.

[hassmaschine]

a tune for the 328i automatic wouldn't be impossible either. The problem is the only easy way to flash it is with WinKFP, and all the calibration files are RSA signed so you can't modify them.

[E46driver]

Originally Posted by jc5988

you running header without any tune?

Nope no tune.

[mmmnot]

Originally Posted by hassmaschine

a tune for the 328i automatic wouldn't be impossible either. The problem is the only easy way to flash it is with WinKFP, and all the calibration files are RSA signed so you can't modify them.

What does that mean? An encryption?

[hassmaschine]

basically yes. the file itself isn't encrypted but you can't change anything without running afoul of the RSA signature.

[mmmnot]

Originally Posted by hassmaschine

basically yes. the file itself isn't encrypted but you can't change anything without running afoul of the RSA signature.

Interesting.

I mean, it can't be impossible to modify. I would imagine AA and other tuners need to modify it for said tune.

From a Computer Science background, I'm curious to see how 'easy' it would be to manipulate...

[matteblue3er]

Is this repeatable 100% of the time?

If it's intermittent, I would check the gear shift assembly harness. It's a known failure on all E9x models with auto trans.

Have you noticed the gear indicator switching to M2 or M3 from D or DS when the car acts up?

[hassmaschine]

Originally Posted by mmmnot

Interesting.

I mean, it can't be impossible to modify. I would imagine AA and other tuners need to modify it for said tune.

From a Computer Science background, I'm curious to see how 'easy' it would be to manipulate...

AA doesn't have a tune for the N52 transmission. They don't use WinKFP to flash the DME, either.

Unless you can hack the RSA signature it's not going to happen.

[mmmnot]

Originally Posted by hassmaschine

AA doesn't have a tune for the N52 transmission. They don't use WinKFP to flash the DME, either.

Unless you can hack the RSA signature it's not going to happen.

Sorry in advanced:

http://www.***********.com/content.p...-ECU-s-cracked

They already cracked F series. I need to get drunk this weekend and see what I can find out.

http://www.e90post.com/forums/showthread.php?p=18629297 - awesome thread on it if you're bored.

[hassmaschine]

yeah I don't think that will apply. You'd have to buy a CMD Flash module and it only works with TriCore CPUs, specifically on DMEs from the N55-on. We don't even know what CPU is in the TCU.