[David Tin]

Originally Posted by EvaBmw

Im glad i started this thread as it seems to be helping a few people with the underpowered 323i n52b25 which is great, and seems to be continuing to evolve to include the MSV80 with the help of rjahl and cheerio. Thanks fullas, this forum is f$%kn awesome. Can you post an update and tell us if it works David?

YAP I'll maybe Tomorrow

[David Tin]

Originally Posted by cheerio

I've taken the 325i ZB#8619551 (I assume it's newer than ZB#8619537) and set powerclass byte to 0. Zip is attached.

To find the powerclass byte, I wrote a custom script in Python, which reads through all the input bins byte by byte and compares them. Nothing super fancy, but it works well for finding powerclass byte. I've attached it as well.

Hope that helps!

Hi: EvaBmw Today I drove my E90 to work. On the way to Durham Skydiving Academy, I only appreciated the 323-325 plan. Thank you cheerio. Thank you (rjahl) who are willing to answer and prompt the clues on this page. Now only the (GM) gearbox is not flashing(Information correction: it is not a ZF gearbox, it should be a GM), but I am very satisfied with the current performance. I think there should be a flash program comparable to Winkfp to make the gearbox perform better.

[cheerio]

Good to hear it worked for you! Have you added the small DISA yet? It improves things further at lower RPM.

Yep, I never quite figured out how to flash the gearbox with WinKFP, because I ended up using ISTA-P instead. It's probably possible, but would have to find the right ZB#.

I kind of hate my GM gearbox. I changed fluid/filter and reset adaptations ~3000km ago, but it's started to shudder again recently when under heavy load. Might just end up finding a 2010/2011 ZF box and swapping that in.

[David Tin]

Originally Posted by cheerio

Good to hear it worked for you! Have you added the small DISA yet? It improves things further at lower RPM.

Yep, I never quite figured out how to flash the gearbox with WinKFP, because I ended up using ISTA-P instead. It's probably possible, but would have to find the right ZB#.

I kind of hate my GM gearbox. I changed fluid/filter and reset adaptations ~3000km ago, but it's started to shudder again recently when under heavy load. Might just end up finding a 2010/2011 ZF box and swapping that in.

Little DISA, I have to thank EvaBmw for the inspiration given to me. Look at my cutting holes. They are very precise. I use more sophisticated tools to DIY (with photos). The tube has been installed. Before I do this program, I have a plan. , Upgrade the tube, then flash RSA/DME, and finally find a way to modify the gearbox.

[David Tin]

Originally Posted by cheerio

Good to hear it worked for you! Have you added the small DISA yet? It improves things further at lower RPM.

Yep, I never quite figured out how to flash the gearbox with WinKFP, because I ended up using ISTA-P instead. It's probably possible, but would have to find the right ZB#.

I kind of hate my GM gearbox. I changed fluid/filter and reset adaptations ~3000km ago, but it's started to shudder again recently when under heavy load. Might just end up finding a 2010/2011 ZF box and swapping that in.

Do you think the problem with the gearbox is due to VB12? I think the official method should be used to flash. Maybe it will be a safer way to find the program upgrade of the GM-325 gearbox.

[dindf]

Originally Posted by rjahl

Check your Bimmerlabs account

I am wondering whether e60-n52-523-gearbox can also be used-GKE211?

[F31B48]

Originally Posted by cheerio

Good to hear it worked for you! Have you added the small DISA yet? It improves things further at lower RPM.

Yep, I never quite figured out how to flash the gearbox with WinKFP, because I ended up using ISTA-P instead. It's probably possible, but would have to find the right ZB#.

I kind of hate my GM gearbox. I changed fluid/filter and reset adaptations ~3000km ago, but it's started to shudder again recently when under heavy load. Might just end up finding a 2010/2011 ZF box and swapping that in.

The GM boxes are notorious for this. Others on this forum have had good results from adding a tube of Dr tranny anti shudder. Works really well apparently and lasts a good while. You can get it from repco https://www.repco.com.au/en/oils-flu...610/p/A9417139

What fluid did you use when you changed it?

[cheerio]

Originally Posted by EvaBmw

The GM boxes are notorious for this. Others on this forum have had good results from adding a tube of Dr tranny anti shudder. Works really well apparently and lasts a good while. You can get it from repco https://www.repco.com.au/en/oils-flu...610/p/A9417139

What fluid did you use when you changed it?

Used Penrite ATF LV, which is supposed to be DEXRON-VI compatible. I imagine the anti-shudder wouldn't do anything to help the jerky shifts, right?

[dindf]

Originally Posted by cheerio

Used Penrite ATF LV, which is supposed to be DEXRON-VI compatible. I imagine the anti-shudder wouldn't do anything to help the jerky shifts, right?

How many kilometers has your car been used so far? Because the gearbox also has a service life, my ZF transmission system was rebuilt at 130,000 kilometers. The number of kilometers used may not be related to the gearbox loss, but it is certain that the gearbox will wear out. If I am You, I will decide whether to change to a second-hand ZF system, I think ZF should be available at a cheap price now.

[cheerio]

Originally Posted by dindf

How many kilometers has your car been used so far? Because the gearbox also has a service life, my ZF transmission system was rebuilt at 130,000 kilometers. The number of kilometers used may not be related to the gearbox loss, but it is certain that the gearbox will wear out. If I am You, I will decide whether to change to a second-hand ZF system, I think ZF should be available at a cheap price now.

It's done 137k; I believe the newer GM boxes tend to hold up better, but mine is the earlier (2008) revision.
I reckon a used ZF is the way to go, especially because they can be tuned unlike the GM. Had a look on RealOEM - apparently 323i and 325i from 09/2010 and onwards went back to the ZF 6HP19Z.

[dindf]

Guys check this: I am very worried about this question... BMW info about the 323i engine (picture), although it is the same as the 325i 2500cc, but looking at the engine block part, one (low compression engine) is only used for the 323i, and the above two (413/412) It can also be used in 323/325, do I need to worry after the upgrade? If 323i are all (11110422965)........

[F31B48]

Originally Posted by dindf

Guys check this: I am very worried about this question... BMW info about the 323i engine (picture), although it is the same as the 325i 2500cc, but looking at the engine block part, one (low compression engine) is only used for the 323i, and the above two (413/412) It can also be used in 323/325, do I need to worry after the upgrade? If 323i are all (11110422965)........

No, i highly doubt if your car would have a low compression engine if it's a Japan spec, that engine wasn't an option there. Do you have option S858 in your vehicle order?

[F31B48]

Originally Posted by cheerio

Used Penrite ATF LV, which is supposed to be DEXRON-VI compatible. I imagine the anti-shudder wouldn't do anything to help the jerky shifts, right?

No it won't. Genuine fluid may help though. I've heard of people having issues with shift quality using the Penrite oil in the ZF trans. Not heard anything bad with the GM though. The ZF is a much better trans imo

[dindf]

Originally Posted by EvaBmw

No, i highly doubt if your car would have a low compression engine if it's a Japan spec, that engine wasn't an option there. Do you have option S858 in your vehicle order?

(323i) There are such models in Europe and Asia (Japan/Taiwan), but they are actually called the European version, so no matter which VIN is 323i, enter the info query, you should see
(S858A), I'm just not sure if it is really equipped with this (low compression engine) because (11112334413 OR 11112334412) should also be used in 323i, or is this just unnecessary worry?

Then I checked again

I think should go to BMW info Engine-Short Engine to look at the entire engine, instead of looking at the Engine block option, so that one thing can be found, even if the Short Engine has the (S858A) Low compression engine, there is still an application. In Z4-2.5.

[F31B48]

Originally Posted by dindf

(323i) There are such models in Europe and Asia (Japan/Taiwan), but they are actually called the European version, so no matter which VIN is 323i, enter the info query, you should see
(S858A), I'm just not sure if it is really equipped with this (low compression engine) because (11112334413 OR 11112334412) should also be used in 323i, or is this just unnecessary worry?

Then I checked again

I think should go to BMW info Engine-Short Engine to look at the entire engine, instead of looking at the Engine block option, so that one thing can be found, even if the Short Engine has the (S858A) Low compression engine, there is still an application. In Z4-2.5.

You're stressing over nothing. Even if it is a low compression engine it's not like the engine is going to blow up.

Your engine type is stamped on the block and there is also a white sticker on the front of the cylinder head as well, so you could check that if that will give you peace. Mine says N52B25AE. The sticker is on the front of the cylinder head below the camshaft sensors (may be covered in dirt) and it is stamped on the left side of the block, in the middle of the engine under the intake manifold. You can see it if you look between the manifold runners.

[dindf]

Originally Posted by EvaBmw

You're stressing over nothing. Even if it is a low compression engine it's not like the engine is going to blow up.

Your engine type is stamped on the block and there is also a white sticker on the front of the cylinder head as well, so you could check that if that will give you peace. Mine says N52B25AE. The sticker is on the front of the cylinder head below the camshaft sensors (may be covered in dirt) and it is stamped on the left side of the block, in the middle of the engine under the intake manifold. You can see it if you look between the manifold runners.

Yes, I worry too much, mine is the same as yours N52B25AE, but this (low compression engine) does not know which 323i engine is used.

[F31B48]

Originally Posted by dindf

Yes, I worry too much, mine is the same as yours N52B25AE, but this (low compression engine) does not know which 323i engine is used.

No that is incorrect. If your engine was low compression it would have N52B25B or N52B25BE. Don't worry your engine is NOT low compression.

[dindf]

Just after I completed the 323i upgrade, my friend's E60-523i was also upgraded, thank you very much for the assistance of rjahl, the final version of Z4 is really great.

[DoomerDan]

Originally Posted by dindf

Just after I completed the 323i upgrade, my friend's E60-523i was also upgraded, thank you very much for the assistance of rjahl, the final version of Z4 is really great.

Hi all!
New to the forums but took a read thru all of this amazing forum you guys have going on!
It’s a shame I don’t know more about tuning but I’d love to try to install another Disa on my Canadian 2006 323i!
Anyways it was a pleasure reading through this forum I learnt quite a lot!

[dindf]

Originally Posted by DoomerDan

Hi all!
New to the forums but took a read thru all of this amazing forum you guys have going on!
It’s a shame I don’t know more about tuning but I’d love to try to install another Disa on my Canadian 2006 323i!
Anyways it was a pleasure reading through this forum I learnt quite a lot!

According to some of the things we talked about and the solutions, you should not encounter many obstacles.

[dindf]

To rjahl:PIC

[dindf]

TO rjahl INPA