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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 06-04-2012, 07:47 PM   #1
hueyhy
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EU2 tuning with stock set up?

I know that EU2 works without catalyst converter and SAP, but how about if I just re-flash the ECU to EU2 but don't do the hardware mods?
will there be any significant improvement or not?
will I run into problems?

thanks!
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Old 06-04-2012, 07:49 PM   #2
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Quote:
Originally Posted by hueyhy View Post
I know that EU2 works without catalyst converter and SAP, but how about if I just re-flash the ECU to EU2 but don't do the hardware mods?
will there be any significant improvement or not?
will I run into problems?

thanks!
Why

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Old 06-04-2012, 07:56 PM   #3
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I don't believe that MS43 DMEs have a EU2 option...only EU3. I deleted my SAP and will be utilizing some of BimmerBrakes Headers as soon as he gets back with a good report for the Gen3 reps. I'm running MS42 EU2 and have zero issues. I haven't had to pass emissions or anything yet so it's no big deal for me until March 2013.
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Old 06-04-2012, 08:00 PM   #4
hueyhy
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Originally Posted by Hornung418 View Post
I don't believe that MS43 DMEs have a EU2 option...only EU3. I deleted my SAP and will be utilizing some of BimmerBrakes Headers as soon as he gets back with a good report for the Gen3 reps. I'm running MS42 EU2 and have zero issues. I haven't had to pass emissions or anything yet so it's no big deal for me until March 2013.
there's no emission inspection in FL either.
so you are running with stock header and EU2 without any issue? sounds great.
How about the performance? Does it really give some improvements you can feel?
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Old 06-04-2012, 08:14 PM   #5
hueyhy
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Originally Posted by Hornung418 View Post
I don't believe that MS43 DMEs have a EU2 option...only EU3. I deleted my SAP and will be utilizing some of BimmerBrakes Headers as soon as he gets back with a good report for the Gen3 reps. I'm running MS42 EU2 and have zero issues. I haven't had to pass emissions or anything yet so it's no big deal for me until March 2013.

http://bmwfans.info/parts/catalog/E4...me_programmed/

here, it shows a EU2 there.
BTW: is that "12 14 7 545 671" the thing am looking for? (my car is a 2002 330i, production date is Jan 2002.)
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Old 06-04-2012, 08:47 PM   #6
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Confused after reading through some threads. Some say EU2 is mainly to delete the CEL lights for aftermarket headers. If don't have the mods, the EU spec tunings are not really making much different.
I think I will try to be safe and don't brick my DME
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Old 06-04-2012, 09:18 PM   #7
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Originally Posted by hueyhy View Post
Confused after reading through some threads. Some say EU2 is mainly to delete the CEL lights for aftermarket headers. If don't have the mods, the EU spec tunings are not really making much different.
I think I will try to be safe and don't brick my DME
Shark it.
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Old 06-05-2012, 04:30 AM   #8
daniel_f.
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Originally Posted by hueyhy View Post
http://bmwfans.info/parts/catalog/E4...me_programmed/

here, it shows a EU2 there.
BTW: is that "12 14 7 545 671" the thing am looking for? (my car is a 2002 330i, production date is Jan 2002.)
Take winkfp and use zsb nummer "7 545 671", flash it, remove secondary air pump (or remove connector) and change part14 to part 13.

http://bmwfans.info/parts/catalog/E4...ttached_parts/

Or even better, use EU2 from Z3 3.0
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Old 06-05-2012, 04:31 PM   #9
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doesnt the SAP help not burn up the cats by leaning out the exhaust on startup? So on a stock setup, this may/may not be a good thing?
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Old 06-05-2012, 08:53 PM   #10
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Where can we get the EU2 software?

Does this have it?

http://www.amazon.com/gp/aw/d/B0055BD4SO
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Old 06-05-2012, 09:07 PM   #11
E46_330i_Stud
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doesnt the SAP help not burn up the cats by leaning out the exhaust on startup? So on a stock setup, this may/may not be a good thing?
Most people delete the sap because they have deleted the cats as well. No need for it anymore. I BELIEVE the SAP actually helps warm the cats up to lower emissions on cold starts BECAUSE the engine is running lean. Could be wrong.
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Old 06-06-2012, 08:23 AM   #12
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Originally Posted by fastjasonbmw View Post
Where can we get the EU2 software?

Does this have it?

http://www.amazon.com/gp/aw/d/B0055BD4SO
You need WinKFP and a usable obd interface.
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Old 06-06-2012, 08:06 PM   #13
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You need WinKFP and a usable obd interface.
Thanks
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Old 06-07-2012, 09:34 AM   #14
sunnyjay
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Engines run rich when they are cold to protect the engine. The sap purpose is to warm up the cat quickly to reduce tailpipe emissions.

On a side note, I had the eu2 tune on my 330ci. It ran perfectly fine on a completely stock m54b30. The reason being is because my sap fail.

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Last edited by sunnyjay; 06-07-2012 at 09:37 AM.
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Old 06-07-2012, 04:33 PM   #15
JDUTHIE
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cool^ thanks for the info
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Old 08-04-2012, 09:28 AM   #16
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Originally Posted by daniel_f. View Post
Take winkfp and use zsb nummer "7 545 671", flash it, remove secondary air pump (or remove connector) and change part14 to part 13.

http://bmwfans.info/parts/catalog/E4...ttached_parts/

Or even better, use EU2 from Z3 3.0
what does part 14 and 13 do?
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Old 08-04-2012, 09:34 AM   #17
daniel_f.
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it separates cylinder 1-3 and 4-6 from each other.
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Old 08-04-2012, 09:38 AM   #18
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is this a requirement to run eu2 tunes?
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Old 08-04-2012, 02:02 PM   #19
daniel_f.
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well, as its supposed to be used and used in stock eu2 setup... i would go for it
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Old 08-04-2012, 03:03 PM   #20
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well, as its supposed to be used and used in stock eu2 setup... i would go for it
sounds good, do you know if this bolt is a hex head or a regular bolt? also is it above the exhaust ports or below? Thanks
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