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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 01-21-2014, 10:38 AM   #1
Ft1219
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EU2 tune/flash

Is there anyone in the NC area that can EU2 flash my car? (I'm running BB Catless headers) I know there are many threads on how to DIY but I'm just not feeling comfortable/confident doing it. Can anyone help me out?


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Old 01-22-2014, 02:44 AM   #2
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not trying to hijack the thread, but if someone in the mid atlantic area able to do this, i'm looking for the same thing. thanks
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Old 01-24-2014, 07:57 PM   #3
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Got it tuned by CESmotorsports in Charlotte. Problem solved


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Old 01-24-2014, 08:08 PM   #4
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How much?
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Old 01-25-2014, 01:12 PM   #5
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how much?
+1
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Old 01-25-2014, 01:44 PM   #6
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$704.10.


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Old 01-25-2014, 05:03 PM   #7
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^ Lol, absolute fail. EU2 tune isn't even $50...
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Old 01-25-2014, 08:51 PM   #8
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It was a AA tune with rear o2 sensor delete! Dumbass


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Old 01-25-2014, 08:56 PM   #9
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It was a AA tune with rear o2 sensor delete! Dumbass


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Congratz, fix your title den dumaz


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Old 01-25-2014, 09:14 PM   #10
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Go on somewhere.


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Old 01-26-2014, 12:34 AM   #11
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pretty expensive, but to be fair there are only a few power mods on e46 non-ms before going FI, and a proper tune can make the power delivery better in many areas, not just power. Do you feel a difference? did they happen to give you a before and after dyno? i assume for $704 it was a custom dyno tune?
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Old 02-05-2014, 12:55 PM   #12
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I am in Christiansburg, VA...I flashed my personal vehicle with EU2 and would be willing to do someone else's as well as update any modules on the car. 2.5 hours from Charlotte, NC.
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Old 02-05-2014, 04:44 PM   #13
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I am in Christiansburg, VA...I flashed my personal vehicle with EU2 and would be willing to do someone else's as well as update any modules on the car. 2.5 hours from Charlotte, NC.
Are you constantly using 93? Or lower. I usually use 89 every fill up.


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Old 02-05-2014, 05:20 PM   #14
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Are you constantly using 93? Or lower. I usually use 89 every fill up.


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Why would you run 89? BMW recommends premium for a reason.. I use 93 every time I fill up


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Old 02-05-2014, 07:33 PM   #15
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I never felt a difference with 93 vs 89.


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Old 02-06-2014, 01:36 AM   #16
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Are you constantly using 93? Or lower. I usually use 89 every fill up.


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I have never put anything but 93 octane in my BMW; our cars were designed for high octane as they are performance oriented. A lot of people do NOT know/understand running a lower octane fuel than that which is required by BMW and other makers (perhaps in an effort to save $) is saving you very little money, nothing at all, or even possibly costing you more. BMW literally designs all of their motors to run on 91 octane. Fact.

The lower octane fuel burns faster and is more prone to detonation and thus detonation will occur (knocking). The DME (ECU), senses the knocking and starts pulling timing and dumping fuel to prevent further knocking = LOSS OF POWER AND FUEL EFFICIENCY. As time progresses, the DME will learn and adjust the different values to run optimally on the low octane gasoline BUT still at a loss of power/MPG. Are there big losses?..NO. If your E46 is N/A (naturally aspirated) you shouldn't lose but maybe a few ponies definitely <10 BUT if you've got F/I (forced induction) than you'd see larger losses. There are other factors (ambient temp, driving habits, etc.) which would increase/decrease knocking associated with using lower octane fuel and therefore also affect losses.

If your driving a BMW, with almost complete certainty I can tell you lower octane fuel is not going to hurt your motor or anything else...except your ego when you get spanked by a Prius (kidding). BMW's have really good knock sensors/DME/software and the DME has the ability to completely adjust what it needs to, to run optimally. This is not the case for all car manufacturers. Example: some GM vehicles can not fully adjust the fuel and ignition timing to completely stop detonation from crap gasoline and though it's minimal, it'll slowly destroy the motor.
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Old 02-06-2014, 05:18 AM   #17
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Originally Posted by vlcmstnsct View Post
I have never put anything but 93 octane in my BMW; our cars were designed for high octane as they are performance oriented. A lot of people do NOT know/understand running a lower octane fuel than that which is required by BMW and other makers (perhaps in an effort to save $) is saving you very little money, nothing at all, or even possibly costing you more. BMW literally designs all of their motors to run on 91 octane. Fact.

The lower octane fuel burns faster and is more prone to detonation and thus detonation will occur (knocking). The DME (ECU), senses the knocking and starts pulling timing and dumping fuel to prevent further knocking = LOSS OF POWER AND FUEL EFFICIENCY. As time progresses, the DME will learn and adjust the different values to run optimally on the low octane gasoline BUT still at a loss of power/MPG. Are there big losses?..NO. If your E46 is N/A (naturally aspirated) you shouldn't lose but maybe a few ponies definitely <10 BUT if you've got F/I (forced induction) than you'd see larger losses. There are other factors (ambient temp, driving habits, etc.) which would increase/decrease knocking associated with using lower octane fuel and therefore also affect losses.

If your driving a BMW, with almost complete certainty I can tell you lower octane fuel is not going to hurt your motor or anything else...except your ego when you get spanked by a Prius (kidding). BMW's have really good knock sensors/DME/software and the DME has the ability to completely adjust what it needs to, to run optimally. This is not the case for all car manufacturers. Example: some GM vehicles can not fully adjust the fuel and ignition timing to completely stop detonation from crap gasoline and though it's minimal, it'll slowly destroy the motor.
Interesting.. I've got some change to come


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Old 02-06-2014, 05:33 AM   #18
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I never felt a difference with 93 vs 89.


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It's not about "feeling" a difference. It's better for your engine. You wouldn't "feel" a difference if you put vegetable oil in your engine instead of motor oil. But I'm willing to bet we both know that your engine would definitely be worse because of it.


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Old 02-06-2014, 05:48 AM   #19
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I am in Christiansburg, VA...I flashed my personal vehicle with EU2 and would be willing to do someone else's as well as update any modules on the car. 2.5 hours from Charlotte, NC.
I might have to take you up on this in the Spring...I'm running headers and removed the SAP...I'm assuming there is little to no risk of it not running or running right?...of course I'd be driving it there and would like to drive it back
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Old 02-06-2014, 10:46 AM   #20
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Just keep in mind that an ecu brick can happen. in this case its not very likely your driving it back
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