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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > All COBB Tuning AccessPORT Flash for N54 335i Discussion Here



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      08-29-2011, 10:48 AM   #2267
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they make up for it with some pretty advanced timing
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      08-29-2011, 11:13 AM   #2268
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Quote:
Originally Posted by mithiral67 View Post
they make up for it with some pretty advanced timing
Not really, the stock tune actually has more timing "advance" than that...changing that seems to be the easy part as well as AFR targetting which the flashes do the best in terms of tuning...top end boost definitely poses a significant challenge and I can't wait to see what/how COBB will manage it...
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      08-29-2011, 11:27 AM   #2269
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Well, more than cobbs (only tune I have ran logs with). Forgive my ignorance.
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      08-29-2011, 11:29 AM   #2270
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Originally Posted by mithiral67 View Post
Well, more than cobbs (only tune I have ran logs with). Forgive my ignorance.
well you've run the stock "tune" at first for sure
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      08-29-2011, 11:45 AM   #2271
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Quote:
Originally Posted by dzenno View Post
Not really, the stock tune actually has more timing "advance" than that...changing that seems to be the easy part as well as AFR targetting which the flashes do the best in terms of tuning...top end boost definitely poses a significant challenge and I can't wait to see what/how COBB will manage it...
I don't think GIAC or any flash tuner has any issue with top end boost. They just tune the engine at the limit of detonation (probably a bit safer than that) for a given octane, and that combination of boost and advance they found to be the maxium knock-free combination. I don't think you can run high boost and high ignition advance at the same time at that RPM. With piggybacks they can raise the boost to like 16psi on top but the ECU pulls the ignition advance to lower values by detecting knock, I don't think I saw logs with 16psi on top and 14 degrees of advance (with pump gas).
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      08-29-2011, 11:54 AM   #2272
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Quote:
Originally Posted by tscdennab View Post
I don't think GIAC or any flash tuner has any issue with top end boost. They just tune the engine at the limit of detonation (probably a bit safer than that) for a given octane, and that combination of boost and advance they found to be the maxium knock-free combination. I don't think you can run high boost and high ignition advance at the same time at that RPM. With piggybacks they can raise the boost to like 16psi on top but the ECU pulls the ignition advance to lower values by detecting knock, I don't think I saw logs with 16psi on top and 14 degrees of advance (with pump gas).
Obviously high boost+high timing+high rpm (i.e. aggressive tuning) requires high octane and the DME will do what its "programmed" to do or NOT to do as a response to set requested parameters. It is most certainly a challenge for any N54 flash to arbitrarily raise boost past 5300rpm, it is not easy at all from what I've seen with a Stage 3 alpha map I'm testing. They are working on it and I'm sure they'll figure it out but its not simple at all like it is with the piggies. Some of the logic is buried deep into the N54 ROM and requires a significant amount of time and wizardry almost to find and reprogram. Its easy enough to raise load to stock+X but there are many things to take into account as the rest of the DME logic will just tell your settings to F* off and close the throttle blade not allowing that boost to go through to the engine...Digging out the "why" is the tricky part

To you I'd suggest not making bold assumptions like that especially when they're incorrect...having said that, i've been guilty of the same in the past so I'm also working on it
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      08-29-2011, 11:57 AM   #2273
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Quote:
Originally Posted by BMWsky View Post
Like in the other thread, it is a perfectly harmless code. Everyone who has Cobb installed throws this code unless you've installed the new v3 Beta map. No need to worry about it, you're fine.


THANK YOU VERY MUCH!!! Glad to hear it.
But i ve got another problem now, yesterday i've tried 93 oct v203 v2 map and got fuel pump plausibility code! And the i-drive started to show 4:4,dsc,ebd,awd malfunction! So i got back to 91 oct and everything was ok!

Anyone experienced the same???
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      08-29-2011, 12:01 PM   #2274
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Originally Posted by bmwm3redblack View Post
THANK YOU VERY MUCH!!! Glad to hear it.
But i ve got another problem now, yesterday i've tried 93 oct v203 v2 map and got fuel pump plausibility code! And the i-drive started to show 4:4,dsc,ebd,awd malfunction! So i got back to 91 oct and everything was ok!

Anyone experienced the same???

Yes...with that exact same map. I cleared the code, went to 2.02 v2 map and went to the track last week...no problems. I got home and flashed the 3.0 maps and bingo...fuel pump code. I don't get it with any of the 2.02 maps, just 2.03 and 3.0. Weird.
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      08-29-2011, 12:09 PM   #2275
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Quote:
Originally Posted by dzenno View Post
Obviously high boost+high timing+high rpm (i.e. aggressive tuning) requires high octane and the DME will do what its "programmed" to do or NOT to do as a response to set requested parameters. It is most certainly a challenge for any N54 flash to arbitrarily raise boost past 5300rpm, it is not easy at all from what I've seen with a Stage 3 alpha map I'm testing. They are working on it and I'm sure they'll figure it out but its not simple at all like it is with the piggies. Some of the logic is buried deep into the N54 ROM and requires a significant amount of time and wizardry almost to find and reprogram. Its easy enough to raise load to stock+X but there are many things to take into account as the rest of the DME logic will just tell your settings to F* off and close the throttle blade not allowing that boost to go through to the engine...Digging out the "why" is the tricky part

To you I'd suggest not making bold assumptions like that especially when they're incorrect...having said that, i've been guilty of the same in the past so I'm also working on it
My thoughts were based on what power can the piggybacks (at their stock settings) obtain compared to flashes. If you take a stock JB4 it makes the same power as the GIAC Stage 2 even on the highest maps, with the boost and ignition curves very similar (I checked this with a friend of mine). Of course, this can be altered with bypassing safety resistors, etc. but to me it means that BMS found out that those boost/ignition settings are the highest safe settings, after years of playing with the N54 engine. It's probably not a coincidence that GIAC found out the same settings as being optimal.
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      08-29-2011, 12:21 PM   #2276
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Quote:
Originally Posted by tscdennab View Post
My thoughts were based on what power can the piggybacks (at their stock settings) obtain compared to flashes. If you take a stock JB4 it makes the same power as the GIAC Stage 2 even on the highest maps, with the boost and ignition curves very similar (I checked this with a friend of mine). Of course, this can be altered with bypassing safety resistors, etc. but to me it means that BMS found out that those boost/ignition settings are the highest safe settings, after years of playing with the N54 engine. It's probably not a coincidence that GIAC found out the same settings as being optimal.
Not talking power at all, i'm talking boost at top end...think we're talking about different things here...let's move on..
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      08-29-2011, 01:18 PM   #2277
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Quote:
Originally Posted by bmwm3redblack View Post
THANK YOU VERY MUCH!!! Glad to hear it.
But i ve got another problem now, yesterday i've tried 93 oct v203 v2 map and got fuel pump plausibility code! And the i-drive started to show 4:4,dsc,ebd,awd malfunction! So i got back to 91 oct and everything was ok!

Anyone experienced the same???


how did you like v203 v2 map btw?
I put it on yesterday (went from v203 91 octane map), and I'm not feeling it. Prefer the v203 93 map over v2. Boost coming up much later in pedal travel; good for city driving and perhaps mileage, but the more aggressive onset later on in pedal travel doesn't feel natural. Not linear enough.
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      08-29-2011, 03:13 PM   #2278
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Quote:
Originally Posted by BMWsky View Post
Yes...with that exact same map. I cleared the code, went to 2.02 v2 map and went to the track last week...no problems. I got home and flashed the 3.0 maps and bingo...fuel pump code. I don't get it with any of the 2.02 maps, just 2.03 and 3.0. Weird.
Nice to hear that i was afraid i'm the only one!!
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      08-29-2011, 03:21 PM   #2279
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Originally Posted by bmwm3redblack View Post
Nice to hear that i was afraid i'm the only one!!
I'm wondering if it truly is the FP or if others are experiencing the same issues. When I threw the CEL and "reduced power" warning, I turned off the car, cleared the code, changed the tune and drove the heck out of the car with no issues. It only acts up when I start up the car, not when I've been driving it around and only on the 2.03 v2 and Beta 3.0 maps. Doesn't do it stock or on the 2.02 maps. Weird.

I took it to an indy shop owned by a former BMW Master Tech and he couldn't find anything wrong. I suppose I could have BMW do a leakdown test for some peace of mind, but don't want to pay for it...guess I'm not that desperate yet.
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      08-29-2011, 09:16 PM   #2280
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Sweet I had Cobb AP on my Evo, since I traded it in for the 335i happy to know that you guys are also supporting the n54 platform. Can't wait to save enough money to be able to get me one.
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      08-29-2011, 10:25 PM   #2281
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I posted some videos earlier in this thread about waste gate rattle only when Cobb was installed. I'm happy to report all issues are gone with the august firmware change

Thank you Cobb




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      08-30-2011, 08:15 AM   #2282
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Quote:
Originally Posted by BMWsky View Post
I'm wondering if it truly is the FP or if others are experiencing the same issues. When I threw the CEL and "reduced power" warning, I turned off the car, cleared the code, changed the tune and drove the heck out of the car with no issues. It only acts up when I start up the car, not when I've been driving it around and only on the 2.03 v2 and Beta 3.0 maps. Doesn't do it stock or on the 2.02 maps. Weird.

I took it to an indy shop owned by a former BMW Master Tech and he couldn't find anything wrong. I suppose I could have BMW do a leakdown test for some peace of mind, but don't want to pay for it...guess I'm not that desperate yet.
At first i was thinking that my hpfp gone,but after i reinstalled tune everything was allright even during hard accelerations

Don't wanna by new hpfp... Do you know how much is it?
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      08-30-2011, 08:56 AM   #2283
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Originally Posted by bmwm3redblack View Post
At first i was thinking that my hpfp gone,but after i reinstalled tune everything was allright even during hard accelerations

Don't wanna by new hpfp... Do you know how much is it?
It's covered under warranty for 10 years or 120,000 miles.
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      08-30-2011, 09:33 AM   #2284
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Quote:
Originally Posted by Tyler0630 View Post
I posted some videos earlier in this thread about waste gate rattle only when Cobb was installed. I'm happy to report all issues are gone with the august firmware change

Thank you Cobb

Nice! My AP should be delivered by Thursday and I was pretty concerned about the waste gates rattling. I can't wait to get this installed
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      08-30-2011, 11:00 AM   #2285
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Just curious, what throttle maps are most people using? Has anyone tried all 3 versions for comparison.

I'm planning to switch from Dinan stg 2 to Cobb and am wondering which map would provide the same type of smooth throttle response.
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      08-30-2011, 12:40 PM   #2286
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Quote:
Originally Posted by tomob63 View Post
how did you like v203 v2 map btw?
I put it on yesterday (went from v203 91 octane map), and I'm not feeling it. Prefer the v203 93 map over v2. Boost coming up much later in pedal travel; good for city driving and perhaps mileage, but the more aggressive onset later on in pedal travel doesn't feel natural. Not linear enough.
I like v203 v2 map it's aggressive enough and i like the feeling of boost coming!!!
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      08-30-2011, 04:17 PM   #2287
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@ nitehawk, map 2.03 v2 alternate throttle map will give you the linear power delivery you are looking for. With that said, map 3.00 is great!
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      08-30-2011, 04:18 PM   #2288
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Originally Posted by JStang View Post
Nice! My AP should be delivered by Thursday and I was pretty concerned about the waste gates rattling. I can't wait to get this installed
As many have stated, map 3.00 for me has also silenced the wastegate rattles (but I barely noticed in the first place)
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