Dynoed with N55 AR Downpipe before/after

shockin330i · 01-23-2011, 05:28 PM

Quote:

Originally Posted by themyst

So basically we can conclude that downpipes aren't worth the money on an N55. I am really disappointed in the power potential on this platform in comparison to what the N54 guys accomplish.

Well not really. If you look at both terry's and shiv's stock baseline, they both baselined 27xhp and 29xtq

If we say that is my same baseline(although I'd think mine would be lower due to being AT vs 7DCT) Then you could conclude that I gained about 10whp and over 30tq from stock.

shockin330i · 01-23-2011, 05:31 PM

Here's the afr with the procede map 1

BrianMN · 01-23-2011, 05:33 PM

Quote:

Originally Posted by shockin330i

Here's the afr with the procede map 1

Dang. If I was running that lean I'd be checking my plugs every month! haha

shockin330i · 01-23-2011, 05:44 PM

Quote:

Originally Posted by BrianMN

Dang. If I was running that lean I'd be checking my plugs every month! haha

Maybe I should do that... been going into limp mode a lot lately...

Juiced46 · 01-23-2011, 06:33 PM

Mine was that lean stock and is the same tuned. In the graph were it skyrockets lean the sensor slipped off the exhaust.

Mike@N54Tuning.com · 01-23-2011, 06:55 PM

Quote:

Originally Posted by Juiced46

Mine was that lean stock and is the same tuned. In the graph were it skyrockets lean the sensor slipped off the exhaust.

None of the N55 tunes have any control over the air/fuel ratio which is why BMS runs +2.75psi with their Stage1 tuning.

Mike

Pepe_pr · 01-23-2011, 06:59 PM

no more mods for me until someone figures out this N55, I decided to stay with JB, so i hope I get some stage 2 or something soon. I am not mad, but definitively not happy with those results.

shockin330i · 01-23-2011, 07:00 PM

If you're going to wait for stage 2, you're going to be waiting awhile....

BrianMN · 01-23-2011, 07:08 PM

Quote:

Originally Posted by Mike@N54Tuning.com

None of the N55 tunes have any control over the air/fuel ratio which is why BMS runs +2.75psi with their Stage1 tuning.

Mike

So you're saying neither the JB3 nor PROcede N55 tunes are able to control A/F right now? Does that mean no control over fuel, or calling for enrichment at more boost? If so, how can you raise boost and make no other changes in fueling? It just doesn't make sense.

How sure are you about this?

Forcefed3 · 01-23-2011, 07:13 PM

[QUOTE=ar design;8750269][QUOTE=Juiced46;8749048]Went to the dyno yesterday to see what type of gains I got with the N55 AR downpipe. The results were very surprising to say the least. Obviously this was not done on the same day which will affect results slightly.

Mods before AR DP:
JB3 Beta Tune
AMS 3" Catback

Only thing added was the AR Downpipe from the previous dyno session. Also, dont mind on the graph where it says MAP 5, its MAP 1 as the JB3 for the N55 only has one MAP.

Here are the results.i

[img]http://www.efilogics.com/dyno/graph.php?gb=0

shockin330i · 01-23-2011, 07:22 PM

Quote:

Originally Posted by BrianMN

So you're saying neither the JB3 nor PROcede N55 tunes are able to control A/F right now? Does that mean no control over fuel, or calling for enrichment at more boost? If so, how can you raise boost and make no other changes in fueling? It just doesn't make sense.

How sure are you about this?

I guess that's why I keep going into limp mode. Code 14025

Mike@N54Tuning.com · 01-23-2011, 07:24 PM

Quote:

Originally Posted by shockin330i

If you're going to wait for stage 2, you're going to be waiting awhile....

BMS is working on the N55 Stage2 tuning but as some of you guys have seen it's not quite as easy to extract power from this motor without codes and headaches as one would like. Now that the N54 JB4 is released their full focus will be back on N55 tuning.

Mike

Mike@N54Tuning.com · 01-23-2011, 07:26 PM

Quote:

Originally Posted by BrianMN

So you're saying neither the JB3 nor PROcede N55 tunes are able to control A/F right now? Does that mean no control over fuel, or calling for enrichment at more boost? If so, how can you raise boost and make no other changes in fueling? It just doesn't make sense.

How sure are you about this?

That is correct. To alter air/fuel ratio you must intercept the oxygen sensor to bias it and neither tunes wiring harness does. BMS did extensive testing and was comfortable in the +2.75psi range at the stock air/fuel ratio for their Stage1. Analogous to an N54 JB+ or SSTT tune if you will. Stage2 runs higher boost and a much richer air/fuel ratio but is still being developed now.

Mike

BrianMN · 01-23-2011, 07:30 PM

Quote:

Originally Posted by Mike@N54Tuning.com

That is correct. To alter air/fuel ratio you must intercept the oxygen sensor to bias it and neither tunes wiring harness does. BMS did extensive testing and was comfortable in the +2.75psi range at the stock air/fuel ratio for their Stage1. Analogous to an N54 JB+ or SSTT tune if you will. Stage2 runs higher boost and a much richer air/fuel ratio but is still being developed now.

Mike

Hmmm...The procede can read the O2 sensors and display AFR on the dash gauges, but you're saying it can't modify that channel? Unless it's reading AFR from a different method, I don't see how that's possible.

Pepe_pr · 01-23-2011, 07:33 PM

Lol so what other mods can I buy, hahahahA let's just wait in slowness

Mike@N54Tuning.com · 01-23-2011, 07:40 PM

Quote:

Originally Posted by BrianMN

Hmmm...The procede can read the O2 sensors and display AFR on the dash gauges, but you're saying it can't modify that channel? Unless it's reading AFR from a different method, I don't see how that's possible.

The AFR ratio is read through the CAN system like the JB4. And of course the JB4 and procede for N54 include full fuel control (air/fuel ratio & fuel pressure), but the N55 tunes have zero control. The fueling is closed loop so there is little risk of running leaner than stock but that stock ratio does limit how much power you can safely produce.

Mike

cn555ic · 01-23-2011, 07:41 PM

Wow thats not good running that lean....It seems as though the N55 is harder to tune for sure and the limitations it has

shockin330i · 01-23-2011, 07:41 PM

cosmetic stuff?

KyLu II · 01-23-2011, 07:52 PM

Quote:

Originally Posted by cn555ic

Wow gains seemed to be not as much as the N54 DPs.

2>1 lol

ciomas · 01-23-2011, 08:48 PM

Hmm, as Ill be receiving my AR downpipe tomorrow Im a little bit worried. I havent pulled the trigger on a Procede yet but Im asuming we would be able to overcome the problem with a flash remap? Is that correct?

cn555ic · 01-23-2011, 09:00 PM

Quote:

Originally Posted by ciomas

Hmm, as Ill be receiving my AR downpipe tomorrow Im a little bit worried. I havent pulled the trigger on a Procede yet but Im asuming we would be able to overcome the problem with a flash remap? Is that correct?

I think a flash tune for the N55 will take awhile and your best bet if you cant wait is either the Procede or JB tune...

ciomas · 01-23-2011, 09:02 PM

Quote:

Originally Posted by cn555ic

I think a flash tune for the N55 will take awhile and your best bet if you cant wait is either the Procede or JB tune...

remaps are available already, Im just wonderring of it would address the issue.. anyone?

01-23-2011, 05:31 PM	#24
shockin330i Brigadier General 798 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	Here's the afr with the procede map 1 __________________ ERnie 2016 BSM/f80/ZCP
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01-23-2011, 06:33 PM	#27
Juiced46 Major 74 Rep 1,035 Posts Drives: 03 Turbo Cobra, 2011 335xi Join Date: Jun 2010 Location: Wallingford CT iTrader: (3)	Mine was that lean stock and is the same tuned. In the graph were it skyrockets lean the sensor slipped off the exhaust.
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01-23-2011, 06:59 PM	#29
Pepe_pr Lieutenant 35 Rep 553 Posts Drives: 135i black on black Join Date: Sep 2010 Location: San Juan PR iTrader: (1)	no more mods for me until someone figures out this N55, I decided to stay with JB, so i hope I get some stage 2 or something soon. I am not mad, but definitively not happy with those results. __________________ USED TO HAVE A 385 whp 479 tq N55 335 2011 (AT) AND NOW A 135 M package 2010 (AT) 447whp/504tq
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01-23-2011, 07:00 PM	#30
shockin330i Brigadier General 798 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	If you're going to wait for stage 2, you're going to be waiting awhile.... __________________ ERnie 2016 BSM/f80/ZCP
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01-23-2011, 07:13 PM	#32
Forcefed3 Banned 127 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	[QUOTE=ar design;8750269][QUOTE=Juiced46;8749048]Went to the dyno yesterday to see what type of gains I got with the N55 AR downpipe. The results were very surprising to say the least. Obviously this was not done on the same day which will affect results slightly. Mods before AR DP: JB3 Beta Tune AMS 3" Catback Only thing added was the AR Downpipe from the previous dyno session. Also, dont mind on the graph where it says MAP 5, its MAP 1 as the JB3 for the N55 only has one MAP. Here are the results.i [img]http://www.efilogics.com/dyno/graph.php?gb=0
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01-23-2011, 07:33 PM	#37
Pepe_pr Lieutenant 35 Rep 553 Posts Drives: 135i black on black Join Date: Sep 2010 Location: San Juan PR iTrader: (1)	Lol so what other mods can I buy, hahahahA let's just wait in slowness __________________ USED TO HAVE A 385 whp 479 tq N55 335 2011 (AT) AND NOW A 135 M package 2010 (AT) 447whp/504tq
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01-23-2011, 07:41 PM	#39
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Wow thats not good running that lean....It seems as though the N55 is harder to tune for sure and the limitations it has
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01-23-2011, 07:41 PM	#40
shockin330i Brigadier General 798 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	cosmetic stuff? __________________ ERnie 2016 BSM/f80/ZCP
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01-23-2011, 08:48 PM	#42
ciomas Captain 30 Rep 679 Posts Drives: M4 Join Date: Feb 2010 Location: 3city PL iTrader: (0)	Hmm, as Ill be receiving my AR downpipe tomorrow Im a little bit worried. I havent pulled the trigger on a Procede yet but Im asuming we would be able to overcome the problem with a flash remap? Is that correct?
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