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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > n55 AR design DP / Dyno and video



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      01-30-2011, 07:55 PM   #1
ciomas
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n55 AR design DP / Dyno and video

So it finally arrived last week after almost 8 weeks of waiting (wonder if many have been shipped to europe so far). Again big thanks to AR for the jewelery like craftsmaship - the welds are trully sublime. Even my SA has been very impressed when he first saw it and then again with the fitment after they installed it for me. Needless to say it took a bit of convincing (and a good skotch) before he agreed to do it so my warranty would not be voided.

The instalation took about 4 hours and didnt cause any problems. The O2 sensor has been installed in a regular manner without any extensions in order to fool it. I do own a BMS CAN tool which I got specificaly for the purpose of clearing codes after the DP install. I havent set the CAN tool to autodelete the codes yet. Been driving catless for almost 4 days now and no error so far!! I find it quite unusual.

Focusing on the performance part of the mod, I have to say it has transfromed the car completely. It cas given some breath to that lazy twin scroll Car does feel stronger and revs faster especialy in the low end. I let the dyno speak for itself. Im not sure about the dyno itself as I was trying to find something in my city on a very short notice but at the end of the day I was mostly interested in the delta. First two runs were done one day prior to instalation. The only mods present were the RPI scoops and HP Air filter. I Returned the following day after the instalation - same weather conditions. Biggest gain can be seen on the torgue curve and it reaches 30Nm / ca 22 lb/ft (the magic n55 dip is also present ofcourse). First graph shows all runs from both days, and in the second one I only left the second run from day one and the second run from day two.


The only downside is the gas consumption. Ive spoken to some people abbout it and dont seem to be able to get a clear answer. Im not sure if a stock ECU with no tune would in any way adapt to the modifiction. During the first day of driving the increase was enormous. It jumped from 14-15 l/100km to 20-22 l/100km. I couldnt believe what i was seeing. I do take into consideration that I was reving the car much higher at the beginnig just because it sounded so damn good after four days of driving Im getting ca 17-18 l/100km. If someone could elaborate on that I would be very grateful.

Oh yes, and the sound.....my god it screems! Im running the downpipe with a stock exhaust which on a e92 means no cats in the entire system. It has that pure metalic sound. Sounds like its comming from the engie, not a bassy tuned exhaust. But it is loud, in a good way

a couple of pics and videos:

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Last edited by ciomas; 01-30-2011 at 08:25 PM.
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      01-30-2011, 08:02 PM   #2
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Awesome man mines comes in Wednesday I cant wait to get it on !
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      01-30-2011, 08:18 PM   #3
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Damn that sounds good!
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I have exhaust and an intake...
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      01-30-2011, 08:49 PM   #4
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sounds really nice! Awesome
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      01-30-2011, 10:57 PM   #5
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sounds good... ar design ftmfw!!
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      01-30-2011, 11:00 PM   #6
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ahhh i can't read this dyno lol... So how much hp did you gain? and how much TQ?
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      01-31-2011, 03:21 AM   #7
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Werd dyno is a little cluttered..
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      01-31-2011, 05:23 AM   #8
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can someone comment on the fuel consumption?
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      01-31-2011, 11:51 AM   #9
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Quote:
Originally Posted by shockin330i View Post
Werd dyno is a little cluttered..
Yes very, i don't see much of a "GAIN" at all...
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      01-31-2011, 11:58 AM   #10
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Quote:
Originally Posted by ciomas View Post
During the first day of driving the increase was enormous. It jumped from 14-15 l/100km to 20-22 l/100km. I couldnt believe what i was seeing. I do take into consideration that I was reving the car much higher at the beginnig just because it sounded so damn good after four days of driving Im getting ca 17-18 l/100km. If someone could elaborate on that I would be very grateful.
You're getting this kind of consumption from a N55? Wow. I mean, wow! Just for a comparison, with my fully modded N54 I'm consuming 11l/100km when I drive normally, 13l/100km in the city and 13.5l/100km when I drive rather fast on the Autobahn. Consumption above that is reserved for driving on the 'Ring or Vmax runs. I've never had 17-18, let alone 20-22l/100km.

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      01-31-2011, 12:04 PM   #11
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Quote:
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Yes very, i don't see much of a "GAIN" at all...
I would have to agree, but nice sound though lol
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      01-31-2011, 02:12 PM   #12
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well, untill I get a remap I wouldnt count on big gains. So far the gain only really happens before 2.5k rpm and its all torgue, not much hp. But it is a dfferent car now, the reaction time is drastically shorter.
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      01-31-2011, 06:36 PM   #13
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By reading the graph, there really is no gain, looks like the power is coming on a tad sooner. He lost a few HP and gained only a little TQ. Similar results to what I had. Looks like this thing is in need of some fine tuning to make power with.
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      01-31-2011, 06:39 PM   #14
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he has NO tune.
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      01-31-2011, 06:49 PM   #15
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Quote:
Originally Posted by jjurroz View Post
he has NO tune.
I know that. Im saying, once the tuners get complete fuel control, we will see some gains from this DP. Tune or no tune, nobody is seeing gains so far.
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      01-31-2011, 06:54 PM   #16
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Quote:
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I know that. Im saying, once the tuners get complete fuel control, we will see some gains from this DP. Tune or no tune, nobody is seeing gains so far.
Except the flash tune... running max 12psi and tappers down to 9ish. Put down 320hp and like 370tq
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      01-31-2011, 06:57 PM   #17
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Quote:
Originally Posted by shockin330i View Post
Except the flash tune... running max 12psi and tappers down to 9ish. Put down 320hp and like 370tq

Was this with a DP or tune only?
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      01-31-2011, 07:06 PM   #18
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Quote:
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Was this with a DP or tune only?
Tune only!!!
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      01-31-2011, 07:17 PM   #19
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Very nice, now they need to get ahold of an AR DP and see what they can do to lay this issue to rest
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      01-31-2011, 07:19 PM   #20
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The fuel consumption improvement comes from an improved volumetric efficiency of the system. The exhaust is freer flowing and the engine breathes better so it is more efficient and uses less fuel for general cruising. It's exactly the same thing as guys getting better mileage from an intake.
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      02-01-2011, 06:45 AM   #21
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Quote:
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The fuel consumption improvement comes from an improved volumetric efficiency of the system. The exhaust is freer flowing and the engine breathes better so it is more efficient and uses less fuel for general cruising. It's exactly the same thing as guys getting better mileage from an intake.
the fuel consumption got much worse.

Anyways, going to Warsaw on friday. Made an appontment with a flash tuning company. Gonna drop the car off for a whole day in their shop/dyno. We'll see if they can work something out
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      02-01-2011, 06:48 AM   #22
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Quote:
Originally Posted by Juiced46 View Post
By reading the graph, there really is no gain, looks like the power is coming on a tad sooner. He lost a few HP and gained only a little TQ. Similar results to what I had. Looks like this thing is in need of some fine tuning to make power with.
have a look at the second graph (it shows second run from day 1 and second run from day 2), the low end got at least 20Nm stronger with no tune - like youre saying, there is hope, especialy with a flash tune
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