iCarbon N55 Downpipe Review

Pepe_pr · 11-19-2010, 09:01 AM

Any Check Engine Ligth?? Codes?

HP Autosport · 11-19-2010, 02:35 PM

Here is the result when Berk Technology exhaust(with rear muffler) is added.

Green - Stock
Red - iCarbon Performance catless DP
Blue - The above with Berk Technology Exhaust added

Again, we picked up power everywhere. Max tq is 273.5 and hp is 269.7. In comparison without the Berk exhaust, max tq was 267.8 and hp is 260.7

In stock trim the 135i N55 made 254 tq and 251 hp

Remember this is on a SuperFlow dyno. Dynojet numbers will be higher.

madmanhiker · 11-19-2010, 04:35 PM

I'm liking this more and more!

FrankiE90 · 11-19-2010, 05:18 PM

Quote:

Originally Posted by Pepe_pr

Any Check Engine Ligth?? Codes?

pretty sure there is - that's why you need the CAN tool.

DTMrack.com · 11-19-2010, 11:45 PM

Awesome, you should add that to the OP.

vazbro · 11-24-2010, 04:23 AM

Does this DP will 2011 N55 335xi?

Alpine335TT · 11-24-2010, 12:24 PM

Quote:

Originally Posted by vazbro

Does this DP will 2011 N55 335xi?

pee pee poo poo?

shockin330i · 11-24-2010, 01:27 PM

^Er what?

HP Autosport · 11-24-2010, 04:19 PM

Quote:

Originally Posted by vazbro

Does this DP will 2011 N55 335xi?

That fitment has not been confirmed.

vazbro · 11-24-2010, 06:18 PM

No problem. The AR design one just came out and that one fits N55 XI

Penguino · 12-04-2010, 12:26 PM

It should fit be the XI. I like this much better than the AR.

fly135 · 12-04-2010, 06:57 PM

Quote:

Originally Posted by Matt@Camber-Toe

Have you taken the N55 downpipe off yet? If so you will notice that the backside of the hot housing is nice and open much like a turbo on an N54...the stock downpipe crams down to a little over 2" across the inside...so you are telling me that it's not beneficial for a turbo to open up into the turbine housing, the neck back down at the v band to get out into the open expanse of the downpipe.

And why did mr. 5 gain hp using 3" dps over 2.5s?

I'm not trying to hijack anything, I deal with HP Autowerks all the time and Harold is one of the best people I've ever had the pleasure of talking to and doing business with. I can't knock the fitment of it or the gains of it (18hp is nice), the only thing I'm criticizing is the use of an oem size flange which from the factory is a bottleneck to begin with.

How can the Ar Design downpipe have a larger flange than the icarbon downpipe when they both have to be the same size where they mate up to the turbo? Forgive my ignorance, im just trying to understand. Can someone please explain this to me.

Also, all this talk about size, what are the actual diameters of each pipe?
From what i can understand they are the same, which is as follows:

Ar Design: 4" into 2 x 3". Then reduced to 2 x 2.25" to connect to midpipes
iCarbon: 4" into 2 x 3". Then reduced to 2 x 2.25" to connect to midpipes.

Is this correct? Could someone please clarify this.

vazbro · 12-04-2010, 07:32 PM

Well, HP Autoweks says the fitment of the iCarbon has not been confirmed yet so how long should I wait until somebody confirm it?

MJR63 · 02-27-2011, 10:38 PM

Any word on if the iCarbon fits N55 x-drive?

11-19-2010, 09:01 AM	#67
Pepe_pr Lieutenant 36 Rep 553 Posts Drives: 135i black on black Join Date: Sep 2010 Location: San Juan PR iTrader: (1)	Any Check Engine Ligth?? Codes? __________________ 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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11-19-2010, 02:35 PM	#68
HP Autosport Supreme Allied Commander 4095 Rep 55,888 Posts Drives: F80 M3 Join Date: Mar 2007 Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com iTrader: (36)	Here is the result when Berk Technology exhaust(with rear muffler) is added. Green - Stock Red - iCarbon Performance catless DP Blue - The above with Berk Technology Exhaust added Again, we picked up power everywhere. Max tq is 273.5 and hp is 269.7. In comparison without the Berk exhaust, max tq was 267.8 and hp is 260.7 In stock trim the 135i N55 made 254 tq and 251 hp Remember this is on a SuperFlow dyno. Dynojet numbers will be higher. Attached Images
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11-19-2010, 04:35 PM	#69
madmanhiker Lieutenant Colonel 87 Rep 1,615 Posts Drives: '11 E92 335i Join Date: Jul 2008 Location: Jacksonville, Fl iTrader: (5) Garage List 2011 335i M-Sport [6.00] 2008 328i Sport Pre ... [0.00]	I'm liking this more and more!
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11-19-2010, 11:45 PM	#71
DTMrack.com Major 90 Rep 1,256 Posts Drives: BMW M3 Join Date: Feb 2010 Location: Florida iTrader: (5)	Awesome, you should add that to the OP.
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11-24-2010, 04:23 AM	#72
vazbro Vazbro 25 Rep 242 Posts Drives: 2011 335is Join Date: Jul 2010 Location: Redwood City, CA iTrader: (0)	Does this DP will 2011 N55 335xi?
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11-24-2010, 01:27 PM	#74
shockin330i Brigadier General 807 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	^Er what? __________________ ERnie 2016 BSM/f80/ZCP
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11-24-2010, 06:18 PM	#76
vazbro Vazbro 25 Rep 242 Posts Drives: 2011 335is Join Date: Jul 2010 Location: Redwood City, CA iTrader: (0)	No problem. The AR design one just came out and that one fits N55 XI
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12-04-2010, 12:26 PM	#77
Penguino Lieutenant Colonel 1661 Rep 1,620 Posts Drives: A car. Join Date: Dec 2009 Location: Here iTrader: (5)	It should fit be the XI. I like this much better than the AR. __________________ "Beware of false knowledge; it is more dangerous than ignorance."
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12-04-2010, 07:32 PM	#79
vazbro Vazbro 25 Rep 242 Posts Drives: 2011 335is Join Date: Jul 2010 Location: Redwood City, CA iTrader: (0)	Well, HP Autoweks says the fitment of the iCarbon has not been confirmed yet so how long should I wait until somebody confirm it?
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02-27-2011, 10:38 PM	#80
MJR63 Lieutenant 22 Rep 415 Posts Drives: 2011 335i X-Drive Sedan Join Date: Sep 2010 Location: Tolland, CT iTrader: (5) Garage List 2011 BMW 335i x-drvie [0.00]	Any word on if the iCarbon fits N55 x-drive?
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