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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 | Berk Technology 4" Downpipes w/ DYNO



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      03-31-2011, 08:26 PM   #23
Mike@N54Tuning.com
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Nice gains. You can use the CAN Tool in autodelete mode as a DPFIX. One question though. Why were the stock DP runs done a day after the catless DP runs?

Mike
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      03-31-2011, 10:17 PM   #24
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
Nice gains. You can use the CAN Tool in autodelete mode as a DPFIX. One question though. Why were the stock DP runs done a day after the catless DP runs?

Mike
he dyno'd with stock dp on 25th in US, installed Berk 4" dp...felt gawdyum good haul'd ass back to the past.
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      03-31-2011, 10:34 PM   #25
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Mike
because the stock dp were put on first and dyno'd - my bad.
Berk had to remove the dp then dyno'd the next day early.

Berk want'd to use my base i had from another dyno shop.
Bryan didn't know i dyno somewhere else besides EAS.
which would have skew'd the numbers. It was a good idea
that they base'd at the same shop (EAS). good call.
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      04-01-2011, 06:53 AM   #26
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Any specs on that Berk 1'er? What tune do they have and how much power? Looks like a real sick car.

Nice gains OP, looks like a quality DP!
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      04-01-2011, 07:46 AM   #27
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Quote:
Originally Posted by FrankiE90 View Post

u know i'm making a video.
that cold start is gnarly.

i'm just happy to have a catless DP.
i was feel'n sad and left out for awhile.

i'm tell'n u remove those cats and
amazing happens. If the smell gets to me,
which it hasn't, i'll simply get a used N54 exhaust
and slap that on - it has a set of cats on it.
I can honestly say that those secondary cats take 70% of the smell away! I have yet to idle my car in a drive through and actually smell something. I would idle my car in the garage with the same smell as it was catted.

Frankie, I have the exact stock exhaust as a n54 it seems so it should fit yours.
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      04-01-2011, 09:18 AM   #28
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HAHAHA go buy a prius

Quote:
Originally Posted by maxnix View Post
Quote:
Originally Posted by Brey335i View Post
Those gains seem small. I thought you got more power from the n55 with a catless downpipe
And hardly worth adding the additional pollutants to the air for a small gain only at WOT.
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      04-01-2011, 09:57 AM   #29
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Quote:
Originally Posted by N55 Power View Post
HAHAHA go buy a prius

Quote:
Originally Posted by maxnix View Post
Quote:
Originally Posted by Brey335i View Post
Those gains seem small. I thought you got more power from the n55 with a catless downpipe
And hardly worth adding the additional pollutants to the air for a small gain only at WOT.
Werd... Here comes the tree huggers!!!
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      04-01-2011, 02:12 PM   #30
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Quote:
Originally Posted by maxnix View Post
And hardly worth adding the additional pollutants to the air for a small gain only at WOT.
so ur say'n if it were more gains, then it would be okay?
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      04-02-2011, 10:15 AM   #31
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Quote:
Originally Posted by Sloppy View Post
I can honestly say that those secondary cats take 70% of the smell away! I have yet to idle my car in a drive through and actually smell something. I would idle my car in the garage with the same smell as it was catted.

Frankie, I have the exact stock exhaust as a n54 it seems so it should fit yours.
do you have the whole n54 exhaust? mufflers and piping?

where are the cats located on the n54?

I like this option, as opposed to catting the downpipe
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      04-02-2011, 11:43 AM   #32
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The n55 xdrive comes with the n54 exhaust which has secondary cats just in front of the rear wheels. A small cat on each pipe. Works great and sounds amazing and smells less
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      04-02-2011, 12:33 PM   #33
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Thanks for the write up Frankie. Looking forward to hearing the soundclips!!
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      04-02-2011, 12:41 PM   #34
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      04-02-2011, 12:56 PM   #35
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saw the berk 1 series at SEMA last year, so amazing, they do some of the best work.
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      04-03-2011, 01:27 PM   #36
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Hey Bryan, same here.
Crew? More like good friends.
Never thought of calling ourselves as
a crew.

Thanks again for developing
for the n55 platform. The dynos
helped clear up some unanswered
Questions for me.





Quote:
Originally Posted by slapmyfro View Post
Quote:
Originally Posted by Sloppy View Post
I can honestly say that those secondary cats take 70% of the smell away! I have yet to idle my car in a drive through and actually smell something. I would idle my car in the garage with the same smell as it was catted.

Frankie, I have the exact stock exhaust as a n54 it seems so it should fit yours.
do you have the whole n54 exhaust? mufflers and piping?

where are the cats located on the n54?

I like this option, as opposed to catting the downpipe
Like sloppy said. Cats are on the mid section - I believe they're 600cel cats. I believe u can get high flow cats that are 200cel or 400cel. Choose ur poison.
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      09-08-2011, 02:34 PM   #37
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berk catless DP hold'n up very strong after 5 months of
daily road use.

beat it up every day.

sometimes, i'll put it on MAP 0 of the procede and
drive nuts with it. CAI intake and DP raw without
turbos.

single turbo + catless dp sounds amazing.
Berk ftw.
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      09-08-2011, 03:02 PM   #38
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Quote:
Originally Posted by FrankiE90 View Post
berk catless DP hold'n up very strong after 5 months of
daily road use.

beat it up every day.

sometimes, i'll put it on MAP 0 of the procede and
drive nuts with it. CAI intake and DP raw without
turbos.

single turbo + catless dp sounds amazing.
Berk ftw.
I'm picking up my berk 4" catless dp tomorrow! I got approval from the wife
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      09-08-2011, 03:12 PM   #39
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Quote:
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I'm picking up my berk 4" catless dp tomorrow! I got approval from the wife
Yee buddy. Sticking with the 4 inch.
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      09-08-2011, 04:02 PM   #40
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Yee buddy. Sticking with the 4 inch.
I love my Berk Dp!
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      09-08-2011, 04:25 PM   #41
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Yee buddy. Sticking with the 4 inch.
Yeah man. It will be better for the turbo and of course the JB4 Stage 2

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Originally Posted by eyim1988 View Post
I love my Berk Dp!
Frankie did a fantastic write up on it which inspired me to pick one up. Therefore I know I will love it as well
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      01-30-2012, 03:59 PM   #42
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Can u post a video of the sound? I'm looking to get a Berk 4" downpipe too but I just dont know how it will sound with a stock exhaust
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      01-31-2012, 01:23 AM   #43
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Quote:
Originally Posted by jzingerman View Post
Can u post a video of the sound? I'm looking to get a Berk 4" downpipe too but I just dont know how it will sound with a stock exhaust
2nd vid from the link.
it's not stock exhaust, but will give u an idea.
sounds very aggressive.
u'll get the grunt - even with stock exhaust.
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      01-31-2012, 10:41 AM   #44
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Quote:
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2nd vid from the link.
it's not stock exhaust, but will give u an idea.
sounds very aggressive.
u'll get the grunt - even with stock exhaust.

I can't find the link
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