CP-E 5" Catless Downpipe for N55

turugara · 10-06-2011, 09:26 PM

Initial Thoughts
________________________________________________

I recently had the opportunity to offer my N55 335i to be Custom Performance Engineering's test platform for their 5" Catless downpipe.
5" I said? Madness. Impossible.
SO I went down to headquarters in Beltsville, MD and called their bluff.

Lo and behold... here it was

This is me with the catless DP in front of my face.

After a day of dyno runs with baselines, JB4 Stage 2 Map 1, Map 2, WOT pulls.....

We have a bunch of pictures, video, and data.

Dyno's
________________________________________________

A 70MPH fan was used. 3 pulls were done for consistency for each test.

Dyno #1: Stock Baseline vs Stock + DP

Dyno #2: JB4 Stage 2 Map 1 12.5 PSI VS Same tune + DP

Dyno #3: JB4 Stage 2 Map 2 14 PSI vs Stock tune Baseline

Pictures
________________________________________________

MORE TO COME SOON!

Many thanks to Mike @ VAC for the hookup!

nkadisha · 10-06-2011, 09:27 PM

Let's see the dynos!

CPWINCH · 10-06-2011, 09:31 PM

that sounds amazing! 5inch is to rediculous tho and i think unecassary. just adds weight

what exhaust do u have

turugara · 10-06-2011, 09:36 PM

Quote:

Originally Posted by CPWINCH

that sounds amazing! 5inch is to rediculous tho and i think unecassary. just adds weight

what exhaust do u have

Vishnu Catback Exhaust.

I am not qualified to answer the 3.5" vs 4" vs 5" DP question so I'll let anyone with more knowledge handle it. I just know that there was a significant difference between baseline stock vs stock + 5" DP. Whether this difference is greater than what can be achieved with other brand's DP's of various sizes, idk.

CJ421 · 10-06-2011, 09:39 PM

Wow that is friggin' ridiculous!!

I cannot wait to see this in person.

CPWINCH · 10-06-2011, 09:39 PM

Quote:

Originally Posted by turugara

Vishnu Catback Exhaust.

I am not qualified to answer the 3.5" vs 4" vs 5" DP question so I'll let anyone with more knowledge handle it. I just know that there was a significant difference between baseline stock vs stock + 5" DP. Whether this difference is greater than what can be achieved with other brand's DP's of various sizes, idk.

oh there will definantly be gains. justt as much as 3.5 and 4

turugara · 10-06-2011, 09:46 PM

Quote:

Originally Posted by CPWINCH

oh there will definantly be gains. justt as much as 3.5 and 4

We dyno'ed all day. Just waiting on getting all the graphs sorted out, sent to me, so I can post. I think baseline on the mustang dyno was ~255hp.

mrj25 · 10-06-2011, 10:10 PM

that downpipe is on roids! sounds good though...i'm curious to see the dynos on it.

ian2002525 · 10-07-2011, 12:00 AM

doesn't hear turbo spool though...

turugara · 10-07-2011, 12:14 AM

Quote:

Originally Posted by ian2002525

doesn't hear turbo spool though...

GoPro didn't capture it. In real life you hear the turbo spool like no other. Compared against a friend's AR 4" + Performance Exhaust N55, its much more noticeable with the CP-E 5" + Vishnu Catback combo. That's something that will require a better camera + mic setup to capture or your just going to have to take my word for it. Better yet, visit Philly!

shockin330i · 10-07-2011, 03:05 AM

subscribing

Slops · 10-07-2011, 04:56 AM

Thas a huge bitch lol!!!

FrankiE90 · 10-07-2011, 07:12 AM

that DP looks like a little happy fat kid.
give him some cake.
5" -
did u ask them for a turbo upgrade

always good to see new mods for the N55.

Pepe_pr · 10-07-2011, 09:09 AM

its huge!!! lets see the Dyno sheets!!

turugara · 10-07-2011, 09:23 AM

Quote:

Originally Posted by FrankiE90

did u ask them for a turbo upgrade

I did. Told them I'd be down to try that too.

CJ421 · 10-07-2011, 10:16 AM

Quote:

Originally Posted by turugara

GoPro didn't capture it. In real life you hear the turbo spool like no other. Compared against a friend's AR 4" + Performance Exhaust N55, its much more noticeable with the CP-E 5" + Vishnu Catback combo. That's something that will require a better camera + mic setup to capture or your just going to have to take my word for it. Better yet, visit Philly!

ar design · 10-07-2011, 11:08 AM

Looks like a really nice piece. 4" will support well over 1000whp with ease, not sure what the point of 5" is but...

IancoleTX · 10-07-2011, 11:25 AM

Ya I don't get the whole 3.5 vs 4 vs 5 inch DP thing. Don't see what kind of difference that could possibly make. Sounds great though bro

turugara · 10-07-2011, 11:49 AM

Quote:

Originally Posted by CJ421

Nothing but <3 for you Charles.

But there is a rediculous amount more turbo spool.

Slops · 10-07-2011, 12:18 PM

Wonder if it hits anything down there??? My Vishnu dp was a tight fit... I dun wanna know how tight this guy is!

turugara · 10-07-2011, 10:39 PM

Dyno's posted! More pics added also

turugara · 10-07-2011, 10:43 PM

JB4 Stage 2 Map 1 vs Map 2 doesn't show a significant difference. Is Map 2 really pushing out 14PSI?

10-06-2011, 09:26 PM	#1
turugara Major 91 Rep 1,324 Posts Drives: 335i Coupe, 6 Speed Join Date: May 2011 Location: NYC iTrader: (5) Garage List 2011 BMW 335i [9.44]	CP-E 5" Catless Downpipe for N55 Initial Thoughts ________________________________________________ I recently had the opportunity to offer my N55 335i to be Custom Performance Engineering's test platform for their 5" Catless downpipe. 5" I said? Madness. Impossible. SO I went down to headquarters in Beltsville, MD and called their bluff. Lo and behold... here it was This is me with the catless DP in front of my face. After a day of dyno runs with baselines, JB4 Stage 2 Map 1, Map 2, WOT pulls..... We have a bunch of pictures, video, and data. Dyno's ________________________________________________ A 70MPH fan was used. 3 pulls were done for consistency for each test. Dyno #1: Stock Baseline vs Stock + DP Dyno #2: JB4 Stage 2 Map 1 12.5 PSI VS Same tune + DP Dyno #3: JB4 Stage 2 Map 2 14 PSI vs Stock tune Baseline Pictures ________________________________________________ MORE TO COME SOON! Many thanks to Mike @ VAC for the hookup! Last edited by turugara; 10-08-2011 at 01:47 PM..
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10-06-2011, 09:27 PM	#2
nkadisha Lieutenant 44 Rep 526 Posts Drives: N54 335 Join Date: Feb 2011 Location: Los Angeles iTrader: (3)	Let's see the dynos! __________________
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10-06-2011, 09:31 PM	#3
CPWINCH Brigadier General 732 Rep 4,635 Posts Drives: Toyota Prius Join Date: May 2010 Location: Los Angeles iTrader: (7)	that sounds amazing! 5inch is to rediculous tho and i think unecassary. just adds weight what exhaust do u have __________________ Follow my BMW instagram @CARMODIFICATION Let me know you are from bimmerpost and i'll follow back
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10-06-2011, 09:39 PM	#5
CJ421 Brigadier General 1525 Rep 4,101 Posts Drives: BMW M3 Join Date: Feb 2011 Location: Blue Bell, PA iTrader: (1) Garage List 2024 BMW M3 Sedan [9.50]	Wow that is friggin' ridiculous!! I cannot wait to see this in person. __________________ 2024 BMW M3 Sedan Frozen Pure Grey II/Fjord Blue, 6MT Past: 2021 Z4 M40i Frozen Grey II/Black Alcantara \| 2017 F30 340i Mineral Gray/Coral Red, 6MT \| 2011 E92 335i Le Mans Blue/Black, 6MT
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10-06-2011, 10:10 PM	#8
mrj25 Colonel 196 Rep 2,163 Posts Drives: 2011 335i E90 LCI Join Date: Dec 2010 Location: OC-LA, CALI iTrader: (21)	that downpipe is on roids! sounds good though...i'm curious to see the dynos on it.
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10-07-2011, 12:00 AM	#9
ian2002525 台灣台北市 88 Rep 1,267 Posts Drives: 2009 GT-R Premium Join Date: Jun 2010 Location: Brentwood, TN/台灣 iTrader: (6) Garage List 2011 335i coupe [9.00]	doesn't hear turbo spool though... __________________ Car Sold- 2011 E92 335i Msport Car Sold- 2009 Nissan GT-R tuned on E85
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10-07-2011, 03:05 AM	#11
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)	subscribing __________________ ERnie 2016 BSM/f80/ZCP
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10-07-2011, 04:56 AM	#12
Slops Major General 188 Rep 5,417 Posts Drives: 2005 C55 AMG Join Date: Jan 2011 Location: Oxford iTrader: (2)	Thas a huge bitch lol!!!
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10-07-2011, 07:12 AM	#13
FrankiE90 Major General 654 Rep 8,801 Posts Drives: Krooked Sk8board Join Date: Feb 2008 Location: Pasadena, Ca iTrader: (11)	that DP looks like a little happy fat kid. give him some cake. 5" - did u ask them for a turbo upgrade always good to see new mods for the N55. __________________ FrankiE90 AKA:.[The TANK] *CLICK THE SIG E90s (been gone but not forgotten) • KW clubsports • • • • • • • • • • 18" BBS GT4 // Build E30 (pending) + E46 M3 Wagon ESTORIL Blue
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10-07-2011, 09:09 AM	#14
Pepe_pr Lieutenant 35 Rep 553 Posts Drives: 135i black on black Join Date: Sep 2010 Location: San Juan PR iTrader: (1)	its huge!!! lets see the Dyno sheets!! __________________ 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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10-07-2011, 11:08 AM	#17
ar design 295 Rep 4,408 Posts Drives: 04 M3 Join Date: Jan 2008 Location: Denver, CO iTrader: (9)	Looks like a really nice piece. 4" will support well over 1000whp with ease, not sure what the point of 5" is but... __________________ -Critter
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10-07-2011, 11:25 AM	#18
IancoleTX Dillo boxers 272 Rep 3,360 Posts Drives: 2019 M5C Join Date: Jan 2010 Location: USA iTrader: (14)	Ya I don't get the whole 3.5 vs 4 vs 5 inch DP thing. Don't see what kind of difference that could possibly make. Sounds great though bro
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10-07-2011, 12:18 PM	#20
Slops Major General 188 Rep 5,417 Posts Drives: 2005 C55 AMG Join Date: Jan 2011 Location: Oxford iTrader: (2)	Wonder if it hits anything down there??? My Vishnu dp was a tight fit... I dun wanna know how tight this guy is!
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10-07-2011, 10:39 PM	#21
turugara Major 91 Rep 1,324 Posts Drives: 335i Coupe, 6 Speed Join Date: May 2011 Location: NYC iTrader: (5) Garage List 2011 BMW 335i [9.44]	Dyno's posted! More pics added also
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10-07-2011, 10:43 PM	#22
turugara Major 91 Rep 1,324 Posts Drives: 335i Coupe, 6 Speed Join Date: May 2011 Location: NYC iTrader: (5) Garage List 2011 BMW 335i [9.44]	JB4 Stage 2 Map 1 vs Map 2 doesn't show a significant difference. Is Map 2 really pushing out 14PSI?
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