VIDEO : Open catless DP's

335why · 03-30-2012, 02:00 PM

Opened up the downpipes just for the hell of it...sounds like a MONSTER!

Instant spool !

E90SoFlo · 03-30-2012, 02:03 PM

So you installed cutouts?

Do you have pics of the cutouts?

KyLu II · 03-30-2012, 02:29 PM

That's it?

Beemw335 · 03-30-2012, 04:19 PM

What do you mean be opened up the downpipes?
Ran catless dps with no exhaust?

dlbrooks18 · 03-30-2012, 04:39 PM

Quote:

Originally Posted by Beemw335

What do you mean be opened up the downpipes?
Ran catless dps with no exhaust?

+1, yes please explain, sounds like a beast!

Zebra99 · 03-30-2012, 05:54 PM

Sounds like a beast, but does it run like a beast.
I would assume you need to tune to have the car run properly with all that back pressure. Map 5 on JB4?

I'd be interested to see dyno #'s with that set-up.

ichi_ban · 03-30-2012, 06:45 PM

Looks like no exhaust to me. Definitely sounds sick.

335why · 03-30-2012, 07:04 PM

I disconnected the catless DP's to where the exhaust bolts up to them.

Torque monster with them opened....

Just hooked the full exhaust back up its so quiet LOL !!!

I cant believe nobody on here has done this!?!?!

People run open downpipes all the time on turbo cars.....

dlbrooks18 · 03-30-2012, 07:10 PM

Quote:

Originally Posted by 335why

I disconnected the catless DP's to where the exhaust bolts up to them.

Torque monster with them opened....

Just hooked the full exhaust back up its so quiet LOL !!!

I cant believe nobody on here has done this!?!?!

People run open downpipes all the time on turbo cars.....

Cool, that's what everybody was thinking, people have done this.. I've only seen/heard this setup at the track tho, glorious sound indeed

Z3->WRX->335 · 03-30-2012, 08:32 PM

I did this on my subaru one time..it was unbelievably loud

Bakeme521 · 03-30-2012, 11:34 PM

I've done the same and it sounds like ass inside the car and there were absolutely no power gains from it. I think the louder sound just made you feel like you were going faster.

akotten · 03-30-2012, 11:35 PM

Quote:

Originally Posted by Bakeme521

I've done the same and it sounds like ass inside the car and there were absolutely no power gains from it. I think the louder sound just made you feel like you were going faster.

QFT

boostaholic786 · 03-30-2012, 11:50 PM

Yea that def sounds pretty damn good to be honest. I wonder what kind of effect it has on the turbos/motor... I know for a fact that the less backpressure the more air that can be inducted into the intake therefore making it easier for the turbos to spool and less stress on them as well because more air and no back pressure... Thats just logical to me if I really think about it.. But yes, I bet its WAY to loud in the cabin lol.

hotrod182 · 03-31-2012, 12:37 AM

I actually did some 0-130 runs in that configuration.
I was driving around on straight downpipes for a few days.
It was so loud it distorted the camera mic, and rattle coins in the car.
The car seemed to lose low end torque.

ianthegreat · 03-31-2012, 11:44 AM

Agreed, you need the back pressure in some instances. I felt a loss in low end torque as well.

Jeff@TopGearSolutions · 03-31-2012, 11:45 AM

I know a handful of guys that used to run like this on the street, with drag radials too LOL

BoostAddict · 03-31-2012, 12:35 PM

I used to run my car like that all the. It sounded very different than yours though. I wish I would have gotten a sound clip from the outside. I only have in-cabin clips.

Windows down

Windows up

03-30-2012, 02:00 PM	#1
335why Private First Class 16 Rep 185 Posts Drives: 335i Join Date: Mar 2011 Location: In the garage confused as hell..... iTrader: (1)	VIDEO : Open catless DP's Opened up the downpipes just for the hell of it...sounds like a MONSTER! Instant spool !
	Appreciate 0 Tweet Quote

03-30-2012, 02:03 PM	#2
E90SoFlo Banned 196 Rep 2,669 Posts Drives: E90 335i Join Date: Jun 2011 Location: Naples, FL iTrader: (9)	So you installed cutouts? Do you have pics of the cutouts?
	Appreciate 0 Quote

03-30-2012, 02:29 PM	#3
KyLu II FREE DREAMK 162 Rep 9,321 Posts Drives: the shiiit! Join Date: Aug 2009 Location: Vineland, NJ iTrader: (6) Garage List 2011 Lexus LFA [3.76]	That's it? __________________
	Appreciate 0 Quote

03-30-2012, 04:19 PM	#4
Beemw335 Colonel 62 Rep 2,013 Posts Drives: 335i Join Date: Mar 2011 Location: My car is my home iTrader: (2)	What do you mean be opened up the downpipes? Ran catless dps with no exhaust?
	Appreciate 0 Quote

03-30-2012, 05:54 PM	#6
Zebra99 Colonel 112 Rep 2,856 Posts Drives: 2011 335is E93 Join Date: Aug 2011 Location: Ontario iTrader: (6) Garage List 2008 BMW 335i E93 [10.00]	Sounds like a beast, but does it run like a beast. I would assume you need to tune to have the car run properly with all that back pressure. Map 5 on JB4? I'd be interested to see dyno #'s with that set-up.
	Appreciate 0 Quote

03-30-2012, 06:45 PM	#7
ichi_ban Major 36 Rep 1,019 Posts Drives: X6 50i Join Date: Nov 2011 Location: FL iTrader: (24)	Looks like no exhaust to me. Definitely sounds sick. __________________ @ichi_ban
	Appreciate 0 Quote

03-30-2012, 07:04 PM	#8
335why Private First Class 16 Rep 185 Posts Drives: 335i Join Date: Mar 2011 Location: In the garage confused as hell..... iTrader: (1)	I disconnected the catless DP's to where the exhaust bolts up to them. Torque monster with them opened.... Just hooked the full exhaust back up its so quiet LOL !!! I cant believe nobody on here has done this!?!?! People run open downpipes all the time on turbo cars.....
	Appreciate 0 Quote

03-30-2012, 08:32 PM	#10
Z3->WRX->335 Major 44 Rep 1,016 Posts Drives: e92 335i Join Date: Sep 2011 Location: PA iTrader: (1)	I did this on my subaru one time..it was unbelievably loud __________________ Crimson Red e92 335i - H&R Premium Performance Coilovers, 19" AG m359's, Cobb AP, BMS DCI, AA CP/BOV, OEM Gloss Black Grills, M3 sideskirts
	Appreciate 0 Quote

03-30-2012, 11:34 PM	#11
Bakeme521 Some say... 239 Rep 4,296 Posts Drives: Fresh Join Date: Mar 2010 Location: Baton Rouge n NOLA iTrader: (12) Garage List 2007 BMW 335i [8.24]	I've done the same and it sounds like ass inside the car and there were absolutely no power gains from it. I think the louder sound just made you feel like you were going faster. __________________ I have exhaust and an intake...
	Appreciate 0 Quote

03-30-2012, 11:50 PM	#13
boostaholic786 Captain 40 Rep 623 Posts Drives: E92 N54 with MHD Custom flash Join Date: Dec 2011 Location: Plano TX iTrader: (0)	Yea that def sounds pretty damn good to be honest. I wonder what kind of effect it has on the turbos/motor... I know for a fact that the less backpressure the more air that can be inducted into the intake therefore making it easier for the turbos to spool and less stress on them as well because more air and no back pressure... Thats just logical to me if I really think about it.. But yes, I bet its WAY to loud in the cabin lol.
	Appreciate 0 Quote

03-31-2012, 12:37 AM	#14
hotrod182 . 812 Rep 3,974 Posts Drives: 2023 i4 M50 Join Date: Dec 2006 Location: California iTrader: (0)	I actually did some 0-130 runs in that configuration. I was driving around on straight downpipes for a few days. It was so loud it distorted the camera mic, and rattle coins in the car. The car seemed to lose low end torque. __________________ 2011 Alpine 335d M-Sport 12.34 @ 110.48mph 2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy)
	Appreciate 0 Quote

03-31-2012, 11:44 AM	#15
ianthegreat Colonel 60 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	Agreed, you need the back pressure in some instances. I felt a loss in low end torque as well.
	Appreciate 0 Quote

03-31-2012, 11:45 AM	#16
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	I know a handful of guys that used to run like this on the street, with drag radials too LOL
	Appreciate 0 Quote

03-31-2012, 12:35 PM	#17
BoostAddict Banned 48 Rep 932 Posts Drives: SGM 335i Join Date: Jan 2010 Location: Boynton Beach, FL iTrader: (4)	I used to run my car like that all the. It sounded very different than yours though. I wish I would have gotten a sound clip from the outside. I only have in-cabin clips. Windows down Windows up
	Appreciate 0 Quote