Resonator or High Flow cats?

badass335 · 10-06-2009, 08:53 PM

I just had my VK DP's installed along with CP-E exhaust and its.... LOUD...
A little too loud for my taste... What are my choices? Catted DP? Resonators?

The issues... wayyyy too much drone.. and just too plain loud.

On the plus side... car is damn fast!!

ToadHollow · 10-06-2009, 09:07 PM

Catted downpipes would be my choice. Still have the performance.

Gen_E92 · 10-06-2009, 09:12 PM

resonators for sure! doesn't kill your performance while eliminating most of the drone.

ToadHollow · 10-06-2009, 09:14 PM

Quote:

Originally Posted by Gen_E92

resonators for sure! doesn't kill your performance while eliminating most of the drone.

Yeah, what you said makes more sense ......... I must be falling asleep here.

Sal G@Camber-Toe · 10-06-2009, 09:16 PM

j/w, mind posting a clip of this exhaust?

Mr. 5 · 10-06-2009, 10:41 PM

Quote:

Originally Posted by Gen_E92

resonators for sure! doesn't kill your performance while eliminating most of the drone.

I disagree. IMO, resonators only take away high frequencies which do nothing for drone.
If you really want to get rid of drone then put in some HFCs.

badass335 · 10-07-2009, 12:16 AM

Quote:

Originally Posted by Mr. 5

I disagree. IMO, resonators only take away high frequencies which do nothing for drone.
If you really want to get rid of drone then put in some HFCs.

DAMN YOU!!!!

what is the wife gonna say now when yet another box shows up!!!

thats actually the direction i was thinking.. a painfull direction...

enrita · 10-07-2009, 01:17 AM

i am going the resonator way for the midpipes now, will see how the sound will be.

marconi118 · 10-07-2009, 04:12 AM

Quote:

Originally Posted by Mr. 5

I disagree. IMO, resonators only take away high frequencies which do nothing for drone.
If you really want to get rid of drone then put in some HFCs.

Yes after some testing on previous cars: the resonators (straight mufflers with perforated pipe and rock wool) are high pas filters, they remove high frequencies but not low frequencies (= drone)

It seems HFcats remove both high and low frequencies.

Dose someone knows what could attenuate low frequencies (drone) without attenuating high freq.?
Actually my goal is to obtain high pitch metallic exhaust like F360 or M3 CSL

Cptn Mo 703 · 10-07-2009, 10:38 AM

hows the VK DP's? do you like them? any trouble installing them? can you feel the difference?

munters · 10-07-2009, 10:47 AM

Quote:

Originally Posted by marconi118

Yes after some testing on previous cars: the resonators (straight mufflers with perforated pipe and rock wool) are high pas filters, they remove high frequencies but not low frequencies (= drone)

It seems HFcats remove both high and low frequencies.

Dose someone knows what could attenuate low frequencies (drone) without attenuating high freq.?
Actually my goal is to obtain high pitch metallic exhaust like F360 or M3 CSL

You could install a speaker and a tone generator. would be for shure unique on the market and tunable to your wish.

marconi118 · 10-07-2009, 11:09 AM

yes for sure! the same as putting a gas bottle with nozzle in exhaust to have flames!!!

But there is a way to tune the exhaust at an higher pitch, with kind if helmoltz resonator etc, but very difficult and no example to get inspired from.

It seems Dinan uses it for E92 M2, there are pictures on his site

badass1g · 10-07-2009, 12:35 PM

i would do high flow cats if its to loud, resonaters hardly make a difference in sound.

badass335 · 10-07-2009, 02:17 PM

Quote:

Originally Posted by Cptn Mo 703

hows the VK DP's? do you like them? any trouble installing them? can you feel the difference?

I had a local shop do it. The pipes are fine! No issues with install for my guys. They do a lot of high performance installs so i got the usual, ' i hate working on these cars with no room' comments but overall, no issues. I can definietly feel the difference though. You get to hear more sounds as well!

badass335 · 10-07-2009, 02:19 PM

Quote:

Originally Posted by badass1g

i would do high flow cats if its to loud, resonaters hardly make a difference in sound.

I was actually talking to another member on here and he's getting his install done today actually. See what his feedback is. He has the exact setup i was going to look at as well. CP-E exhaust with CP-E HFC dp's.

FLA 335 · 11-28-2009, 03:05 PM

Quote:

Originally Posted by badass335

I just had my VK DP's installed along with CP-E exhaust and its.... LOUD...
A little too loud for my taste... What are my choices? Catted DP? Resonators?

The issues... wayyyy too much drone.. and just too plain loud.

On the plus side... car is damn fast!!

Hi, sorry if i am bring this thread back, but were you able to resolve your problem of drone?

Also if so, which road did you go? cats or resonator?

thanks!

badass335 · 11-28-2009, 03:20 PM

I went with thr CP-E catted dp's, CP-E resonated mid pipes, and Bastuck axle backs and NO DRONE

Quote:

Originally Posted by FLA 335

Hi, sorry if i am bring this thread back, but were you able to resolve your problem of drone?

Also if so, which road did you go? cats or resonator?

thanks!

cn555ic · 11-28-2009, 03:28 PM

Quote:

Originally Posted by badass335

I went with thr CP-E catted dp's, CP-E resonated mid pipes, and Bastuck axle backs and NO DRONE

I have the CPE exhaust also and ordered the AR catless DPs...With just the CPE exhaust the car was pretty loud to begin with, with the addition of the DPs how much louder are we speaking of?? I mean the exhaust does drone a little when its under load (going up hill etc) with my OEM dps...Is it amplified much more with the catless DPs...Did it sound ricey loud?? Or nice loud.. I can live with a little noise since its not my daily driver, but if its obnoxious loud, then I might have to get the catted AR DPs if i still can change my order

MrBEEF · 11-28-2009, 03:59 PM

I am having the reverse of the same problem....

I got Dinan Exhaust...GREAT sound but too quiet!

I was thinking of removing resonators.

Will this make it sounds like S#!T? or just make it a bit louder?

badass335 · 11-28-2009, 04:14 PM

Quote:

Originally Posted by cn555ic

I have the CPE exhaust also and ordered the AR catless DPs...With just the CPE exhaust the car was pretty loud to begin with, with the addition of the DPs how much louder are we speaking of?? I mean the exhaust does drone a little when its under load (going up hill etc) with my OEM dps...Is it amplified much more with the catless DPs...Did it sound ricey loud?? Or nice loud.. I can live with a little noise since its not my daily driver, but if its obnoxious loud, then I might have to get the catted AR DPs if i still can change my order

For me it was too loud. It's an awesome rumble outside. I had people comment they liked the sound better than the v8 m3! Inside with an auto and under load, my head was spiltting open! I thought it was the vk dps but even after getting catted dps and resonators still a tad too loud for me. Not ricey high pitched fart can loud but nice low ' watch out I'm hiding speed' rumble. In the end the dps had very little difference in sound for me. It was more the rear cans that made the difference.

In your case if you find it a little loud now, yes it will amplify, but not huge. If you are ok now, you'll be fine with the catless dps

badass335 · 11-28-2009, 04:18 PM

Quote:

Originally Posted by MrBEEF

I am having the reverse of the same problem....

I got Dinan Exhaust...GREAT sound but too quiet!

I was thinking of removing resonators.

Will this make it sounds like S#!T? or just make it a bit louder?

How long have you had them on? My bastuck when installed sounded as quiet as stock. Took her for a few very spirited runs and a week later, it got louder. Beautiful rumble now. I compared to a few BMW performance guys and they are a tad louder than me! Give it time!

enrita · 11-28-2009, 04:44 PM

Quote:

Originally Posted by enrita

i am going the resonator way for the midpipes now, will see how the sound will be.

After installing the resonators my drone is completely gone.

10-06-2009, 08:53 PM	#1
badass335 Lieutenant Colonel 116 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	Resonator or High Flow cats? I just had my VK DP's installed along with CP-E exhaust and its.... LOUD... A little too loud for my taste... What are my choices? Catted DP? Resonators? The issues... wayyyy too much drone.. and just too plain loud. On the plus side... car is damn fast!!
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10-06-2009, 09:07 PM	#2
ToadHollow Once upon a time ...... 279 Rep 5,048 Posts Drives: 2008 JB E92 - SOLD 5/2010 Join Date: Sep 2008 Location: Asti, Italy & Austin, Texas iTrader: (16) Garage List 2008 E92 335i [8.00]	Catted downpipes would be my choice. Still have the performance. __________________
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10-06-2009, 09:12 PM	#3
Gen_E92 Brigadier General 120 Rep 3,430 Posts Drives: slow Join Date: Oct 2006 Location: Vancouver iTrader: (17) Garage List 2007 335i [7.80]	resonators for sure! doesn't kill your performance while eliminating most of the drone.
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10-06-2009, 09:16 PM	#5
Sal G@Camber-Toe 204 Rep 14,190 Posts Drives: E92 335xi 6mt Join Date: Jun 2009 Location: Long Island, NY iTrader: (2)	j/w, mind posting a clip of this exhaust?
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10-07-2009, 01:17 AM	#8
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	i am going the resonator way for the midpipes now, will see how the sound will be. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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10-07-2009, 10:38 AM	#10
Cptn Mo 703 Lieutenant Colonel 119 Rep 1,603 Posts Drives: my feet Join Date: May 2009 Location: NoVa iTrader: (15) Garage List 2010 BMW e92 M3 ret ... [10.00] 2009 BMW e93 335i r ... [9.50]	hows the VK DP's? do you like them? any trouble installing them? can you feel the difference? __________________ 2008 Alpine White e93 335i- Sold 2009 Black Sap. Met. e93 335i- Sold 2010 Melbourne Red e92 M3- Sold
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10-07-2009, 11:09 AM	#12
marconi118 Major 96 Rep 1,186 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	yes for sure! the same as putting a gas bottle with nozzle in exhaust to have flames!!! But there is a way to tune the exhaust at an higher pitch, with kind if helmoltz resonator etc, but very difficult and no example to get inspired from. It seems Dinan uses it for E92 M2, there are pictures on his site
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10-07-2009, 12:35 PM	#13
badass1g Captain 53 Rep 646 Posts Drives: 07 335i Join Date: Oct 2009 Location: utah iTrader: (7)	i would do high flow cats if its to loud, resonaters hardly make a difference in sound.
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11-28-2009, 03:59 PM	#19
MrBEEF Private 8 Rep 72 Posts Drives: E90 Dinan Join Date: May 2009 Location: Pasadena, CA iTrader: (1)	I am having the reverse of the same problem.... I got Dinan Exhaust...GREAT sound but too quiet! I was thinking of removing resonators. Will this make it sounds like S#!T? or just make it a bit louder?
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