Midpipe question

mfeltiii · 04-18-2010, 05:48 PM

Any thoughts or info on what would be quieter/louder at IDLE OR LOW LOAD:
1. Midpipe with no cats and four resonators ie Dinan
2. Midpipe with 200cell cats and two resonators ie AA

This would apply to any cat-back, but specifically I'm running the AA cat-back.

Thanks in advance...

DevJ · 04-18-2010, 06:15 PM

I'm pretty sure most catless systems are louder than systems with hfcs. I don't know about Dinan since they tend to be more conservative. Hopeflly someone can help you answer your question.

H Bomb · 04-18-2010, 07:44 PM

here is mine. Dinan midpipe and Dinan muffler. hope this helps you.

mfeltiii · 04-19-2010, 10:28 AM

Thanks guys, anyone who has had an HFC set-up and subsequently gone catless want to chime in (haven't some of the FI peeps done this recently)? If so what were the resonator set ups on your systems pre and post change, and how did things change with regards to my original question?

H Bomb · 04-19-2010, 12:46 PM

i think other then the dinan midpipe the akra one will be no drone or low sound at low loud

zamm3k · 04-19-2010, 02:28 PM

If you're referring to the X Pipe alone, (without an axleback) then virtually anything will be drone-free due to the rear muffler. I run completely catless and I have no drone because I'm still runing my stock rear muffler.

mfeltiii · 04-19-2010, 03:50 PM

I'm speaking of loudness level in general at low load or idle, nothing to do with drone. Think "piss off the neighbors score" when driving at low speed out of the neighborhood. I'm running AA cat-back now and considering a full midpipe with the two configurations listed in the OP. So which one would have a lower/higher PONS (piss off neighbors score). Thanks

DevJ · 04-19-2010, 03:51 PM

get the xpipe with hfcs.

mixja · 04-19-2010, 05:06 PM

Quote:

Originally Posted by zamm3k

If you're referring to the X Pipe alone, (without an axleback) then virtually anything will be drone-free due to the rear muffler. I run completely catless and I have no drone because I'm still runing my stock rear muffler.

Not true - AA X-Pipe with HFCs + Stock Rear Muffler = lots of drone and resonance

mixja · 04-19-2010, 05:07 PM

Quote:

Originally Posted by mfeltiii

Any thoughts or info on what would be quieter/louder at IDLE OR LOW LOAD:
1. Midpipe with no cats and four resonators ie Dinan
2. Midpipe with 200cell cats and two resonators ie AA

This would apply to any cat-back, but specifically I'm running the AA cat-back.

Thanks in advance...

I would say the Dinan would be quieter but just a guess based upon my perception of the level of R&D between the two companies...

H Bomb · 04-19-2010, 10:36 PM

i have yet to piss anyone off. at low rpm's my car is quiet. that is what i love about my setup it is only loud when you want it to be

04-18-2010, 05:48 PM	#1
mfeltiii Second Lieutenant 8 Rep 262 Posts Drives: '10 AW E92 6mt Join Date: Jan 2010 Location: S. FLA iTrader: (1)	Midpipe question Any thoughts or info on what would be quieter/louder at IDLE OR LOW LOAD: 1. Midpipe with no cats and four resonators ie Dinan 2. Midpipe with 200cell cats and two resonators ie AA This would apply to any cat-back, but specifically I'm running the AA cat-back. Thanks in advance...
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04-18-2010, 06:15 PM	#2
DevJ Colonel 154 Rep 2,736 Posts Drives: R8 V10+/YMB M4 Join Date: Nov 2007 Location: Tulsa, OK iTrader: (1)	I'm pretty sure most catless systems are louder than systems with hfcs. I don't know about Dinan since they tend to be more conservative. Hopeflly someone can help you answer your question. __________________ ‘23 RRS First Edition '22 X7 M50i '18 R8 V10+ http://www.bimmerpost.com/forums/attachment.php?attachmentid=133578&d=1204654487[/IMG]
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04-18-2010, 07:44 PM	#3
H Bomb Lieutenant Colonel 65 Rep 1,676 Posts Drives: 08 M3 Join Date: Jul 2007 Location: FL to NY iTrader: (4)	here is mine. Dinan midpipe and Dinan muffler. hope this helps you. __________________ Street- 08 E92 M3- Sparkling Graphite/ Fox Red/6sp Track- 10 CRF 250-PR2 Race Motor/Ohlins TTX Susp Hauler- 06 Ford Skyjacker F250 4WD
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04-19-2010, 10:28 AM	#4
mfeltiii Second Lieutenant 8 Rep 262 Posts Drives: '10 AW E92 6mt Join Date: Jan 2010 Location: S. FLA iTrader: (1)	Thanks guys, anyone who has had an HFC set-up and subsequently gone catless want to chime in (haven't some of the FI peeps done this recently)? If so what were the resonator set ups on your systems pre and post change, and how did things change with regards to my original question?
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04-19-2010, 12:46 PM	#5
H Bomb Lieutenant Colonel 65 Rep 1,676 Posts Drives: 08 M3 Join Date: Jul 2007 Location: FL to NY iTrader: (4)	i think other then the dinan midpipe the akra one will be no drone or low sound at low loud __________________ Street- 08 E92 M3- Sparkling Graphite/ Fox Red/6sp Track- 10 CRF 250-PR2 Race Motor/Ohlins TTX Susp Hauler- 06 Ford Skyjacker F250 4WD
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04-19-2010, 02:28 PM	#6
zamm3k Bla! 82 Rep 909 Posts Drives: F82 M4 Join Date: Apr 2008 Location: Miami, FL iTrader: (4)	If you're referring to the X Pipe alone, (without an axleback) then virtually anything will be drone-free due to the rear muffler. I run completely catless and I have no drone because I'm still runing my stock rear muffler. __________________ ......................::.........................
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04-19-2010, 03:50 PM	#7
mfeltiii Second Lieutenant 8 Rep 262 Posts Drives: '10 AW E92 6mt Join Date: Jan 2010 Location: S. FLA iTrader: (1)	I'm speaking of loudness level in general at low load or idle, nothing to do with drone. Think "piss off the neighbors score" when driving at low speed out of the neighborhood. I'm running AA cat-back now and considering a full midpipe with the two configurations listed in the OP. So which one would have a lower/higher PONS (piss off neighbors score). Thanks
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04-19-2010, 03:51 PM	#8
DevJ Colonel 154 Rep 2,736 Posts Drives: R8 V10+/YMB M4 Join Date: Nov 2007 Location: Tulsa, OK iTrader: (1)	get the xpipe with hfcs. __________________ ‘23 RRS First Edition '22 X7 M50i '18 R8 V10+ http://www.bimmerpost.com/forums/attachment.php?attachmentid=133578&d=1204654487[/IMG]
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04-19-2010, 10:36 PM	#11
H Bomb Lieutenant Colonel 65 Rep 1,676 Posts Drives: 08 M3 Join Date: Jul 2007 Location: FL to NY iTrader: (4)	i have yet to piss anyone off. at low rpm's my car is quiet. that is what i love about my setup it is only loud when you want it to be __________________ Street- 08 E92 M3- Sparkling Graphite/ Fox Red/6sp Track- 10 CRF 250-PR2 Race Motor/Ohlins TTX Susp Hauler- 06 Ford Skyjacker F250 4WD
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