Vishnu Exhaust ' vs ' Borla

NPDAN · 09-06-2007, 01:40 PM

Im thinking about switching out my Borla cat back for the Vishnu cat back. Does anyone on here have the Vishnu exhaust. Are you happy with it? How bad if any is the "Drone"...

Thanks in advance for your advice!!!

down4it · 09-06-2007, 01:54 PM

Quote:

Originally Posted by NPDAN

Im thinking about switching out my Borla cat back for the Vishnu cat back. Does anyone on here have the Vishnu exhaust. Are you happy with it? How bad if any is the "Drone"...

Thanks in advance for your advice!!!

I heard it at Harman Motive on Dans 335i... Its a not too loud and doesnt drone but its throaty and deep... You can get it directly from Harman in torrance...

NPDAN · 09-06-2007, 02:02 PM

Quote:

Originally Posted by down4it

I heard it at Harman Motive on Dans 335i... Its a not too loud and doesnt drone but its throaty and deep... You can get it directly from Harman in torrance...

Did you like it... im lookin for something like that, just hard to gauge it since I haven't heard it myself you know.

SByota · 09-06-2007, 02:22 PM

I have it, bought it directly from Dan in Torrance. I really like it, good sound without being to loud. Does it drone, yes a little, not bad at all though. Where in socal are you? I am in the Santa Barbara area and would be willing to give you a ride if you arre ever in the area. PM me for details.

NPDAN · 09-06-2007, 06:11 PM

Quote:

Originally Posted by down4it

I heard it at Harman Motive on Dans 335i... Its a not too loud and doesnt drone but its throaty and deep... You can get it directly from Harman in torrance...

I went down there this afternoon and dropped my car off. Picking it up in a couple of hours. I'll let you know how it comes out.

down4it · 09-06-2007, 06:13 PM

Quote:

Originally Posted by NPDAN

I went down there this afternoon and dropped my car off. Picking it up in a couple of hours. I'll let you know how it comes out.

Awesome... Tell Ian if you see him that Oren with the black 335 says what up!

NPDAN · 09-06-2007, 06:23 PM

Quote:

Originally Posted by down4it

Awesome... Tell Ian if you see him that Oren with the black 335 says what up!

Yep, will do when I pick it up

Chio · 09-06-2007, 09:45 PM

wow you dumped the borla already?

mayno · 09-06-2007, 11:27 PM

when you guys refer to a droning exhaust note, what exactly does droning sound like? is there a soundclip I can listen to? thanks.

NPDAN · 09-07-2007, 12:10 AM

Quote:

Originally Posted by Chio

wow you dumped the borla already?

Yea and now im pissed ....(Im an idiot) I didnt think it would sound the way it does.I did hear quick blips and it sounded great but under load it's not to my liking... it's too Ricey and you dont know it until it's too late... im wasting sooo much money cause I wont even give this one a chance. im going back to the Borla...FUCK

kaji335i · 09-07-2007, 12:56 AM

I have the Vishnu/Harman Motive exhaust and love it. Its definately on the conservative side, especially at idle and light throttle. At wot it has a nice deep note.

NPDAN · 09-07-2007, 01:03 AM

Quote:

Originally Posted by SilverState

Wait, are you saying that you HAD a Borla, traded it for a Vishnu/Magnaflow, and now it is too ricey sounding. Sooo, now you are going back to the Borla becasue the Borla is not ricey sounding?

Yea, pretty much and also at the same time wanting to give it a chance.... Im getting myself pretty f'n confused... I think I should give it a chance, im just fucked up..............I will suck it up and run it for a month or two and see if I can change my mind

XPO186 · 09-07-2007, 01:26 AM

ricey? maybe it's just not your taste... I'm considering the Vishnu because everyone says it's very conservative

tek818 · 09-07-2007, 02:23 AM

wow... interesting chain of events. Maybe try a secondary cat delete with the borla? I think I'm going to be getting the borla + 2nd cat del then later a catted downpipe (when there is a procede map)

down4it · 09-07-2007, 03:30 AM

Quote:

Originally Posted by NPDAN

Yea, pretty much and also at the same time wanting to give it a chance.... Im getting myself pretty f'n confused... I think I should give it a chance, im just fucked up..............I will suck it up and run it for a month or two and see if I can change my mind

At least let it break in...

NPDAN · 09-07-2007, 08:21 AM

Quote:

Originally Posted by down4it

At least let it break in...

I will, but i think I may get different tips put on.. They put on the 4" and they look big to me...

335Transformer · 09-07-2007, 08:25 AM

You are just amplifying a 6 cylinder whatever you do. It sounds ricey to me all the time cuz I am used to my S4 V8 burble.

They all sound ricey to me but I heard a clip of an RD Sport that didn't sound too bad.

HyperM3 · 09-07-2007, 08:36 AM

What didnt you like about the Borla in the first place?

NPDAN · 09-07-2007, 08:50 AM

Quote:

Originally Posted by HyperM3

What didnt you like about the Borla in the first place?

Borla became my 1st true love from past ownership. The problem is is that I've always had it on trucks with big v8's. It's the perfect exhaust for a truck.. My intention with the Vishnu was to find the in between louder than present but not crazy loud. From reading and talking with people, I was convinced that this exhaust would be the one. Maybe it is and I need to get used to it. We'll see... Let me ask you this, would getting smaller tip reduce any of the sound? This exhaust has 4" tips on it. Just curious...

HyperM3 · 09-07-2007, 09:07 AM

Quote:

Originally Posted by NPDAN

Let me ask you this, would getting smaller tip reduce any of the sound? This exhaust has 4" tips on it. Just curious...

Thats an excellent question related to physics of sound. The depth of the tips have a lot to play into the sound as does the total diameter. I could be wrong here(and someone please correct me) but from what I understand, the length of the tip has to be at least 1.5x the diameter to create any difference in sound characteristics. So lets say your 4" diameter tips had a 6" depth to them. Now you had the same tip in the same length but the diameter was 3", the sound would now have more time to bounce against the inside and get quieter. The more bouncing, the more the sound gets muted(and increases back pressure). Thats why 2 pipes converted to one pipe is typically louder. The soundwaves have more room to travel farther inside the pipe before bouncing.

That being said, of all the tips that were available on my tri-flo for my M3, the DTM(upturned) tips seemed the loudest. Louder than the dual, single oval or angle cut.

Again, I could be wrong here.

NPDAN · 09-07-2007, 09:19 AM

Quote:

Originally Posted by HyperM3

Thats an excellent question related to physics of sound. The depth of the tips have a lot to play into the sound as does the total diameter. I could be wrong here(and someone please correct me) but from what I understand, the length of the tip has to be at least 1.5x the diameter to create any difference in sound characteristics. So lets say your 4" diameter tips had a 6" depth to them. Now you had the same tip in the same length but the diameter was 3", the sound would now have more time to bounce against the inside and get quieter. The more bouncing, the more the sound gets muted(and increases back pressure). Thats why 2 pipes converted to one pipe is typically louder. The soundwaves have more room to travel farther inside the pipe before bouncing.

That being said, of all the tips that were available on my tri-flo for my M3, the DTM(upturned) tips seemed the loudest. Louder than the dual, single oval or angle cut.

Again, I could be wrong here.

Hmmmm, so do you think if I went with smaller tips it would quiet it down a little?

HyperM3 · 09-07-2007, 09:22 AM

Quote:

Originally Posted by NPDAN

Hmmmm, so do you think if I went with smaller tips it would quiet it down a little?

I would think if you went from 4" to 3" tips that would definitely make a difference as long as the length of the tip remains the same.

09-06-2007, 01:40 PM	#1
NPDAN Colonel 95 Rep 2,573 Posts Drives: AW DCT M3 Join Date: Feb 2007 Location: So.Cal iTrader: (7) Garage List 2008 E92 M3 [8.00] 07' E92 335i [0.00]	Vishnu Exhaust ' vs ' Borla Im thinking about switching out my Borla cat back for the Vishnu cat back. Does anyone on here have the Vishnu exhaust. Are you happy with it? How bad if any is the "Drone"... Thanks in advance for your advice!!! __________________
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09-06-2007, 02:22 PM	#4
SByota Enlisted Member 1 Rep 35 Posts Drives: 2007 335i Join Date: Jul 2007 Location: Santa Barbara, CA iTrader: (1)	I have it, bought it directly from Dan in Torrance. I really like it, good sound without being to loud. Does it drone, yes a little, not bad at all though. Where in socal are you? I am in the Santa Barbara area and would be willing to give you a ride if you arre ever in the area. PM me for details.
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09-06-2007, 09:45 PM	#8
Chio Lieutenant 118 Rep 566 Posts Drives: G80 M3 Cp, x7 M60 Join Date: Oct 2006 Location: STL iTrader: (1)	wow you dumped the borla already?
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09-06-2007, 11:27 PM	#9
mayno Captain 72 Rep 613 Posts Drives: 2007 335i / 2018 BMW 430i Conv Join Date: Dec 2006 Location: So Cal iTrader: (0)	when you guys refer to a droning exhaust note, what exactly does droning sound like? is there a soundclip I can listen to? thanks.
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09-07-2007, 12:56 AM	#11
kaji335i Lieutenant Colonel 36 Rep 1,896 Posts Drives: e92 335i Join Date: Nov 2006 Location: that place iTrader: (0)	I have the Vishnu/Harman Motive exhaust and love it. Its definately on the conservative side, especially at idle and light throttle. At wot it has a nice deep note.
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09-07-2007, 01:26 AM	#13
XPO186 Colonel 128 Rep 2,740 Posts Drives: E92 335i Join Date: May 2007 Location: Albany, NY iTrader: (19)	ricey? maybe it's just not your taste... I'm considering the Vishnu because everyone says it's very conservative __________________
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09-07-2007, 02:23 AM	#14
tek818 Lieutenant Colonel 137 Rep 1,954 Posts Drives: 2020 X3M Competition Join Date: Mar 2007 Location: Los Angeles, CA iTrader: (2) Garage List 2018 M3 ZCP [9.50]	wow... interesting chain of events. Maybe try a secondary cat delete with the borla? I think I'm going to be getting the borla + 2nd cat del then later a catted downpipe (when there is a procede map)
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09-07-2007, 08:25 AM	#17
335Transformer Captain 45 Rep 795 Posts Drives: Forecast: Sunny Join Date: May 2007 Location: Florida iTrader: (0)	You are just amplifying a 6 cylinder whatever you do. It sounds ricey to me all the time cuz I am used to my S4 V8 burble. They all sound ricey to me but I heard a clip of an RD Sport that didn't sound too bad. __________________
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09-07-2007, 08:36 AM	#18
HyperM3 Too many Alex's, from now on, call me Beaufort 343 Rep 6,188 Posts Drives: See Sig Join Date: Feb 2007 Location: Lawrenceville, NJ iTrader: (8)	What didnt you like about the Borla in the first place? __________________ 13 HD FatBob 17 A4 Glacier/Black 1st Edition/Pre+/Sport/EurocodeTMD/Racechip 16 S6 (gone),14 S6 (gone),14 S6 (gone),13 S6 (gone),10 S4 (gone) 07 335i(gone)
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