Ultimate Racing Exhaust being put on right now..

all8up · 04-20-2007, 08:39 PM

Quote:

Originally Posted by S4to335

Mine sounds very very nice...thumbs up to Ultimate Racing. Not too loud..not too mellow...definitely sounds modified...in a good way. I am very happy with my purchase...

BTW, I am not close to the bumper like those other pictures show...I have more room between the exhaust..and the bumper bottom.

Oh yeah...and I think it must added at least 1,000 bhp to the car..I can definitely take Veyrons now...

Even though those pictures look otherwise, my exhaust doesnt touch the bottom of the bumper, rather it touches a lower corner and at that part I put the rubber tubing in place.

6SpeedMan · 04-20-2007, 09:16 PM

Please give us a little insight on the sound of the exhaust, that would be damn greatly appreciated.

chris b. · 04-20-2007, 10:17 PM

all8up. what size tips are those?

S4to335 · 04-20-2007, 10:52 PM

I know what Magna3 and all8up are talking about at the lower rpm ranges..and I am totally fine with that sound. It is just the loudest part of the exhaust. It sounds really nice folks....I am very impressed with the low weight of the unit ...and the sound. To me..it sounds like some modified porsches I have heard on track. I am very happy with my purchase..and will not change a thing.

HyperM3 · 04-20-2007, 11:15 PM

Any pics from underneath when it was up on the lift?

evoi19 · 04-20-2007, 11:28 PM

Sigh...reading this just makes me upset that not many tuners have come out with a catback for the 328. Us lower folk just gotta wait a bit longer...

Anyways, nice to hear you guys are enjoying your new toy!!

uberschnell · 04-20-2007, 11:39 PM

It’s a drone (vibration) that occurs right around 2000 rpm. Now this drone only occurs under load and inside the cabin only. I guess it's to be expected with nothing but long pipes between the cats and the mufflers. Outside the overall volume hasn’t increased that much. Best way to describe it is a deep aggressive growl. No tin, no rasp.

As for the drone, the guy at the shop suggested putting in two 16” resonators along the straight portion of the test line. Any comments on whether this would help tone down the resonance?

BHairsto · 04-21-2007, 12:14 AM

Quote:

Originally Posted by Magna3

It’s a drone (vibration) that occurs right around 2000 rpm. Now this drone only occurs under load and inside the cabin only. I guess it's to be expected with nothing but long pipes between the cats and the mufflers. Outside the overall volume hasn’t increased that much. Best way to describe it is a deep aggressive growl. No tin, no rasp.

As for the drone, the guy at the shop suggested putting in two 16” resonators along the straight portion of the test line. Any comments on whether this would help tone down the resonance?

I also have the same resonance with my UR--I have driven All8up's car and his seems to have less vibration and noise than mine at that RPM range. I'm also hoping that the issue can be resolved with resonators of some sort. The noise doesn't bother me too badly most of the time, but it literally makes my wife ill on extended trips, so I definitely need to address it. I'm just hoping it doesn't cost an arm and a leg to have resonators installed. Please let me know your results if you try the resonator approach--it should work. Otherwise, this exhaust is outstanding--it's a 400rpm band away from being perfect!

j|rz44 · 04-21-2007, 06:09 AM

pics?

all8up · 04-21-2007, 07:07 AM

Quote:

Originally Posted by Magna3

It’s a drone (vibration) that occurs right around 2000 rpm. Now this drone only occurs under load and inside the cabin only. I guess it's to be expected with nothing but long pipes between the cats and the mufflers. Outside the overall volume hasn’t increased that much. Best way to describe it is a deep aggressive growl. No tin, no rasp.

As for the drone, the guy at the shop suggested putting in two 16” resonators along the straight portion of the test line. Any comments on whether this would help tone down the resonance?

My other solution would be to hack your stock exhaust and reuse the secondary cats that mate up to the downpipe flange. Not sure if that would be equally as effective as the resonator approach.

Chris b
I'm pretty sure they are 4" rolled tips btw.

uberschnell · 04-21-2007, 10:44 AM

all8up

So cats have an effect on dampening resonance? I spoke with the shop and they said they can open up the 2.25" inlets on the cats to match the 2.5" pipes. And it would be a cheap fix / 1 hour labor @$75.

Inkidoo · 04-23-2007, 12:43 AM

Quote:

Originally Posted by Walked U

How much did they charge you ? And was it from the primary cats back?

Im looking for an exhaust for an e90.

Hey Waked You, you could put two cutuouts since you like the underground stuff. Have the stock sound, and the none stock to surprice.

all8up · 04-23-2007, 07:52 AM

Quote:

Originally Posted by Magna3

all8up

So cats have an effect on dampening resonance? I spoke with the shop and they said they can open up the 2.25" inlets on the cats to match the 2.5" pipes. And it would be a cheap fix / 1 hour labor @$75.

That could work, but keep in mind you are sacraficing some performance for that since you are re-introducing a restriction.

SoCal335i · 04-23-2007, 01:11 PM

I would use resonators to remove drone, cats are too restrictive. I am using 2 Autospeed mufflers and two 16" resonators in my exhaust, and i am removing the secondary cats.

S4to335 · 04-23-2007, 01:21 PM

Mine doesnt have any bad resonance..I am not changing anything in that respect.

04-20-2007, 09:16 PM	#24
6SpeedMan Poor rich kid working 73 Rep 829 Posts Drives: 335i soon to be M3 Join Date: Oct 2005 Location: Bellevue, Washington iTrader: (0) Garage List 2006 E90 330i [0.00]	Please give us a little insight on the sound of the exhaust, that would be damn greatly appreciated. __________________
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04-20-2007, 10:17 PM	#25
chris b. Brigadier General 123 Rep 3,345 Posts Drives: zmp e90 Join Date: Oct 2006 Location: White Plains NY iTrader: (1) Garage List 2010 335i [0.00]	all8up. what size tips are those? __________________ Brentuning Cobb AP pro tune -IG: @beemeraddict 2010 335i zmp fbo, 465/513 E60 mix
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04-20-2007, 10:52 PM	#26
S4to335 Brigadier General 476 Rep 4,380 Posts Drives: 2014 Audi A4 / 91 Track Miata Join Date: Jan 2007 Location: San Jose, CA iTrader: (5) Garage List 2007 BMW 335i sedan [8.00]	I know what Magna3 and all8up are talking about at the lower rpm ranges..and I am totally fine with that sound. It is just the loudest part of the exhaust. It sounds really nice folks....I am very impressed with the low weight of the unit ...and the sound. To me..it sounds like some modified porsches I have heard on track. I am very happy with my purchase..and will not change a thing. __________________ Car is now gone .... :-(
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04-20-2007, 11:15 PM	#27
HyperM3 Too many Alex's, from now on, call me Beaufort 376 Rep 6,188 Posts Drives: See Sig Join Date: Feb 2007 Location: Lawrenceville, NJ iTrader: (8)	Any pics from underneath when it was up on the lift? __________________ 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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04-20-2007, 11:28 PM	#28
evoi19 Lieutenant General 1733 Rep 17,456 Posts Drives: 2022 G80C Join Date: Dec 2006 Location: Bay Area iTrader: (18)	Sigh...reading this just makes me upset that not many tuners have come out with a catback for the 328. Us lower folk just gotta wait a bit longer... Anyways, nice to hear you guys are enjoying your new toy!!
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04-20-2007, 11:39 PM	#29
uberschnell Brigadier General 687 Rep 4,080 Posts Drives: Wide Body 1 Join Date: Mar 2007 Location: Bay Area iTrader: (48)	It’s a drone (vibration) that occurs right around 2000 rpm. Now this drone only occurs under load and inside the cabin only. I guess it's to be expected with nothing but long pipes between the cats and the mufflers. Outside the overall volume hasn’t increased that much. Best way to describe it is a deep aggressive growl. No tin, no rasp. As for the drone, the guy at the shop suggested putting in two 16” resonators along the straight portion of the test line. Any comments on whether this would help tone down the resonance?
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04-21-2007, 06:09 AM	#31
j\|rz44 Lieutenant Colonel 45 Rep 1,683 Posts Drives: 335i\|E92 Join Date: Oct 2006 Location: Lost iTrader: (2) Garage List 07 335i [0.00]	pics? __________________ Life is Good
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04-21-2007, 10:44 AM	#33
uberschnell Brigadier General 687 Rep 4,080 Posts Drives: Wide Body 1 Join Date: Mar 2007 Location: Bay Area iTrader: (48)	all8up So cats have an effect on dampening resonance? I spoke with the shop and they said they can open up the 2.25" inlets on the cats to match the 2.5" pipes. And it would be a cheap fix / 1 hour labor @$75. Last edited by uberschnell; 04-21-2007 at 04:44 PM..
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04-23-2007, 01:11 PM	#36
SoCal335i Banned 17 Rep 768 Posts Drives: 2007 E92-TT Jet Blk Coral Red Join Date: Jan 2007 Location: Cali iTrader: (2)	I would use resonators to remove drone, cats are too restrictive. I am using 2 Autospeed mufflers and two 16" resonators in my exhaust, and i am removing the secondary cats.
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04-23-2007, 01:21 PM	#37
S4to335 Brigadier General 476 Rep 4,380 Posts Drives: 2014 Audi A4 / 91 Track Miata Join Date: Jan 2007 Location: San Jose, CA iTrader: (5) Garage List 2007 BMW 335i sedan [8.00]	Mine doesnt have any bad resonance..I am not changing anything in that respect. __________________ Car is now gone .... :-(
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