Quietest Boosted Exhaust?

Jayhovah · 04-23-2017, 11:11 AM

Quote:

Originally Posted by MoulaZ

Dirt cheap too. Dayum...

CNT RACING 09-13 Nissan 370z Bolt on catback Exhaust system (non Nismo model) , 370 exhaust, 370z catback exhaust, 370 performance exhaust

I'd have one on my '13 too if it didn't already have an Invidia Gemini on it when I bought it.

Hotrodz · 04-23-2017, 11:18 AM

I have the FI 3" exhaust and it is quite a bit quieter than motordyne or the FI 2.5". I it has a nice tone to it and when you get on the throttle it will open up nicely. You may also pick up a few whp with a 3" exhaust!

Sent from my SM-N910P using Tapatalk

Nismonerd · 04-23-2017, 12:18 PM

You could simply quiet down the exhaust you have. Take a look at using side branch resonators, it really works and doesn't lower performance.
Fancy Tech: How to Get Rid of Exhaust Drone, works great!

Cell · 04-23-2017, 12:34 PM

Do you have turbo or supercharger? If you have turbo, is it open dump wastegates? If so that is your issue as to why it's so loud.

Sent from my SM-G935T using Tapatalk

Hotrodz · 04-23-2017, 12:36 PM

Quote:

Originally Posted by Cell

Do you have turbo or supercharger? If you have turbo, is it open dump wastegates? If so that is your issue as to why it's so loud.

Sent from my SM-G935T using Tapatalk

He is supercharged!

Sent from my SM-N910P using Tapatalk

ChaseZ · 04-24-2017, 01:08 AM

Yes supercharged with an Si trim Vortech, so I'm moving some extra air. Also I'm waiting for TG's A/A kit to show up and air going in can affect the exhaust note a lot so I won't make any decisions until after that's on and see how it is.

But in any case the FI resonated test pipes and Motordyne combo is going to be WAY too loud for me. There is zero drone, rasp or anything like that, it's just the volume that is the issue.

I could also look st replacing the central Motordyne muffler 2@2.5in and 2@3.0out with something else, but then I really wouldn't know what kind of sound I'd end up with beforehand and then I'd be sort of stuck with it.

Love the motordyne exhaust and would hate to see it go but if that ends up being the answer then so be it. Quiet is more important to me right now.

Perhaps there is an armytrix type solution I can cut in as well for a bit more restriction for normal driving and can open the valve for the track. I'll have to look into that a bit further. Kind of the opposite of cutouts I guess lol

future370zzz · 04-24-2017, 04:06 PM

I have FI resonated test pipes and FI 18" resonated catback and the drone was getting to me so I added in side branch resonators which made it more bearable and made the exhaust quieter outside.

An option would be to restrict the airflow with small diameter pipes and resonated mufflers but that would probably raise temps and pressure.

I was actually thinking about switching over to Motordyne to eliminate the drone inside the cabin.

If you want to switch exhaust setups let me know.hahaha

TopgunZ · 04-24-2017, 05:05 PM

I had the Motordyne resonated test pipes with the side branch resonators and the FI exhaust with 18" resonators and it still rattled my head.

The only way to do it is to add in additional mass in mufflers or downstream cats.

future370zzz · 04-24-2017, 06:14 PM

My old Comptech exhaust for my RSX had muffler tip inserts to quiet it down.

MoulaZ · 04-24-2017, 11:05 PM

Looks like I'm going with Invidia. Can't seem to get a Injen into Australia for less than $2K AUD. Can get a local Invidia Q300 for $1.5K.

Absolutely gutted, but the Motordyne has to go.

ChaseZ · 04-25-2017, 01:15 AM

Quote:

Originally Posted by MoulaZ

Looks like I'm going with Invidia. Can't seem to get a Injen into Australia for less than $2K AUD. Can get a local Invidia Q300 for $1.5K.

Absolutely gutted, but the Motordyne has to go.

That's a hard realization to come to. The Motordyne is so sweet. Think I'll try some downstream HFC before I make that call.

Those prices are crazy but I guess everything has to be shipped a long way to Oz so it gets expensive. At least you should get a solid return on the Motordyne, not that it's much consolation really.

Hope I can find a way to work with and keep mine. Not giving up just yet!

MoulaZ · 04-25-2017, 03:03 AM

Quote:

Originally Posted by ChaseZ

That's a hard realization to come to. The Motordyne is so sweet. Think I'll try some downstream HFC before I make that call.

Those prices are crazy but I guess everything has to be shipped a long way to Oz so it gets expensive. At least you should get a solid return on the Motordyne, not that it's much consolation really.

Hope I can find a way to work with and keep mine. Not giving up just yet!

Already tried downstream HFCs, wasn't enough.

And yea, shipping alone was $550 USD... I'm asking for $1500 AUD, which will be exactly enough to effectively exchange it for the Invidia with no out of pocket loss, but still pissed I have to let the Motordyne go, because sure as **** I don't want to.

TopgunZ · 04-25-2017, 08:33 AM

That $1.5 to $2K price tag is a hard pill to swallow. Id 100% be going with the CNT before that. It will be tame, cheap and decent quality. I didnt have any fitment issues.

nomodsjk · 04-25-2017, 09:22 AM

I have the stillen sc with the stillen CBE and stillen's non res test pipes and its no where near as loud as some of the other set ups ive heard

Chuck33079 · 04-25-2017, 09:25 AM

I've got the FI 3" exhaust and they added a set of hfcs in the lead pipes. It's the perfect daily driver volume. It's almost a little too quiet now that the Z is a weekend toy, but the cats will come out with the next round of mods. Granted, I've got turbos to muffle the sound somewhat, so your setup with a SC might be perfect.

04-23-2017, 11:18 AM	#17 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	I have the FI 3" exhaust and it is quite a bit quieter than motordyne or the FI 2.5". I it has a nice tone to it and when you get on the throttle it will open up nicely. You may also pick up a few whp with a 3" exhaust! Sent from my SM-N910P using Tapatalk __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

04-24-2017, 04:06 PM	#22 (permalink)
future370zzz Track Member Join Date: Dec 2011 Location: Bay Area Posts: 555 Drives: 10 Nissan 370z Rep Power: 15	I have FI resonated test pipes and FI 18" resonated catback and the drone was getting to me so I added in side branch resonators which made it more bearable and made the exhaust quieter outside. An option would be to restrict the airflow with small diameter pipes and resonated mufflers but that would probably raise temps and pressure. I was actually thinking about switching over to Motordyne to eliminate the drone inside the cabin. If you want to switch exhaust setups let me know.hahaha __________________

04-24-2017, 05:05 PM	#23 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	I had the Motordyne resonated test pipes with the side branch resonators and the FI exhaust with 18" resonators and it still rattled my head. The only way to do it is to add in additional mass in mufflers or downstream cats. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

04-24-2017, 06:14 PM	#24 (permalink)
future370zzz Track Member Join Date: Dec 2011 Location: Bay Area Posts: 555 Drives: 10 Nissan 370z Rep Power: 15	My old Comptech exhaust for my RSX had muffler tip inserts to quiet it down. __________________

04-25-2017, 08:33 AM	#28 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	That $1.5 to $2K price tag is a hard pill to swallow. Id 100% be going with the CNT before that. It will be tame, cheap and decent quality. I didnt have any fitment issues. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

04-23-2017, 12:18 PM	#18 (permalink)
Nismonerd Base Member Join Date: Jan 2016 Location: North Alabama Posts: 37 Drives: 2010 370z Nismo Rep Power: 9	You could simply quiet down the exhaust you have. Take a look at using side branch resonators, it really works and doesn't lower performance. Fancy Tech: How to Get Rid of Exhaust Drone, works great!

04-23-2017, 12:34 PM	#19 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 22	Do you have turbo or supercharger? If you have turbo, is it open dump wastegates? If so that is your issue as to why it's so loud. Sent from my SM-G935T using Tapatalk

04-24-2017, 01:08 AM	#21 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94683	Yes supercharged with an Si trim Vortech, so I'm moving some extra air. Also I'm waiting for TG's A/A kit to show up and air going in can affect the exhaust note a lot so I won't make any decisions until after that's on and see how it is. But in any case the FI resonated test pipes and Motordyne combo is going to be WAY too loud for me. There is zero drone, rasp or anything like that, it's just the volume that is the issue. I could also look st replacing the central Motordyne muffler 2@2.5in and 2@3.0out with something else, but then I really wouldn't know what kind of sound I'd end up with beforehand and then I'd be sort of stuck with it. Love the motordyne exhaust and would hate to see it go but if that ends up being the answer then so be it. Quiet is more important to me right now. Perhaps there is an armytrix type solution I can cut in as well for a bit more restriction for normal driving and can open the valve for the track. I'll have to look into that a bit further. Kind of the opposite of cutouts I guess lol

04-24-2017, 11:05 PM	#25 (permalink)
MoulaZ Base Member Join Date: Jun 2013 Location: Sydney, Australia Posts: 230 Drives: '09 Z34 BP Turbo V2 Rep Power: 25	Looks like I'm going with Invidia. Can't seem to get a Injen into Australia for less than $2K AUD. Can get a local Invidia Q300 for $1.5K. Absolutely gutted, but the Motordyne has to go.

04-25-2017, 09:22 AM	#29 (permalink)
nomodsjk Premium Member Join Date: Apr 2014 Location: martinsburg wv Posts: 2,073 Drives: 2011 370z MB/7at Rep Power: 19962	I have the stillen sc with the stillen CBE and stillen's non res test pipes and its no where near as loud as some of the other set ups ive heard

04-25-2017, 09:25 AM	#30 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	I've got the FI 3" exhaust and they added a set of hfcs in the lead pipes. It's the perfect daily driver volume. It's almost a little too quiet now that the Z is a weekend toy, but the cats will come out with the next round of mods. Granted, I've got turbos to muffle the sound somewhat, so your setup with a SC might be perfect. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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