Exhaust too loud

Spartan 1771 · 12-30-2021, 04:53 PM

If max power if your top priority, then anything you do at this point to lower the drone will decrease power.

As others have suggested, ART pipes should help. If they aren't enough, maybe consider a different CBE, such as a Fast Intentions with resonators. The combination of the resonators and ART pipes should definitely solve your issue.

spoolin03 · 12-30-2021, 04:54 PM

The FI 2.5" system seems like the best bet from what I've seen.

The design is very similar to OEM

The flow also seems to be reasonably good

Does this system drone even with the resonators?

Spartan 1771 · 12-30-2021, 04:59 PM

Quote:

Originally Posted by spoolin03

The FI 2.5" system seems like the best bet from what I've seen.

The design is very similar to OEM

The flow also seems to be reasonably good

Does this system drone even with the resonators?

The design adds quite a bit of power over stock, but as far as drone is concerned with the resonators, I can't answer that. My FI set up doesn't have resonators. I wanted max power, regardless of drone. My Z isn't my daily driver.

Rusty · 12-30-2021, 05:10 PM

I have the FI lth's with the 12" resonators. There is some drone around 2500 rpm. The 18" resonators take most of it alway. The FI CBE is a true dual exhaust.

redondoaveb · 12-30-2021, 08:07 PM

Quote:

Originally Posted by Rusty

I have the FI lth's with the 12" resonators. There is some drone around 2500 rpm. The 18" resonators take most of it alway. The FI CBE is a true dual exhaust.

That's where my FI got drone was at 2500 rpm

spoolin03 · 12-30-2021, 04:56 PM

The Motordyne y-pipe is restrictive since the dual 2.5" pipes are forced to converge into 3" space twice

DrBacon · 12-30-2021, 08:33 PM

Quote:

Originally Posted by spoolin03

The Motordyne y-pipe is restrictive since the dual 2.5" pipes are forced to converge into 3" space twice

It's a single merge and is more than enough for any N/A or mild boost application. Keep in mind oem header design have an output of 2.25"

But I do agree, F.I. is probably the best flowing exhaust on the market.

Spartan 1771 · 12-30-2021, 05:03 PM

and as far as FI vs stock CBE is concerned, I don't think their design is very similar at all. The stock system is a Y-pipe, has a lot more bends and weighs considerably more.

Rjk370z · 01-01-2022, 11:00 AM

I had a similar issue when I got my car. It had a resonated catless downpipe. Man, it was loud and I could not take it. Put the stock cats back on, much more manageable. Can you try putting the stock cats back on and giving it a try?

370z_stillen · 01-01-2022, 11:42 AM

Quote:

Originally Posted by Rjk370z

I had a similar issue when I got my car. It had a resonated catless downpipe. Man, it was loud and I could not take it. Put the stock cats back on, much more manageable. Can you try putting the stock cats back on and giving it a try?

Will try to add resonators first, if not, plan b and will look for cats

FrankEtier · 01-01-2022, 04:26 PM

I have the Greddy Evolution GT dual exhaust with motordyne Art pipes. Sounds great but is fairly loud and does drone at 3K rpm in my car.

spoolin03 · 01-02-2022, 01:33 PM

Quote:

Originally Posted by FrankEtier

I have the Greddy Evolution GT dual exhaust with motordyne Art pipes. Sounds great but is fairly loud and does drone at 3K rpm in my car.

thank you for that. That one becomes 3 in duals at the end which is why they're louder im guessing.

spoolin03 · 01-02-2022, 01:34 PM

It drones even with the supercharger?

FrankEtier · 01-03-2022, 09:28 PM

Quote:

Originally Posted by spoolin03

It drones even with the supercharger?

Yes.

12-30-2021, 04:53 PM	#1 (permalink)
Spartan 1771 A True Z Fanatic Join Date: Nov 2009 Location: Western Maryland Posts: 1,279 Drives: Wife crazy & 09 370Z Rep Power: 105454	If max power if your top priority, then anything you do at this point to lower the drone will decrease power. As others have suggested, ART pipes should help. If they aren't enough, maybe consider a different CBE, such as a Fast Intentions with resonators. The combination of the resonators and ART pipes should definitely solve your issue. __________________ ~Rob -DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...

12-30-2021, 05:10 PM	#4 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,497 Drives: 2011 Nismo GM 6M Rep Power: 2684438	I have the FI lth's with the 12" resonators. There is some drone around 2500 rpm. The 18" resonators take most of it alway. The FI CBE is a true dual exhaust. Spartan 1771, redondoaveb and spoolin03 like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

12-30-2021, 05:03 PM	#8 (permalink)
Spartan 1771 A True Z Fanatic Join Date: Nov 2009 Location: Western Maryland Posts: 1,279 Drives: Wife crazy & 09 370Z Rep Power: 105454	and as far as FI vs stock CBE is concerned, I don't think their design is very similar at all. The stock system is a Y-pipe, has a lot more bends and weighs considerably more. redondoaveb, Mr.K and spoolin03 like this. __________________ ~Rob -DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...

01-01-2022, 11:00 AM	#9 (permalink)
Rjk370z Base Member Join Date: Dec 2021 Location: Sacramento Posts: 120 Drives: 370z touring sport Rep Power: 10819	I had a similar issue when I got my car. It had a resonated catless downpipe. Man, it was loud and I could not take it. Put the stock cats back on, much more manageable. Can you try putting the stock cats back on and giving it a try? 370z_stillen likes this. __________________

01-01-2022, 04:26 PM	#11 (permalink)
FrankEtier Base Member Join Date: Jul 2019 Location: McKinney, TX Age: 49 Posts: 145 Drives: 2014 370Z SC Rep Power: 11606	I have the Greddy Evolution GT dual exhaust with motordyne Art pipes. Sounds great but is fairly loud and does drone at 3K rpm in my car. spoolin03 likes this. __________________ ‘14 Topgunz Speedworks Rotrex Supercharged VR30 7AT 370Z Magma Red. @liquid.magma

12-30-2021, 04:54 PM	#2 (permalink)
spoolin03 Base Member Join Date: Jul 2021 Location: . Posts: 52 Drives: . Rep Power: 6715	The FI 2.5" system seems like the best bet from what I've seen. The design is very similar to OEM The flow also seems to be reasonably good Does this system drone even with the resonators?

12-30-2021, 04:56 PM	#6 (permalink)
spoolin03 Base Member Join Date: Jul 2021 Location: . Posts: 52 Drives: . Rep Power: 6715	The Motordyne y-pipe is restrictive since the dual 2.5" pipes are forced to converge into 3" space twice

01-02-2022, 01:34 PM	#13 (permalink)
spoolin03 Base Member Join Date: Jul 2021 Location: . Posts: 52 Drives: . Rep Power: 6715	It drones even with the supercharger?

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