Way too loud. Best fix for minimal impact?

[mad_sb]

Originally Posted by transition

So i finally have the car all setup with JDL headers, over pipe, front pipe and a Perrin 3" resonated exhaust. And holy shit is this thing LOUD. Embarrassingly loud over 3k RPM's. So now i need to figure out the best way to tame this thing while minimizing losses. I'm thinking the stock catback system might be the way to go here. Anyone else gone through the same issue?

Q300, or loose the header. I tried everything with my fa20 long tube. quickest solution is either stock catback or q300. We need some dyno tests with stock catback vs q300 when the rest of the exhaust has been modified like yours or mine.

[mad_sb]

Originally Posted by 1Cor10:23

Have you considered running a combination of headers + 3" CBE but leaving dp/op stock? I think the stock pieces are realistically just above 2" for those sections due to random divets for clearance

I could feel the power loss when i swapped my nameless 2.5" over front pipe for an HKS resonated front pipe and motive over pipe. This was on fa20 longtube header, nameless over / front, custom 2.5" single exit catback. Power cam right back when i put the nameless pipe back on. The HKS flows better than stock since it has no cat and 2 resonators, but i still felt the loss in power.

I think the catback is where it's at for keeping the volume and rasp reasonable with headers.

[FR-S Matt]

Stay away from 3" on NA. It's raspy and hard to control a good sound with a UEL. Even if you throw all sorts of resonators at it and use a 3" Perrin resonated catback, you can get rasp from the pipe size. I since switched to a full Invidia system with my catless JDL UEL, JDL overpipe, Invidia catted front pipe, and N1 catback and it's AWESOME. Yes, it's loud, but a deep loud. Absolutely 0 rasp. My favorite setup so far. It's not embarrassingly loud like my Nameless 3" was with the rasp. Sounded like a mexican fartcan done at Jose's shop for $20.

I've considered going with the Nameless DP/OP and helmholtz, but my current setup works well and I like my ceramic coated overpipe.

[transition]

Put the stock catback back on. Definitely significantly quieter although the sound is shit now. Sounds really raspy. Debating what phase 3 will be.

[CodyFRS]

[ame="https://www.youtube.com/watch?v=mRPucHnMVxI"]Borla UEL Headers, Private Label OP, Invidia Catless FP, J2 Quad Tip Catback - YouTube[/ame]

Cold Start and 4k rpm revs, 1 rev getting 5k rpm.. Once you fully mod your exhaust, it will be crazy loud.

[Freeman]

Originally Posted by FR-S Matt

It's not embarrassingly loud like my Nameless 3" was with the rasp. Sounded like a mexican fartcan done at Jose's shop for $20.

Wow. I've never heard someone hate on Nameless like that.

[xwd]

Originally Posted by Freeman

Wow. I've never heard someone hate on Nameless like that.

That's not bashing on Nameless really, there are just some combinations of exhaust products which are really loud and produce a lot of rasp. Headers are the main culprit/originators of the rasp. Nameless with an otherwise stock exhaust is fine.


I have the catted P&L header and with the Tome front pipe and 2.5" Perrin non-resonated catback and it sounded terrible, with the stock front pipe not as bad.. I am swapping in a resonated Perrin pipe in tomorrow.

[WithNolock]

So I have the exact same set up as you do with the exception of my Perrin catback being 2.5. It's very quiet. No drone, no rasp. Huge difference compared to the Agency Power catback I had before that was setting off car alarms and exploding the heads of small dogs and infants.

[Sirsimon]

Originally Posted by transition

Yea i mean i'm literally sitting here with my ears ringing from a half-hour drive. It's like the BRZ Tinnitus edition now.

I can offer you no help, but this thread was worth it just for this quote. :-)

[Sirsimon]

Originally Posted by WithNolock

Huge difference compared to the Agency Power catback I had before that was setting off car alarms and exploding the heads of small dogs and infants.

OK, so two hilarious quotes in this thread. You people crack me up.

[XanRules]

Originally Posted by CodyFRS

Cold Start and 4k rpm revs, 1 rev getting 5k rpm.. Once you fully mod your exhaust, it will be crazy loud.

yeah, but everyone can reasonably expect a system with no cats and no resonators to be loud as balls.

[IAmNotTheDriftKing]

Get the Perrin 2.5" resonated. I got mine used for about 500 bucks, great deal! Really keeps the UEL headers quiet but loud at WOT.

[FR-S Matt]

Originally Posted by Freeman

Wow. I've never heard someone hate on Nameless like that.

Nameless makes amazing products, don't get me wrong. A 3" exhaust on N\A just sounds like shit. Some may not care about that and want the pure performance of it. Their header is top notch, and the quality of their welds is incredible.

[AZFA20]

Unfortunately this is a common and often chased side effect for anything supercharged while trying to maintain a good free flowing exhaust. Really the only thing you can do is add additional muffler/s and resonator/s to the equation but generally speaking there is little you can do when supercharged. On other builds I have done w/ superchargers I have had good luck taming the sound with Magnaflow 24+" round resonators. I have used that particular series for the exact complaint and requested price point, quieter and as cheap as possible without going for complete junk. A lot of people like the Vibrant Ultra Quiet series resonators as well. Good luck with whatever route you consider but these are just some suggestions. All else fails you can go back to a more conservative muffler design similar to stock but you will lose some flow capability as a result of the superior sound deadening.