RevWorks UEL Headers, Nameless Downpipe/Axelback = TONS of Rasp!

[flashburn]

Originally Posted by wrussi

ok Guys i am happy to announce that the rasp on my car is completely gone!
my current setup is: revworks header/plm overpipe/nameless catted front pipe/invidia Q300 cat back
the car sounds amazing! cold starts are a bit loud but not a bit of rasp and now no matter what rpm you press the gas there are no more annoying old car farts. this exhaust is very deep and quiet which was exactly what i was looking for. the car sounds the way it should have come from the factory. nice deep subie rumble with no drone at cruising speeds.

so definately the weak part was the oem catback. it seems its not able to handle the extra flow/different pulsations from the uncatted UEL.

Nice. I ordered the Perrin 2.5" Resonated, so hopefully that gets me rasp-free as well.

[flashburn]

This blows. Just put on the Perrin Catback, and guess what, the rasp is STILL there! What the fuck? So now I'm thinking maybe I should just go back to stock front/over/mid pipes and just stick with the RevWorks UEL's and the Nameless Axelback. Which sucks, I really wanted to squeeze out all the performance I can out of this engine.

I don't understand, since I know people have the same setup of Perrin 2.5", RevWorks UEL's, and the Nameless Front/Over with no rasp. Could the Helmholtz somehow be causing rasp? Seems counter-intuitive.

[flashburn]

Originally Posted by tonystewart

Perrin Resonated Catback doesn't get rid of rasp, i stated that in post #24
wrussi stated the factory catback was the weak link, I believe his assessment is inaccurate

You might of said it, but @industrial said it would, as have others. Also plenty of people said the factory catback with UEL headers/front/over has rasp.

This engine... sucks.

[jflogerzi]

Can someone post a good and clear video on the FA20 engine with rasp. My current setup is a Borla UEL, Motiv OP, Stock Front pipe, Perrin 2.5inch CB resonated. I still don't understand what the rasp sounds like.

[FR-S Matt]

Originally Posted by jflogerzi

Can someone post a good and clear video on the FA20 engine with rasp. My current setup is a Borla UEL, Motiv OP, Stock Front pipe, Perrin 2.5inch CB resonated. I still don't understand what the rasp sounds like.

Here, this is rasp on my old 3"

[ame="http://www.youtube.com/watch?v=QrR42x_MVIs"]JDL UEL catless header + Nameless Full 3" Headerback Exhaust - YouTube[/ame]

Here is my current N1 setup.


[ame="http://www.youtube.com/watch?v=arXr-sJuH1M"]JDL UEL Catless Header + JDL Overpipe + Invidia Catted Fron - YouTube[/ame]


Hear the difference?

[Basket Case]

Originally Posted by FR-S Matt

Here, this is rasp on my old 3"

Here is my current N1 setup.

Hear the difference?

how much drone is there with your N1 and UEL setup? I keep going back and forth on what type of exhaust to get and its killing me because i can't seem to decide. I want a louder exhaust, but i don't want drone.

[jflogerzi]

Originally Posted by FR-S Matt

Here, this is rasp on my old 3"

Here is my current N1 setup.

Hear the difference?

yes big difference. First setup had a very rough, course sound. Not very pleasant. Second i much better. I think having the stock front pipe really kills alot of rasp from the headers. I need to get some decent rolling clips and a stationary one. Just need a decent video camera with a decent mic for SQ.

[SirBrass]

Originally Posted by industrial

Sell the axleback and buy the 2.5inch Perrin resonated catback. I had a the same setup (jdl instead of rev headers) and the same issues. Sounds much better now. People have had success with the invidia q300 as well.

Thanks for the heads up! I think I'll just get their fp/op (catted and resonated) instead of their axleback, and go with a Q300 or Perrin catback. Still debating on whether to go JDL or NP for the header.

[Dr. BRZ]

so basically all of you guys are saying nameless the mighty and powerful isnt so much when it comes to noise and headers? remember this peeps when you consider nameless all the way. lesson learned.

[FR-S Matt]

Originally Posted by Basket Case

how much drone is there with your N1 and UEL setup? I keep going back and forth on what type of exhaust to get and its killing me because i can't seem to decide. I want a louder exhaust, but i don't want drone.

Don't did this setup then. Has some drone because of that extremely deep, bass line tone. I don't mind it because the sound is right where I want it. Might be worth trying this with a Nameless DP/OP with a Helmholtz to see if the drone is eliminated.

[FR-S Matt]

Originally Posted by Dr. BRZ

so basically all of you guys are saying nameless the mighty and powerful isnt so much when it comes to noise and headers? remember this peeps when you consider nameless all the way. lesson learned.

They still make the best DP/OP on the market as "bang for your buck" with minimal bends and an optional Helmholtz resonator. Their axlebacks just don't have much muffle because they are small mufflers. 3" exhausts just sound bad when they are loud. I've even heard a 3" Perrin resonated that had rasp from a Borla UEL. Beat to just stick to 2.5" until you want a turbo.

[Basket Case]

Originally Posted by FR-S Matt

Don't did this setup then. Has some drone because of that extremely deep, bass line tone. I don't mind it because the sound is right where I want it. Might be worth trying this with a Nameless DP/OP with a Helmholtz to see if the drone is eliminated.

I guess when I say I don't want drone, I don't want tons of it. Let me give you and sample since it's so hard to try and convey something lie this over a forum.

I used to daily drive (100 miles + a day) a mustang gt with a carless x pipe (all 4 cats deleted) and flow master 40's (1 step quitter then their loudest 10 series single chamber mufflers). I loved how the car sounded, and could tolerate the drone to a degree, but it was so much that I always had to yell at my fiancé sitting next to me, and I could barely talk on the phone.

Is your setup like that, or just a little drone?

[flashburn]

Originally Posted by tonystewart

The Nameless Performance and/or the JDL Design uncatted Equal Length Header with a proper tune will produce rasp and drone, it is the nature of the exhaust pulse.

Nameless Overpipe/DownPipe/Frontpipe Catted all-in-one with a Helmholtz Resonator is the first logical step. Call this section drone and rasp reduction 1.

What you placed afterwards defines what is in front of it.
I had the Perrin resonated Catback 2.5" and it was too loud.
The stock exhaust reduced the sound level to a tolerable WOT and a quiet cruise.

It must depend on the headers, but with the RevWorks headers I have a high amount of rasp regardless of the Nameless or Perrin exhaust. Also as I mentioned in the original post, I already have the Nameless Overpipe with Helmholtz.

[flashburn]

Originally Posted by tonystewart

Is it catted?

Sent from my Nexus 5 using Tapatalk

Yes it's catted. No tune yet, since I'm still trying to lock down on the parts I want to go with. So rasp can change with a tune? That sounds... odd.