November 17, 2019, 08:11:16 AM

Author Topic: Mid muffler options  (Read 393 times)

Offline Gunnytron

Mid muffler options
« on: October 07, 2019, 01:56:18 PM »
My current setup is too loud. I have a straight through twin pipe rear muffler with a pointless mid muffler that is barely larger than the 3" pipe work (no cats).

I am going to be fitting a Racing beat twin tip rear muffler, which, from what I hear, is pretty quiet.

What are peoples thoughts on if I will need a mid muffler? I am sure I read somewhere that someone had a vibrant resonator and it didn't make any noticeable difference when removed.

What is a good alternative to the vibrant?

I realise that volume is subjective, but at the moment, I am sure that I am waking the neighbors up as it's a little obnoxious.
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline Exidous

Re: Mid muffler options
« Reply #1 on: October 07, 2019, 03:51:22 PM »
A normal mangaflow straight through muffler works well. I'm using an x-pipe muffler of their's and it was quiet :secret: effective.

I think you'll be surprised at just how quiet the RB catback is especially if you are running cats. I wouldn't and didn't run a mid muffler with the RB catback and was pretty happy. Ended up wanting something a little louder.
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Not too loud with the new resonators!

Offline digitalsolo

  • Administrator
  • Top Fuel
  • Location: Fort Wayne, IN
  • Posts: 22848
  • View Gallery
    • View Profile
    • LS1FC.com
Re: Mid muffler options
« Reply #2 on: October 08, 2019, 08:03:57 AM »
Engine Masters tested the Magnaflow style straight through mufflers and they cost basically 0 HP and made a big decibel reading difference.    If's just a corrugated tube in an oval housing full of baffle.   If you can fit them somewhere, it'll work well without any power cost.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2016 BMW 428i xDrive Gran Coupe - Completely stock...ish

Offline freeskier7791

Re: Mid muffler options
« Reply #3 on: October 08, 2019, 08:18:48 AM »
Engine Masters tested the Magnaflow style straight through mufflers and they cost basically 0 HP and made a big decibel reading difference.    If's just a corrugated tube in an oval housing full of baffle.   If you can fit them somewhere, it'll work well without any power cost.

I feel like those are hard to fit as mid mufflers without sacrificing ground clearance on an FD.  They do work great though!
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT

Offline Supe

Re: Mid muffler options
« Reply #4 on: October 08, 2019, 10:23:32 AM »
If you don't have an X-pipe and can fit one, they help quite a bit, especially when it comes to mellowing things out at "tooling around town" levels. 

Offline MPbdy

Re: Mid muffler options
« Reply #5 on: October 08, 2019, 10:55:54 AM »
Magnaflow has a resonated x-pipe which is great for a center muffler.

Offline Gunnytron

Re: Mid muffler options
« Reply #6 on: October 08, 2019, 11:37:11 AM »
Just to be clear, I don't have a twin system. Its a y into 3" single.
http://www.norotors.com/index.php?topic=12880.0
FD, LS1 running 220 3.90 Trickflow heads, Comp Ultra-gold Arc 1.72 Rockers, 7.550 BTR Pushrods, BTR Stage II NA Cam 227/234 .614"/.576" 113+2, ARP Head Bolts, BTR Platinum Springs, Ported FAST 90, NW 90mm TB, FAST 60lb Injectors, Textralia Clutch/Flywheel, T56, Cobra 8.8, 31 spline, trac-loc 3.55 Diff, Holley HP EFI, Racelogic TC.

Offline digitalsolo

  • Administrator
  • Top Fuel
  • Location: Fort Wayne, IN
  • Posts: 22848
  • View Gallery
    • View Profile
    • LS1FC.com
Re: Mid muffler options
« Reply #7 on: October 08, 2019, 12:24:55 PM »
I used to run a bullet muffler and then a "normal" muffler in line on my FC on a 3" single, it was pretty quiet.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2016 BMW 428i xDrive Gran Coupe - Completely stock...ish

Offline freeskier7791

Re: Mid muffler options
« Reply #8 on: October 08, 2019, 12:35:25 PM »
Just to be clear, I don't have a twin system. Its a y into 3" single.

IF you don't want to run a bullet muffler inline, I believe magnaflow has a muffled y pipe
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT