DIY Turbo Discussion greddy on a 1.8? homebrew kit?
Sponsored by:
Sponsored by:

NC diy turbo, loud exhaust

 
Old 08-20-2018, 07:20 AM
  #1  
yho
Newb
Thread Starter
 
Join Date: Aug 2017
Posts: 4
Total Cats: 0
Default NC diy turbo, loud exhaust

Hello

On my current 3" exhaust set up I have a garrett turbo, one magnaflow metal cat, a long noname glass packed resonator, and 2 short 2.5" noname glass pack muffler. It is really noisy!
Also the drone gives headaches after 20 minutes driving. I drive with hearplugs.
I can go with an helmholtz resonator, but I'm not sure it will be enough.
I would like something that sound a bit closer to stock, like a normal car, whitout robing HP.
What would you recommend?

I found this :

for 330 usd. But from the description I think there is no baffle inside (noisy?). I think fab9 exhaust use the same.

Magnaflow option :
I could use 2 XL muffler #13216 (baffle inside) as exhaust tips


Or I make my twin exhaust join one XL muffler #13288 and I have one single 3" exit:



pics of my current set up

Manifold


downpipe


Midpipe


Muffler

https://goo.gl/photos/XjZDkvU7K9JqUYEw9 Google photos album of my mX5 if interrested

Last edited by yho; 08-20-2018 at 04:02 PM.
yho is offline  
Old 08-20-2018, 08:43 AM
  #2  
Junior Member
 
Join Date: Feb 2014
Location: Columbus, IN
Posts: 317
Total Cats: 33
Default

Part of the reason it's so noisy inside the car is the tailpipe is contacting your bumper, which acts like a megaphone and amplifies the sound inside the car. The exhaust should never touch anything on the car except through isolators (exhaust hangers), so I would check and see if there's anywhere else it's contacting the frame.

As far as mufflers, the big magnaflows are what most people use here.
Engi-ninja is offline  
Old 08-20-2018, 02:27 PM
  #3  
Senior Member
iTrader: (1)
 
Join Date: Jul 2014
Location: Kensington, MD
Posts: 569
Total Cats: -20
Default

Never mind that the one on the left looks like it's directing half the exhaust gases into the bumper cavity, further exacerbating the megaphone effect under the car.

Those glasspacks you have look to have very little additional volume, so I don't know why you'd expect much sound damping from them.
huesmann is offline  
Old 08-21-2018, 08:32 AM
  #4  
yho
Newb
Thread Starter
 
Join Date: Aug 2017
Posts: 4
Total Cats: 0
Default

I checked online and magnaflow 12579 is recommend, I keep you updated
yho is offline  
Old 08-21-2018, 03:24 PM
  #5  
Senior Member
 
Join Date: May 2017
Posts: 556
Total Cats: -28
Default

You are literally melting plastic under your car with the horrible placement of those mufflers. The exhaust looks good until you realize its just melting **** under your car. Stick it out past the bumper that will reduce the drone and it wont melt stuff.
andyfloyd is online now  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
krissetsfire
Engine Performance
9
05-13-2014 11:39 AM
Exhondaman
General Miata Chat
32
07-19-2007 05:05 AM
Pitlab77
Insert BS here
105
06-15-2007 05:13 PM
2Zooms!
Prefabbed Turbo Kits
14
04-05-2007 05:55 PM
Mimime
General Miata Chat
0
12-07-2006 10:09 AM


Thread Tools
Search this Thread
Quick Reply: NC diy turbo, loud exhaust


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.