Turbo with two stage exhaust - RX8Club.com

Series I Major Horsepower Upgrades This is the place to discuss Super Chargers and Turbos, Nitrous, Porting, etc
Sponsored by:

Turbo with two stage exhaust

Reply

 
 
 
Old 06-25-2016, 10:53 PM
  #1  
Boosted Kiwi
Thread Starter
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 17,996
Thanked 156 Times in 116 Posts
Turbo with two stage exhaust

This is the exhaust system I recently fitted . It is still a work in progress because I'm not really happy with the tone or the loudness of it . I'm sure with an extra muffler and some tweaks it will sound better .
Reason for doing it was to reduce turbine backpressure mainly as I found that at 400whp the 3" system wasn't doing the job well enough . This setup cut backpressure by a good 5psi at the turbine.
Also I wanted the novelty of having a loud exhaust on demand .
Left side is main 3" exhaust and is nice and quiet for around town and trips. Right side is wastegate only so there is no flow until turbo reaches the set boost pressure.









This is at 4 psi boost:

At 15psi boostpressure :

Last edited by Brettus; 11-02-2016 at 02:17 PM.
Brettus is offline  
Reply With Quote
Old 06-26-2016, 02:26 AM
  #2  
El Jefe
 
yomomspimp06's Avatar
 
Join Date: Mar 2007
Posts: 1,791
Thanked 3 Times in 3 Posts
that sounds a lot better than I thought it would
yomomspimp06 is offline  
Reply With Quote
Old 06-26-2016, 03:21 PM
  #3  
Boosted Kiwi
Thread Starter
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 17,996
Thanked 156 Times in 116 Posts
Originally Posted by yomomspimp06 View Post
that sounds a lot better than I thought it would
It sounds quite good from inside the car actually . Just too loud and too much of a staccato . I think I can improve both of those things ...hopefully ending up with something pretty cool.
Brettus is offline  
Reply With Quote
Old 06-26-2016, 03:47 PM
  #4  
New Member
 
Join Date: Jun 2016
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Nice!!!
SmokySTI is offline  
Reply With Quote
Old 06-26-2016, 04:09 PM
  #5  
Registered
iTrader: (45)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,731
Thanked 323 Times in 264 Posts
Sounds good man.
9krpmrx8 is offline  
Reply With Quote
Old 06-26-2016, 05:28 PM
  #6  
El Jefe
 
yomomspimp06's Avatar
 
Join Date: Mar 2007
Posts: 1,791
Thanked 3 Times in 3 Posts
I've probably watched this 30 times in the last 10min. The more I listen the more I like it.
yomomspimp06 is offline  
Reply With Quote
Old 06-27-2016, 04:13 PM
  #7  
Boosted Kiwi
Thread Starter
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 17,996
Thanked 156 Times in 116 Posts
It's kinda cool to be able to emit a very loud noise at will .........LOL

From inside it sounds a bit like a high revving v8 on launch control . It's really a LOT louder than that video suggests .

Last edited by Brettus; 06-27-2016 at 04:20 PM.
Brettus is offline  
Reply With Quote
Old 06-29-2016, 07:03 PM
  #8  
Registered
 
Join Date: Mar 2015
Posts: 114
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by Brettus View Post
It's kinda cool to be able to emit a very loud noise at will .........LOL

From inside it sounds a bit like a high revving v8 on launch control . It's really a LOT louder than that video suggests .
If you dont like it that much ill take it

tbiggybig is offline  
Reply With Quote
Old 07-14-2016, 10:06 AM
  #9  
Registered
 
yurcivicsux's Avatar
 
Join Date: Feb 2009
Location: North Toronto
Posts: 529
Thanks: 0
Thanked 0 Times in 0 Posts
nice work........
yurcivicsux is offline  
Reply With Quote
Old 07-15-2016, 01:15 AM
  #10  
Zoom-Freakin'-Zoom
iTrader: (5)
 
swoope's Avatar
 
Join Date: Jan 2004
Location: orlando, fl
Posts: 14,507
Thanked 6 Times in 6 Posts
nice,

i have missed much.

beers
swoope is offline  
Reply With Quote
Old 07-17-2016, 07:51 PM
  #11  
Boosted Kiwi
Thread Starter
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 17,996
Thanked 156 Times in 116 Posts
Doing this is fun ..........

Brettus is offline  
Reply With Quote
Old 07-17-2016, 07:57 PM
  #12  
Boosted Kiwi
Thread Starter
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 17,996
Thanked 156 Times in 116 Posts
And another one
Brettus is offline  
Reply With Quote
Old 10-26-2016, 10:46 PM
  #13  
Boosted Kiwi
Thread Starter
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 17,996
Thanked 156 Times in 116 Posts
Added a resonator to the wastegate side . Much happier with sound . Still loud but not obnoxious like it was .

Brettus is offline  
Reply With Quote
Old 10-27-2016, 11:38 AM
  #14  
Registered
iTrader: (45)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,731
Thanked 323 Times in 264 Posts
Sounds mean, I like it.
9krpmrx8 is offline  
Reply With Quote
Old 07-11-2018, 03:50 PM
  #15  
TayfuN
 
Join Date: Sep 2012
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Just curios why no one done that before on RX-7 or RX-8 to split exhaust pipes on stock rotary engine like here except without turbo (only rx-8 related).

Also any update on this build?
Kirill Morozov is offline  
Reply With Quote
Reply
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dokuji
Series I Trouble Shooting
5
07-29-2016 11:57 AM
GK1707
RX-8 Parts For Sale/Wanted
4
07-16-2016 11:51 AM
tbiggybig
Series I Aftermarket Performance Modifications
46
06-28-2016 11:21 PM
CRAZ8
Series I Trouble Shooting
0
06-19-2016 05:26 AM
zombiefett
New Member Forum
0
06-11-2016 07:37 AM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread: