Notices

Exhaust on a 991.2 cup

 
Old 04-21-2019, 09:31 PM
  #1  
stujelly
Addict
Rennlist Member
Thread Starter
 
stujelly's Avatar
 
Join Date: Dec 2009
Location: Bakersfield, CA
Posts: 2,493
Default Exhaust on a 991.2 cup

I have a stock 2018 991.2 cup from Europe that I just got and it came with a center muffler.

Is there any performance increase by running the open (super cup) exhaust in lieu of running the center muffler?

Last edited by stujelly; 04-30-2019 at 03:45 AM.
stujelly is offline  
Old 04-21-2019, 09:35 PM
  #2  
redmonkey928
Addict
Rennlist Member
 
redmonkey928's Avatar
 
Join Date: Aug 2014
Posts: 1,607
Default

Center muffler actually produces more power than the supercup pipes.
redmonkey928 is online now  
Old 04-24-2019, 09:49 AM
  #3  
JCL59
Addict
Rennlist Member
 
JCL59's Avatar
 
Join Date: Jan 2013
Location: 75 mi from Mid-Ohio
Posts: 478
Default

I believe all us cars were delivered w straight pipes. IMSA Platinum / GTC7 spec will require these if you plan on joining us.. Livery looks damn good btw I recognized it at road atl but didn't know that was you. Best of luck with it!
JCL59 is offline  
Old 04-29-2019, 09:59 AM
  #4  
Nizer
Addict
Rennlist Member
 
Nizer's Avatar
 
Join Date: Feb 2006
Location: Beta Testing
Posts: 10,861
Default

Originally Posted by redmonkey928 View Post
Center muffler actually produces more power than the supercup pipes.
I've always been told Supercup exhaust produces an extra 5hp.
Nizer is offline  
Old 04-29-2019, 10:22 AM
  #5  
redmonkey928
Addict
Rennlist Member
 
redmonkey928's Avatar
 
Join Date: Aug 2014
Posts: 1,607
Default

Originally Posted by Nizer View Post
I've always been told Supercup exhaust produces an extra 5hp.
I have been told the opposite - from Cup's that have been on the dyno the rear center muffler/side bypass pipes produce the highest output. Supercup drops the power slightly (assuming drop in back pressure, but couldnt confirm this as have been told by a few shops that work with these regularly).
redmonkey928 is online now  
Old 04-29-2019, 03:03 PM
  #6  
JDX Racing
User
 
Join Date: May 2013
Location: Colorado
Posts: 21
Default

It's a PMNA question... because it all depends on which engine map is loaded in the ECU.
JDX Racing is offline  
Old 04-30-2019, 03:49 AM
  #7  
stujelly
Addict
Rennlist Member
Thread Starter
 
stujelly's Avatar
 
Join Date: Dec 2009
Location: Bakersfield, CA
Posts: 2,493
Default

Originally Posted by JDX Racing View Post
It's a PMNA question... because it all depends on which engine map is loaded in the ECU.
great point, I guess the only way to determine which map is loaded on my car is to have pmna plug into it at my next event.
stujelly is offline  
 


Thread Tools
Search this Thread

Contact Us - About Us - 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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: