i-Club - The Ultimate Subaru Resource

Aftermarket Forced Induction - Turboed factory NA engines Turbo EJ25! Who said that all Subarus are created equal? Aftermarket turbochargers on factory normally-aspirated engines (factory turbo engines have their own forums).

2.5" VS 3" exhaust?

Thread Tools
 
Search this Thread
 
Old 02-21-2006, 11:49 AM
  #1  
Registered User
Thread Starter
 
impreza25rstn's Avatar
 
Join Date: Jan 2006
Location: South Florida
Posts: 171
Car Info: 98 Impreza Hybrid
2.5" VS 3" exhaust?
like it staes, 2.5" VS 3" exhaust pipes. I currently have 2.5" exhaust from the turbo back. Would I see any kind of benefit or negatives from changing the pipes to a 3" pipe? better top end? loss of torque? any imput is appreciated.
impreza25rstn is offline  
Reply
Old 02-26-2006, 09:53 AM
  #2  
Registered User
Thread Starter
 
impreza25rstn's Avatar
 
Join Date: Jan 2006
Location: South Florida
Posts: 171
Car Info: 98 Impreza Hybrid
any one know?
impreza25rstn is offline  
Reply
Old 03-08-2006, 03:43 PM
  #3  
Registered User
iTrader: (4)
 
STi-owns-evo's Avatar
 
Join Date: Mar 2003
Location: East Bay / Pomona
Posts: 3,670
Car Info: '02 PSM WRX
Depends on what kind of car you have. Usually with turbo you want a 3" while a N/A the biggest you'll need is a 2.5"
STi-owns-evo is offline  
Reply
Old 03-09-2006, 03:47 PM
  #4  
Registered User
iTrader: (1)
 
Weak Sauce's Avatar
 
Join Date: Jan 2005
Posts: 164
I've seen that 2.5" exhausts have a smoother acceleration profile, even with a turbo. Torque curves are not as high but are much flatter.
Weak Sauce is offline  
Reply
Old 03-09-2006, 04:44 PM
  #5  
Registered User
iTrader: (14)
 
Shane Morris's Avatar
 
Join Date: Jul 2004
Location: Under the Truck
Posts: 419
Car Info: 05 wrx
Well, I've had a few set ups on my wrx. Judging by your screen name, you have a turboed rs. If that is so, and you are running low amounts of boost, then I would just stick with the 2.5" straight through exhaust. If you are running higher boost levels (1+ bar) then I would go with the 3"
Shane Morris is offline  
Reply
Old 03-10-2006, 07:55 AM
  #6  
Registered User
Thread Starter
 
impreza25rstn's Avatar
 
Join Date: Jan 2006
Location: South Florida
Posts: 171
Car Info: 98 Impreza Hybrid
k thanks, yeah i am only running 6 psi
impreza25rstn is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
WTT/FS: "RARE" GOLD advan rg 17"x7.5" 5x100 "Discontinued"
itzpoorboy
NorCal Classifieds
17
07-02-2012 09:12 AM
WTT/FS: "RARE" GOLD advan rg 17"x7.5" 5x100 "Discontinued"
itzpoorboy
NorCal Classifieds
12
06-15-2012 10:03 PM
"RARE" GOLD advan rg 17"x7.5" 5x100 "Discontinued" (PRICE REDUCED)
itzpoorboy
SoCal Classifieds
0
06-14-2012 01:55 AM
"chip" "ecu" "software" wutever u wanna call it
jyhighsky
Engine Management
7
01-25-2006 10:02 PM
"Hey guys, we're broke." "Let's go suck d*cks for money!" "Good idea!"
soundwave
Dumpster
7
02-21-2004 11:53 AM
Tags
Back to Subforum
Aftermarket Forced Induction - Turboed factory NA engines
View Next Unread
Help! turbo problems




Advanced Search
Quick Reply: 2.5" VS 3" exhaust?


Reply Closed Thread Share

All times are GMT -7. The time now is 06:28 AM.