911tuning vs Europipe Loud
Registered User
Joined: Jan 2007
Posts: 10,774
From: OR Room 5
Rep Power: 1007
mr Bob, with all due respect you dont need to be a rocket scientist to look at the two and tell right away which is less restrictive .
secondly ,i dont need numbers to tell me which is less restrictive, numbers are just numbers that can be made to whatever someone wants, i have NEVER seen the europipe make big boy numbers ,marks does on alot of cars not just one.
and lastly ,i have personaly seen the europipe CHOKE on high horsepower applications !!
secondly ,i dont need numbers to tell me which is less restrictive, numbers are just numbers that can be made to whatever someone wants, i have NEVER seen the europipe make big boy numbers ,marks does on alot of cars not just one.
and lastly ,i have personaly seen the europipe CHOKE on high horsepower applications !!
Restriction and back pressure is the same - whether or not it is high horsepower or not. The number does not change just because your boost pressure or air flow is greater, only it's influence on temperature as EGTs climb.
An exhaust's backpressure dictates the pressure ratio across the turbine - the turbine needs to be able to do the most amount of work possible with the available inlet pressure. This number is relatively constant....ie for a given turbine inlet pressure, you will get the highest pressure ratio across the turbine when you have the lowest possible discharge pressure. I think it is just as important to see the numbers behind back pressure, as it not only influences the HP and torque, but also on temperatures IATs and heat cycling with repeated use. A single run on a dynometer or a high velocity run is only part of the equation.
The reason for using a low restriction exhaust on a turbo application is to reduce the back pressure as much as possible - I don't think it is unreasonable to compare actual data...we do this for compressor maps for turbochargers, IATs for intercoolers, and unsprung weight for suspension components. I hope Marek doesn't take this as a bash against his fabrication or design...on the contrary, I had never been happier with the exhaust he made for me. I'm just a numbers kind of guy, and a dyno run is one component of the big picture.
Last edited by bbywu; Sep 9, 2011 at 12:12 PM.
Registered User
Joined: Sep 2006
Posts: 7,481
Rep Power: 707
We're having an adult conversation - I'm good with everything you are saying.
Restriction and back pressure is the same - whether or not it is high horsepower or not. The number does not change just because your boost pressure or air flow is greater, only it's influence on temperature as EGTs climb.
An exhaust's backpressure dictates the pressure ratio across the turbine - the turbine needs to be able to do the most amount of work possible with the available inlet pressure. This number is relatively constant....ie for a given turbine inlet pressure, you will get the highest pressure ratio across the turbine when you have the lowest possible discharge pressure. I think it is just as important to see the numbers behind back pressure, as it not only influences the HP and torque, but also on temperatures IATs and heat cycling with repeated use. A single run on a dynometer or a high velocity run is only part of the equation.
The reason for using a low restriction exhaust on a turbo application is to reduce the back pressure as much as possible - I don't think it is unreasonable to compare actual data...we do this for compressor maps for turbochargers, IATs for intercoolers, and unsprung weight for suspension components. I hope Marek doesn't take this as a bash against his fabrication or design...on the contrary, I had never been happier with the exhaust he made for me. I'm just a numbers kind of guy, and a dyno run is one component of the big picture.
Restriction and back pressure is the same - whether or not it is high horsepower or not. The number does not change just because your boost pressure or air flow is greater, only it's influence on temperature as EGTs climb.
An exhaust's backpressure dictates the pressure ratio across the turbine - the turbine needs to be able to do the most amount of work possible with the available inlet pressure. This number is relatively constant....ie for a given turbine inlet pressure, you will get the highest pressure ratio across the turbine when you have the lowest possible discharge pressure. I think it is just as important to see the numbers behind back pressure, as it not only influences the HP and torque, but also on temperatures IATs and heat cycling with repeated use. A single run on a dynometer or a high velocity run is only part of the equation.
The reason for using a low restriction exhaust on a turbo application is to reduce the back pressure as much as possible - I don't think it is unreasonable to compare actual data...we do this for compressor maps for turbochargers, IATs for intercoolers, and unsprung weight for suspension components. I hope Marek doesn't take this as a bash against his fabrication or design...on the contrary, I had never been happier with the exhaust he made for me. I'm just a numbers kind of guy, and a dyno run is one component of the big picture.
im familiar with all of this and i know why we use a less restrictive exhaust on turbo applications, its basic stuff was one of the basic books i read many years ago i think by corky bell. but good info non the less.
i know you are a numbers type of guy , and thats fine. I still stand by my first post.
Registered User
Joined: Jan 2006
Posts: 5,710
From: MPLS, MN USA
Rep Power: 466
I concur. And I was a certifiable exhaust maniac. I had everything from Europipe, to Switzer and everything in between. I would suggest listening to one before purchasing. Markski will treat you right. Good luck.
Registered User
Joined: Jun 2007
Posts: 610
From: germany
Rep Power: 64
the 911tuning muffler design vs europipe shows me enough.....europipe is heavy and dont look racing like...simple but the truth....if german tüv dont f... .me i would go with 911tuning exhaust
. Markski?
LOL
IM working on a demo that will have no more then 5 miles on it... If someone else will not snag it Ill keep you in mind...
IM working on a demo that will have no more then 5 miles on it... If someone else will not snag it Ill keep you in mind...
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Thread Starter
|
Registered User
Joined: Aug 2011
Posts: 273
From: Washington State
Rep Power: 25
I am interested in the 3 inch X-pipe system with 100 cell cats. My GT2 should arrive next Tues. / Thurs., I am 99% sure it has stock exhaust, let me know.
Finally heard a Markski 3'' cat system system on a k24/18g car the other day. ...It sounded great....I picked my Milltek because I wanted to keep it toned down and gain more power then my old Cargraphics,,,BUT I think I might reconsider now having his system, even though it is bit louder.......lol.......
Registered User
Joined: Jan 2009
Posts: 2,251
Rep Power: 166
Finally heard a Markski 3'' cat system system on a k24/18g car the other day. ...It sounded great....I picked my Milltek because I wanted to keep it toned down and gain more power then my old Cargraphics,,,BUT I think I might reconsider now having his system, even though it is bit louder.......lol.......
Right up my alley then ...I drove in stealth mode because I did not need to be a poser with sound and no driving thrills
...I drove in stealth mode because I did not need to be a poser with sound and no driving thrills
Registered User
Joined: Jan 2004
Posts: 5,707
From: SW FL
Rep Power: 390
I have 3" Speedtech as well. Go cat-less.
Registered User
Joined: Apr 2008
Posts: 2,101
From: Huntington NY & boca raton florida
Rep Power: 106
Has anyone here heard the switzer exhaust compared to markski's? just wondering how they differ in sound..which is louder and if one is more exotic sounding then the other.. thanks in advance