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+--- Thread: exhaust size (/showthread.php?tid=5007)
exhaust size - Palmer - 10-10-2013
What sort of power can u get from a 2.5''?
I plan to increase power later in the cars life ( turbo, pump etc), but dont know what sort of restrictions a 2.5'' will give.
Chris
RE: exhaust size - Palmer - 10-10-2013
Basically im asking is a 2.5'' turbo back restrictive when you start playing with bigger turbos??
Chris
RE: exhaust size - Mark_M - 10-10-2013
guess it depends on how big the turbo. I dont really know but I would say for much over 200BHP a bigger exhaust would be needed. Exactly what your max would be on 2.5" though I will have to leave to others.
It isnt really the ultimate power either as a larger exhaust will let the turbo spool quicker as well
RE: exhaust size - Palmer - 10-10-2013
I dont really know to be honest thats for the future to decide i just wanna get the 2.5'' then it cant take the beans later on down the line. At what point do you need tobe looking at a 3'' power wise? Or is it turbo dependant
RE: exhaust size - Duncansport - 10-10-2013
(10-10-2013, 02:08 PM)Palmer I dont really know to be honest thats for the future to decide i just wanna get the 2.5'' then it cant take the beans later on down the line. At what point do you need tobe looking at a 3'' power wise? Or is it turbo dependant
2.5 will support 400hp worth of air flow with little to no performance issues according Corky Bell. 3 inch is best bet for a diesel however due to the increase exhaust volume and density.
RE: exhaust size - Palmer - 10-23-2013
Getting a 2.75'' in with twin exits one either side of the bumper
Getting a 2.75'' with twin exits one either side of bumper.
RE: exhaust size - lgreeley83 - 10-23-2013
Just go and get 3" and dump it behind the passenger front tire :-)....no but really, why not just throw the 3" on so you don't have to worry about restriction being a factor?
I'm sure someone will disagree about high rpm back pressure.... I default to 3" but that's just me. Cost isn't that different.
RE: exhaust size - Simpler=Better - 10-23-2013
3" is easy to find performance stuff for, 2.5" is easy to find in stores.
Technically 2.5" should be fine.
RE: exhaust size - Palmer - 10-24-2013
Im looking at a lot of money for a 3''.
The guy was explaining to me that if you bend a 3'' (mandrel or some crap) it reduces the size at it stretches. Also he wasn't prepared to do a 3'' as it may need to be bodged with the equipment he has. A 3'' system is about £300 more as well.
I think 2.75'' will be fine. I have a 3'' exit that bodged on due to a broken hangar and its mahusive.
RE: exhaust size - Palmer - 10-31-2013
http://www.youtube.com/watch?v=7IaH3ECoWks&feature=youtu.be
Went for the 3'' ^^
RE: exhaust size - MFSuper90 - 10-31-2013
Sounds pretty sweet man!
RE: exhaust size - Palmer - 10-31-2013
Im impressed! Just needs moar powah! Haha
RE: exhaust size - maxypriest - 10-31-2013
(10-31-2013, 12:52 PM)Palmer Im impressed! Just needs moar powah! Haha
That sounds great, how many silencers?
RE: exhaust size - willbhere4u - 10-31-2013
sounds very good!
RE: exhaust size - Palmer - 10-31-2013
No silencers at all or a cat
straight pipe baby!
RE: exhaust size - Simpler=Better - 10-31-2013
(10-31-2013, 06:27 PM)Palmer No silencers at all or a cat
If the law man comes a knockin', remind them that a turbocharger is technically a muffler.
RE: exhaust size - bricktron - 10-31-2013
it seems to me that if diameter would be getting reduced at the bends then he would NOT be using a mandrel. isn't consistent cross sectional area the whole point?
RE: exhaust size - maxypriest - 11-01-2013
(10-31-2013, 06:27 PM)Palmer No silencers at all or a catBrilliant.
How did you get on with the funny u bend part that goes around the steering column?
And that two part exhaust clamp.... You know the one!
RE: exhaust size - Palmer - 11-01-2013
I used MIJ in walsall. Excellent job going round the column ill post a pic of it later!
RE: exhaust size - maxypriest - 11-01-2013
were they good? How much?
Later in 2014 i will need someone to fabricate a 3.5" system for my W124.
RE: exhaust size - Palmer - 11-01-2013
They have some bad reviews on the net but then again so will anyone. Proper job though, well it should be for 720! :O
RE: exhaust size - carlitosgy6 - 11-01-2013
im running 3 inches right from the turbo,no muffler exiting right in front of the rear tire,quicker spool and a beautiful turbo whine from the exhaust
RE: exhaust size - Simpler=Better - 11-01-2013
(11-01-2013, 10:09 AM)Palmer They have some bad reviews on the net but then again so will anyone. Proper job though, well it should be for 720! :O
It sounds like a lot of money, but we blew $275 putting a 2.5" exhaust on my truck using the cheapest generic parts on it and did all the welding/cutting ourselves. Fitment took forever (because I'm a perfectionist)
So 720 for a professional shop to do it isn't really that bad, especially in the UK
RE: exhaust size - Palmer - 11-01-2013
Dont forget thats £720 not $!