Pipes
Thread Starter
Burning Brakes
Joined: Feb 2008
Posts: 949
Likes: 1
From: Tampa fl
St. Jude Donor '14
Pipes
Just changed my clutch out and ready to start my TT rear build. I am getting ready to purchase piping and wanted to get some opinions. I am running 3" from exhaust man back and have been looking into pros and cons of different materials. Now take into account.... I plan on coating and wrapping the exhaust so I am not concerned about how shinny my steel is. I know I should look for seamless pipe but what are pros and cons for 304, 409, or aluminized pipe or will it not make much difference since I am wrapping and coating? For the charge pipe I will prob do aluminum and wrap the aluminum. so far all I have heard is to get 304 because its stronger and last longer. I have 0% road salt and will be coated. so is there really a NEED for 304?
Burning Brakes
Joined: May 2011
Posts: 1,216
Likes: 56
From: Houston Texas
Consider the application I guess would be my response. The application is intended to put and maintain (particularly for rear mount) an increased thermal load in the exhaust pipe. 304 will tolerate greater stresses under thermal load. Since you are going to be coating and wrapping the piping, that will further increase the thermal load. Certainly coating and wrapping will reduce/eliminate corrosion from the outside, but the inside will still be subject. H2O is a by-product of combustion, so there will be water sitting in the piping. In my opinion if you are going through the trouble of a turbo build and want the piping to last, then spend a little extra on 304 and be done. The aluminized will start corroding on the welds immediately, and 409 is POS stainless that corrodes early. 304 will corrode eventually, but probably not in the time you or the next owner have the kit. 321 would be even better, but obviously you've got to drop some coin for it.
Good luck on the turbo build!!
Good luck on the turbo build!!
Thread Starter
Burning Brakes
Joined: Feb 2008
Posts: 949
Likes: 1
From: Tampa fl
St. Jude Donor '14
Consider the application I guess would be my response. The application is intended to put and maintain (particularly for rear mount) an increased thermal load in the exhaust pipe. 304 will tolerate greater stresses under thermal load. Since you are going to be coating and wrapping the piping, that will further increase the thermal load. Certainly coating and wrapping will reduce/eliminate corrosion from the outside, but the inside will still be subject. H2O is a by-product of combustion, so there will be water sitting in the piping. In my opinion if you are going through the trouble of a turbo build and want the piping to last, then spend a little extra on 304 and be done. The aluminized will start corroding on the welds immediately, and 409 is POS stainless that corrodes early. 304 will corrode eventually, but probably not in the time you or the next owner have the kit. 321 would be even better, but obviously you've got to drop some coin for it.
Good luck on the turbo build!!
Good luck on the turbo build!!
Instructor
Joined: Feb 2006
Posts: 222
Likes: 0
I think you're focused too much on the wrong aspect of this build.
No one here seems to have issues with rotting pipes and/or keeping their setups/cars long enough.
I'd be more worried about running the right size/geometry of feed pipes (hot and cold) for the application.
Have fun with the project, keep us posted!
No one here seems to have issues with rotting pipes and/or keeping their setups/cars long enough.
I'd be more worried about running the right size/geometry of feed pipes (hot and cold) for the application.
Have fun with the project, keep us posted!
Thread Starter
Burning Brakes
Joined: Feb 2008
Posts: 949
Likes: 1
From: Tampa fl
St. Jude Donor '14
I think you're focused too much on the wrong aspect of this build.
No one here seems to have issues with rotting pipes and/or keeping their setups/cars long enough.
I'd be more worried about running the right size/geometry of feed pipes (hot and cold) for the application.
Have fun with the project, keep us posted!
No one here seems to have issues with rotting pipes and/or keeping their setups/cars long enough.
I'd be more worried about running the right size/geometry of feed pipes (hot and cold) for the application.
Have fun with the project, keep us posted!
Thread Starter
Burning Brakes
Joined: Feb 2008
Posts: 949
Likes: 1
From: Tampa fl
St. Jude Donor '14
I wanted to revive this and see if anyone had any incite on the pipe sizing paradox.... does anyone have any good info or calculation that would help with the sizing? I know it may not be as simple as x+y=pipe size but would appreciate some science in relation to this. what I am looking at now is 2" pipe gives me plenty of velocity in the pipe over a long distance, but will this create other problems or back pressure issues?
Instructor
Joined: Feb 2006
Posts: 222
Likes: 0
http://www.yellowbullet.com/forum/sh...arging&page=35
Visit this thread and have a read on post #511
Keep up the research and please report back.
Visit this thread and have a read on post #511
Keep up the research and please report back.
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Thread Starter
Burning Brakes
Joined: Feb 2008
Posts: 949
Likes: 1
From: Tampa fl
St. Jude Donor '14
New development in the works.... I have an offer to trade my twins for a single. my two turbos would be too big so I am trading for a single tubonetics 76mm .96ar. I realize that is too large and will change the housing out for a .81. So given this I already ran pipe for a single setup. 2.5 from manifold then y pipe all the way to the turbo 2.5. the charge pipe is 2.25 from turbo to intercooler. I need to know if the 2.25 charge pipe is too small for this turbo. If it is too small what can i expect if i use it?
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
New development in the works.... I have an offer to trade my twins for a single. my two turbos would be too big so I am trading for a single tubonetics 76mm .96ar. I realize that is too large and will change the housing out for a .81. So given this I already ran pipe for a single setup. 2.5 from manifold then y pipe all the way to the turbo 2.5. the charge pipe is 2.25 from turbo to intercooler. I need to know if the 2.25 charge pipe is too small for this turbo. If it is too small what can i expect if i use it?