exhaust??????????????

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exhaust??????????????

Postby justinduckman7 » Wed Nov 28, 2012 6:27 pm

I have 05 f350 with 6.0 diesel and was wondering if anyone has straight piped the stock exhaust ? cheap easy to do but does it help and how does it sound ? any help would be awesome.
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Re: exhaust??????????????

Postby Sfd714 » Wed Nov 28, 2012 7:01 pm

They sounds awsome. U can hear the turbo alot better. Check out powerstrokearmy.com

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Re: exhaust??????????????

Postby justinduckman7 » Wed Nov 28, 2012 7:30 pm

Cool thanks for the help. I figure I can straight pipe stock exhaust with a pretty 4 or 5 in tip for less than 85 bucks and 60 is the cost of the tip. My 03 f150 with 5.4 was straight piped with 3.1/2 in tip and it sounded as good as duels so I figured I'd try it on the new truck.
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Re: exhaust??????????????

Postby ajmorell » Thu Nov 29, 2012 7:22 am

Check YouTube, I bet there's some videos so you can get an idea of how it sounds.

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Re: exhaust??????????????

Postby whisperin' duck » Thu Nov 29, 2012 10:25 am

I did it on an 05 f-250, sounded real good :thumbsup:
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Re: exhaust??????????????

Postby justinduckman7 » Thu Nov 29, 2012 4:38 pm

Thanks for the help and I read up on it last night and its sound good and helps the truck breath so I'm thinking that's the route I'm gonna take .
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Re: exhaust??????????????

Postby 2500hdon37s » Fri Nov 30, 2012 9:34 am

justinduckman7 wrote:Cool thanks for the help. I figure I can straight pipe stock exhaust with a pretty 4 or 5 in tip for less than 85 bucks and 60 is the cost of the tip. My 03 f150 with 5.4 was straight piped with 3.1/2 in tip and it sounded as good as duels so I figured I'd try it on the new truck.

a diesel straight piped is a lot different than a gas motor...... gas motors sound terrible 95% of the time straight piped, where a diesel actually sounds good and isn't retarded and deafening loud on the highway. a gas motor actually needs some back pressure from the muffler so its not even good for a gas motor to be straight piped.

a stock pipe is super easy and cheap to straight pipe, honestly I wouldnt even put a tip on it... make it a sleeper truck if you have a programmer.
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Re: exhaust??????????????

Postby ajmorell » Fri Nov 30, 2012 10:01 am

2500hdon37s wrote:a gas motor actually needs some back pressure from the muffler so its not even good for a gas motor to be straight piped.


The motor itself doesn't need backpressure (an engine will run fine with open headers). Proper exhaust sizing (and subsequently backpressure) allows the exhaust to scavange properly and maintain a given temperature which improves exhaust flow and hence maximizes hp and torque.
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Re: exhaust??????????????

Postby Sfd714 » Sat Dec 01, 2012 10:36 am

The 6.0 turbo.needs back pressure due to the way there Turbo is.

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Re: Re: exhaust??????????????

Postby ajmorell » Sat Dec 01, 2012 11:44 am

Sfd714 wrote:The 6.0 turbo.needs back pressure due to the way there Turbo is.

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Care to elaborate?

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exhaust??????????????

Postby whisperin' duck » Sat Dec 01, 2012 2:24 pm

When they cut the muffler and crap out they'll put smaller diameter pipe in to create the back pressure you need.
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Re: exhaust??????????????

Postby justinduckman7 » Sat Dec 01, 2012 3:02 pm

So if my 6.0 needs back pressure then how come the 4" exhaust I can buy from the cat back isn't smaller where the muffler would be? I just planned on buying a 3 1/2 in piece of pipe with flares on it and putting it in place of muffler. Will this give it enough back pressure?? I know someone on here is a hardcore diesel guy
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Re: Re: exhaust??????????????

Postby ajmorell » Sat Dec 01, 2012 4:36 pm

whisperin' duck wrote:When they cut the muffler and crap out they'll put smaller diameter pipe in to create the back pressure you need.

Yeah that's not exactly the scientific explanation i was looking for

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Re: exhaust??????????????

Postby Sfd714 » Sat Dec 01, 2012 5:02 pm

The 6.0 turbo isn't a normal Turbo. The fins in it move kinda like a centrifugal clutch.

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Re: exhaust??????????????

Postby Sfd714 » Sat Dec 01, 2012 5:04 pm

I hocked my.muffled and resonator off and now have turbo issues.

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Re: exhaust??????????????

Postby Sfd714 » Sat Dec 01, 2012 6:42 pm

I have a thread on psa about this. Unsure how to post the link to it on here

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Re: Re: exhaust??????????????

Postby ajmorell » Sat Dec 01, 2012 7:58 pm

Sfd714 wrote:The 6.0 turbo isn't a normal Turbo. The fins in it move kinda like a centrifugal clutch.

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I know that, its a variable geometry turbo, most of the diesels on the market have them.

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Re: exhaust??????????????

Postby justinduckman7 » Sun Dec 02, 2012 7:38 am

So you guys say just buy the after market exhaust and it won't mess up turbo ?? I can pick a cat back 4" with 5" tip for 325. I guess that will be my Christmas present to myself besides the ss prop I just bought for the duck boat
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Re: exhaust??????????????

Postby ajmorell » Sun Dec 02, 2012 12:35 pm

justinduckman7 wrote:So you guys say just buy the after market exhaust and it won't mess up turbo ?? I can pick a cat back 4" with 5" tip for 325. I guess that will be my Christmas present to myself besides the ss prop I just bought for the duck boat


Call the manufacturer of whatever exhaust you are looking at and talk to them about it. They will be able to answer any questions you have.
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Re: exhaust??????????????

Postby Sfd714 » Sun Dec 02, 2012 5:55 pm

Not all 6.0 will act the same with the same Exhaust

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Re: exhaust??????????????

Postby whisperin' duck » Mon Dec 03, 2012 10:19 am

justinduckman7 wrote:So if my 6.0 needs back pressure then how come the 4" exhaust I can buy from the cat back isn't smaller where the muffler would be? I just planned on buying a 3 1/2 in piece of pipe with flares on it and putting it in place of muffler. Will this give it enough back pressure?? I know someone on here is a hardcore diesel guy


because it is a CAT BACK system with a muffler in it. A straight pipe has no cat, resonator, or muffler.
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Re: exhaust??????????????

Postby Sfd714 » Mon Dec 03, 2012 12:19 pm

The 6.0 has a resonator and muffled. Id just delete the muffler. The cat back system will do that.

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Re: exhaust??????????????

Postby justinduckman7 » Mon Dec 03, 2012 5:13 pm

I know catback full exhaust will delete that stuff but I didn't want to drop $350 on that if I could just get by with leavi g everything stock and just deleting the stock muffler and adding a straight pipe. Price of that verses the full system is $300 . I would rather spend 50 and have same sound and a little more performance . $300 buys the rest of my stuff for duck boat that I would like to finish cause wife gets a little pissed when I try to drop a bunch of money on all the toys. :yes:
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Re: exhaust??????????????

Postby NCSUhunter » Tue Dec 04, 2012 10:39 am

You can straight pipe a 6.0 by just replacing the muffler with a piece of stock diameter pipe and it will change some of the noise if that's what you're looking for. The resonator/cat (whatever you wanna call it) makes the most sound difference. Anybody that knows about diesels will tell you that a turbo actually gives a motor back pressure and acts as a muffler. Look at competition pulling trucks. It should not mess anything up to delete both of these items with stock pipe. Replacing with 3.5 is a cheaper route, the full 4 or 5 inch will just make more power and sound different because they will always flow better (mandrel bends, angles, etc). Its mostly personal choice.
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Re: exhaust??????????????

Postby Sfd714 » Tue Dec 04, 2012 12:10 pm

You cant compare pulling trucks to stock trucks. Its not about back pressure to the motor. Its more about back pressure to the 6.0 turbo.

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