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navajochief
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Vehicle: 2005 Ford F-350 SRW 4x4
Joined: Jun 2007
Member # 2924
From: Brawley CA
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ArTi54N
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Vehicle: 2001 F150 4x4 Supercab
Joined: Jun 2005
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From: Austin Texas
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 Posted
- May 14 : 11:40p
| I cant think of why a single 4" would ever be louder then a dual 4"
especially in a true dual setup, but either way still
but I would stay between 3-4" exhaust tubing.. anything wider is overkill, and might make the performance suffer..
you definetly have the power to make a dual setup worth it.. of course you should have a decent intake too..
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Edited by - ArTi54N on May 14 11:41p |
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navajochief
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Vehicle: 2005 Ford F-350 SRW 4x4
Joined: Jun 2007
Member # 2924
From: Brawley CA
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Posted
- May 15 : 1:25p
| | Would a 4" dual exhaust system lower EGT sooner than a 4" single exhaust because of the extra tubing? Or would it be the same? I'm assuming the dual would be louder only because of the extra tubing and possibly smoother flow. Any thoughts? | |
DrSpeed
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Vehicle: Ford F-550, Gixxer 750,
Joined: Jun 2005
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From: Bellingham WA
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Posted
- May 15 : 2:06p
| Truth be told, whatever diesel your running it on, a single 4" would flow PLENTY.
The duals exhausts on the diesels are strictly for looks.
The only way to get "true" duals is to have two turbos in a VEE configuration, and each turbo is supplied from the one bank.
Otherwise, no such thing as a true dual, as all the ehaust is plumbed through the turbo!
So....the answer...it's how you want it to look. No difference in peformance. | |
Thermo
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Vehicle: 97 Ford Expedition lifted
Joined: Sep 2006
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From: Norfolk VA
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Posted
- May 15 : 4:12p
| navajochief, running dual 4" piping out the back of your truck will not have any effect on the EGTs. The exhaust gases are still leaving the engine at the same rate. If you do see a change, it is going to be very slight as a portion of your piping is still going to be a single pipe (atleast from where the two exhaust headers join till after the turbo). This area is where the EGTs are going to be most affected. But, also keep in mind, by going with a larger pipe, you are going to be reducing the speed of the exhaust gases, which will negatively affect the operation of the turbo (think of it like blowing gently on a fan using your mouth or using compressed air in a fine stream). The faster exhaust gas velocity will result in quicker spooling of the turbo.
After the turbo, if you go dual exhaust, the drop in backpressure will there, but it is going to be fairly insignificant as the single 4" piping doesn't offer a lot of backpressure unless you have some significant bends in the piping. Running duals will slow the exhaust leaving, giving it more time to dissipate heat under the truck, but that is fairly insignificant at that point.
Chris "Thermo" Coleman and Nukie, the radioactive 97 X | |
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Single 4" exhaust vs 4" dual exhaust
