Help with exhaust!!! - Ford Powerstroke Diesel Forum
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Old 03-11-2008, 07:17 AM
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Help with exhaust!!!

Hey everyone,

Job Bonus time is coming and it's time to upgrade a few things. I am wondering about exhaust. Right now I have it straight piped (the stock exhaust) to a 4" elbow and a 5" tip exiting in front of the rear wheel. I LOVE the sound of the truck and can only imagine what a 4" turbo back will be like. My problem is the "klackety flack tractor sound" I have. Will a 4" turbo back make the "klack" even worse?

I'd love to have my truck LOUD but without the klack. I know our trucks make the sound but is there a way to improve it while still having it loud (straight piped)?? What about a high flow muffler?

And also, Is there a huge difference in the sound of the exhaust exiting "behind" the rear wheel versus in front of it?

What's your take on all of this?

Thanks guys...

(Also coming...18" rims...35" toyos...Upgraded headlights...Line X the bed...Wicked Wheel...)
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Old 03-11-2008, 07:31 AM
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There are some items that will help with the engine noise. I installed a high pressure crossover hose and did the in tank and pre-pump mods. Will be doing the regulated return soon. 4" turbo-back will increase the noise out the exhaust, but not the motor IMO.
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Old 03-11-2008, 08:07 AM
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Just got my 4" on and can't tell any difference in the sound of the motor.
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Old 03-11-2008, 09:54 AM
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That noise is the injectors. A 4" exhaust shouldn't have any effect on the amount of noise the injectors make.
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Old 03-11-2008, 11:12 AM
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Try running some 2 stroke oil in the fuel 1 oz. oil to 1 gallon fuel.
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Old 03-22-2008, 08:06 AM
SyN SyN is offline
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Just installed a 4'' MBRP Turbo Back on my 7.3L. From inside, I can't tell any difference.
The motor sounds the same. Now Outside the truck, it sounds close to stock...Go to the back of the truck, this is where U can tell the difference. Not Loud, but has a Mean sounding Groan and Turbo Whine-->{In a good Kewl Way}. Had the wife drive the truck a few times up and down the street, just at half throttle. I got Wood real fast!!

I didn't straight pipe the exhaust, I used the MBRP muffler. Since I plan on spending many hours in the truck with our newly aquired 32ft 5th wheel.

Also I was really impressed with the seat of the pants feel of the few extra hp, via the
4" DP and Exhaust gave. Money well Spent. Thanks Bob at The Diesel Site and MBRP.

I'm sure your klack your hearing is the injectors. A new exhaust can't cure that. Only biodiesel or another Fuel additive can quiet them a bit.

Last edited by SyN; 03-22-2008 at 08:22 AM.
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