Stock exhaust vs. Turbo back - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 02-20-2011, 04:31 PM Thread Starter
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Stock exhaust vs. Turbo back

What is the difference in sound from a stock exhaust with muffler delete and cat delete vs a 4" straight turbo back?

I also notice a small canister on the down pipe of the stock exhaust. What is it?

Truck is 2003 by the way.
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post #2 of 12 Old 02-20-2011, 07:35 PM
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I know from my experience with my truck. I just deleted my cat and muffler last Friday. Listening to some of the rigs around here with the common MBRP turbo back kits, I like mine better. Straight pipe is awesome. Definitely louder and alot more rappy sounding imo.



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post #3 of 12 Old 02-21-2011, 11:18 AM
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Sound for sure. That is the largest factor.

I chose the cat delete and muffler delete pipes because of the low end is still there, that's where the mpg is. The ease of putting the cat back on. And the price. For $120 and a huge drop in egt's. More that worth the price. When I upgrade my trubo I will get a 4" or 5" cat back system so I can still put on my cat when I take it to smog.
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post #4 of 12 Old 02-21-2011, 06:05 PM
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Smokersteve with the cat delete and muffler delete is the exhaust loud inside your truck? I have a 05 4 dr long bed that has studs and egr delete, I am ready to get a tuner and I know I should do something with my stock exhaust but I DON'T want to here the exhaust inside the truck. I haul a large TC and tow a 4,000 lb boat, we spend alot of time in the truck on trips and don't need anymore noise (the wind noise is enough). If I were to do one or the other (Cat or Muffler delete) which would lower EGTs the most and which is louder? Thanks
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post #5 of 12 Old 02-21-2011, 06:11 PM
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Quote:
Originally Posted by webefine View Post
Smokersteve with the cat delete and muffler delete is the exhaust loud inside your truck? I have a 05 4 dr long bed that has studs and egr delete, I am ready to get a tuner and I know I should do something with my stock exhaust but I DON'T want to here the exhaust inside the truck. I haul a large TC and tow a 4,000 lb boat, we spend alot of time in the truck on trips and don't need anymore noise (the wind noise is enough). If I were to do one or the other (Cat or Muffler delete) which would lower EGTs the most and which is louder? Thanks
Choosing between the 2. Muffler delete will drop more egt's than the cat, and will make it louder over the cat delete pipe. Only deleting the cat will have little benefit with the muffler on, same with sound.

I modified the direction of the exhaust exit to point at a 45* towards the rear of the truck. This helps with sound in the cab. Before I did this I had both deleted and the sound was only loud if I went past 3/4 throttle. Loud to me may be different to you.

Start with the muffler then go from there. And if you like the idea of re-directing the exhaust exit, do that for sound.

I chose cat and muff delete pipes for the same "sound" reason. + I wanted to keep low end and the price of the pipes.

Last edited by smokersteve; 02-21-2011 at 06:27 PM.
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post #6 of 12 Old 02-21-2011, 06:13 PM
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Here are a few pictures I have of my truck that show the exhasut and the exhaust exit direction.









Last edited by smokersteve; 02-21-2011 at 06:38 PM.
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post #7 of 12 Old 02-22-2011, 03:37 AM Thread Starter
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Well, I already have my muffler and cat off. I am basicall running a straight pipe right now. I like the way the truck sounds. I was wondering if there was any benefit to go to a 4" turbo back. I would like a louder turbo whistle.

What is the small canister at the bottom of the stock down tube? I have been told its there to redduce turbo whistle.
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post #8 of 12 Old 02-22-2011, 05:23 PM
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Now I am curious about the canister you are talking about. lol I have an 05. Not sure if they are on the 05's or not.
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post #9 of 12 Old 02-22-2011, 08:02 PM
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That resonator is only on the 03 trucks.

1991 Ranger - 38" TSL's, 3 link, One tons, 5.38s on King air shocks....under construction.
1997 Ranger - reg cab flare side, 3.0L, M5OD-R1, 4x4, 31x10.50r15 MT's.
2008 F350 - Crewcab short bed, 6.4L diesel, H&S XRT Pro, AFE DOC/DPF delete
1972 Mustang Coupe - 302, c4, 9", 4.11's locked.
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post #10 of 12 Old 02-23-2011, 02:20 AM
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im running stock downpipe to a diamond racing cat delete with a slash cut right off of that. true street sweeper sounds great and the soot build up underneath isnt that bad the slash cut redirects it pretty good.
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