Modular V10 (6.8l)  

Muffler change... backpressure needed?

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Old 01-19-2012, 02:54 AM
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Muffler change... backpressure needed?

Currently have a V10 with no cat and a Flowmaster 44. Flowmaster has rusted out around the outlet tube and needs replaced. Don't like the sound of it on the V10 anyways....

Wanting to do a glasspack but I am worried it wont have enough back pressure. Ive heard the V10 straight piped and it just didnt sound quite right (could be 10 cylinders open just sounding different to me) but anyways will a glasspack let the engine function normally on a 2000 V10?

If not I will just end up getting the Flowmaster 50 HD
 
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Old 01-19-2012, 08:22 AM
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The v10 needs more back pressure than just a glasspack with no cats can supply... it will run it will just loose performance.. i have a set of magnaflow highflow cats.. $100 for both from summit. And a SLP loudmouth resonator. $77. Love the sound of mine and awesome performance
 
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Old 01-19-2012, 10:13 AM
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Not the backpressure myth again. You changed the exhaust velocity by ditching the cat, same with going to the undersized FM44.(Probably have that crappy collapsed exhaust shop bends too) I'd put a Flowmaster 70 BB2 or a FM50 SUV muffler on it and call it good. Just get a muffler with a decent amount of capacity to it. Loud and annoying exhausts don't always equate to more power, it is often times the opposite.
 
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Old 01-20-2012, 04:07 AM
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Originally Posted by dkf
Not the backpressure myth again. You changed the exhaust velocity by ditching the cat, same with going to the undersized FM44.(Probably have that crappy collapsed exhaust shop bends too) I'd put a Flowmaster 70 BB2 or a FM50 SUV muffler on it and call it good. Just get a muffler with a decent amount of capacity to it. Loud and annoying exhausts don't always equate to more power, it is often times the opposite.
I bought the truck with how the exhaust sits..... but the bends look fine


I just run glasspacks on all the V8s ive ever owned (whats wrong with me??!!) but it just didnt seem right on the V10.


Looking at 50 series but what do you guys think about the Flowmaster Pro Series (aka Hushpower pro?)
 
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Old 01-20-2012, 05:08 PM
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On my 2006 F250 I ran straight pipes with no cat or muffler for 3 yrs with no problems, no noticeable loss (or gain) in power from it either. Sure it may have had one, but it certainly was not dramatic enough for me to notice.

I hear all these backpressure stories all the time, usually just ignore them.
 
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Old 01-26-2012, 04:01 AM
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I have previously run a Flowmaster super 44. After it recently rotted off, I replaced it with a MBRP full 5 inch, with duals (5 inch) specifically made for the v10. Anybody who tries to tell ya back pressure this, and back pressure that, ignore it. My throttle response is better. My towing power is better. And so is my mileage. No, I don't have a dyno sheet. Don't need one. Oh yea, the v10 sounds great with duals, the bigger the better. No it's not loud, in my opinion.
 
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Old 01-26-2012, 11:29 AM
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Originally Posted by joeybuilt
I have previously run a Flowmaster super 44. After it recently rotted off, I replaced it with a MBRP full 5 inch, with duals (5 inch) specifically made for the v10. Anybody who tries to tell ya back pressure this, and back pressure that, ignore it. My throttle response is better. My towing power is better. And so is my mileage. No, I don't have a dyno sheet. Don't need one. Oh yea, the v10 sounds great with duals, the bigger the better. No it's not loud, in my opinion.

Vidoe and pics!!!!!
 
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Old 01-26-2012, 12:24 PM
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Originally Posted by joeybuilt
I have previously run a Flowmaster super 44. After it recently rotted off, I replaced it with a MBRP full 5 inch, with duals (5 inch) specifically made for the v10. Anybody who tries to tell ya back pressure this, and back pressure that, ignore it. My throttle response is better. My towing power is better. And so is my mileage. No, I don't have a dyno sheet. Don't need one. Oh yea, the v10 sounds great with duals, the bigger the better. No it's not loud, in my opinion.
If you actually saw a before and after dyno sheet you would probably change your mind. Sounds to me like a typical case of "more power because its louder". Do you really think an exhaust designed for a PSD making 500+hp and 1000+ tq is going to optimal for a NA gas engine making a fraction of those numbers?
 
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Old 03-11-2014, 02:31 PM
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