turbo back flo pro system with or without muffler - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 04-04-2014, 09:15 AM Thread Starter
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turbo back flo pro system with or without muffler

I am really enjoying how quiet this truck is so i want to know how much louder the truck is with a turbo back full exhaust with all the deletes in place...so do i need to go muffler or no muffler...?

how much louder either way?

DONE:
EGR delete--4" turbo back exhaust
75HP tune
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post #2 of 12 Old 04-04-2014, 09:19 AM
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there isnt a whole lot of difference. the 6.4s are naturally quiet (to me) unless you have the single setup of course. no muffler is a little louder at wot. no huge difference at idle

06 f350 Lariat metallic gray and black
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08 F250 Lariat Oxford white
4 inch straight pipe
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Rudys Fuel Bowl Delete
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post #3 of 12 Old 04-04-2014, 09:41 AM
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yeah at idle it's not much different. at wide open it's pretty damn audible.
someone posted a video somewhere of the 5" w/out muffler
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post #4 of 12 Old 04-04-2014, 09:58 AM
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I deleted the cat/dpf and running the little stock muffler I still can't hear the exhaust with the windows up. If I roll down the passenger side I can hear a little turbo whistle but thats it.
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post #5 of 12 Old 04-04-2014, 10:21 AM
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I don't think straight pipes they are as loud as my 6.0 was. The down pipe on truck bad are you just wanting to replace all the way thru on exhaust? My kit was down pipe thru kit.

2008 F250 XLT SBCC grey flake, 33x12.50 Toyo m/t's on 18 inch mammoth wheels. Rhino lined go rhino nerf bars. S&B cai,Spartan tuned and straight piped. Fake *** chrome grille removed and a matching colored grille put in place.
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post #6 of 12 Old 04-04-2014, 12:25 PM Thread Starter
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I am looking at from the turbo too the back....single exhaust

DONE:
EGR delete--4" turbo back exhaust
75HP tune
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post #7 of 12 Old 04-04-2014, 12:56 PM
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it wasnt very loud when i drove a few miles with just the downpipe. i have a 5 inch turbo back with muffler flo pro and its pretty quiet. there was more engine rumble when a cai was installed.

08 F250 KR
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post #8 of 12 Old 04-04-2014, 04:13 PM
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I have the 5" DP back no muffler flo pro honestly it's not loud at all in the cab I drive about 100 miles round trip for work every day and it sounds pretty much stock inside the cab but if you roll your windows down you can hear your turbo a whole lot more than stock. Volume didn't change much. Unless you're outside the truck.

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post #9 of 12 Old 04-04-2014, 07:09 PM
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I have the flo-pro turbo back straight pipe dual kit on mine. It is way too quiet for me. I miss my 6.0 sound. But it is nice to be WFO and have a normal voice conversation.



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post #10 of 12 Old 04-06-2014, 06:59 PM
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Quote:
Originally Posted by toren302 View Post
I have the flo-pro turbo back straight pipe dual kit on mine. It is way too quiet for me. I miss my 6.0 sound. But it is nice to be WFO and have a normal voice conversation.
i miss my 6.0 also. but when im WFO i dont want no conversation going on. i want the truck screaming hahaha. the 6.4 is too quiet even with a 5" straight pipe lol

heres an in cab of my first run with the truck wide open windows up spinning all 4


and here is some outside sound of it running. my truck is at the very beginning of the video and at 1:48 is my fastest run so far. there are a few other 6.4's in there too you can hear


T-rav
2010 F350 6.4- H&S Single turbo kit, 5" flo pro,No limit SS cold side kit, No Limit intake, MPD billet CCV/oil filler, newton leveling kit, RED Newton traction bars, custom projector retrofit in oem lights and a bunch of LED lights LOL

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