Muffler Delete - Ford Powerstroke Diesel Forum
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post #1 of 24 Old 04-03-2010, 06:02 PM Thread Starter
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Muffler Delete

Are there any performance gains to doing the muffler delete or is it strictly for changing the sound? I don't have a cat on my excursion and am debating taking out the muffler if it has any performance gains. I don't really want it load - I have the other truck for that. Thanks guys-


1997 F250 XLT 7.3 ENGINE

Extra Cab Longbed
285/75/16 BFG Tires
Standard Transmission
Heavy Duty Clutch
ATS Turbo, Intercooler
4" Straight Exhaust
K&N Air Filter
Superchips Programmer on Tow safe
Pillar Gauge Pod with AutoMeter Boost, Exhaust Temp
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post #2 of 24 Old 04-03-2010, 06:07 PM
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Im pretty sure it doesnt have much performance gain at all. may be less restrictive and lower your egt's... maybe somebody else will chime in..
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post #3 of 24 Old 04-03-2010, 06:32 PM
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yeah it will lower egts like lpoutfiters said

03 F-350 Lariat 7.3 TW Chip, Diamond Eye 4", DIY Intake, CFM Plus, zoodad, unhooked waste gate, D.I. x-over, Auto Meter Ultra Lites, Dash Pod
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post #4 of 24 Old 04-04-2010, 07:02 PM
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Its louder under acceleration, but while cruising my truck is quieter without the muffler. I think there might be a small performance and mpg gain.


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post #5 of 24 Old 04-05-2010, 05:12 AM
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I've got an 01 F250 w/auto that I use to pull the GF 26' 5er. I have the DIY intake and the Walker BTM on the stock pipes. Before the muffler alone it would take me at least 2 miles to get the 5er up to 70 on the turnpike, but after the muffler it takes me only 3/4 mile to get up to speed. I don't have gages but the truck doesn't seem to struggle like it used to.
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post #6 of 24 Old 04-05-2010, 07:41 AM
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Getting rid of that restrictive stock muffler will definately help things. Either a striaght delete or if you don't want it quite so loud, a Walker BTM will be quiter, and will still flow much better than the stock setup. I had my straight piped, but I work late and coming up the hill to my house seemed a little loud. (I like my neighbors). I put on the BTM and I kinda get the best of both worlds. As far a mileage, I didn't see any difference, but the exhaust temp is cooler.

2002 F350 supercab 4X4, 7.3 PSD, auto
PHP Tuned /05 Grille /6637 intake /Zoodad /Gauges/ High Idle mod /Fog Light mod /LED Mirror lights/ Foil Delete /Walker BTM /SS HPX /285/75/16E BFG A/T /Coolant Filter /tinted tails and cab lights /5% Tint. SOLD

2001 F350 Reg Cab Dually, 7.3 PSD, auto
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post #7 of 24 Old 04-05-2010, 03:08 PM
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All my noise is from my single shot injectors. I ran a straight pipe for years. The EGT's were down from stock and you could hear the turbo whistle a bit more. It does not matter what you do a 7.3 is gonna be a bit noisy. Might as well have less EGT's

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post #8 of 24 Old 04-05-2010, 06:22 PM Thread Starter
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Thanks for the replies - what is this Walker BTM you mention?


1997 F250 XLT 7.3 ENGINE

Extra Cab Longbed
285/75/16 BFG Tires
Standard Transmission
Heavy Duty Clutch
ATS Turbo, Intercooler
4" Straight Exhaust
K&N Air Filter
Superchips Programmer on Tow safe
Pillar Gauge Pod with AutoMeter Boost, Exhaust Temp
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post #9 of 24 Old 04-05-2010, 06:34 PM
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I just cut off my muffler, and I did not find it that nosiey. Yes it can be when you romp on it, but if you keep the foot off the skinny, it will not bother others as much as you might think. Just use some common sense when you kit the skinny, and you will be fine. So far, I have notices a slight increase in MPG's so far, and I can hear the turbo better. I still need to run a full tank threw it before I say a increase of MPG's, but the lie-o-meter has moved up .2 MPG's and I have drove a little harder than I normal do. Same fuel, nothing new, just cut the muffler off, nothing else yet.

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post #10 of 24 Old 04-05-2010, 07:31 PM
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The Walker Big Truck Muffler is a straight thru design muffler. I got mine at NAPA for about $50. Easy to install. There are a couple of write ups on here on how to install. For the money, I'm happy.

2002 F350 supercab 4X4, 7.3 PSD, auto
PHP Tuned /05 Grille /6637 intake /Zoodad /Gauges/ High Idle mod /Fog Light mod /LED Mirror lights/ Foil Delete /Walker BTM /SS HPX /285/75/16E BFG A/T /Coolant Filter /tinted tails and cab lights /5% Tint. SOLD

2001 F350 Reg Cab Dually, 7.3 PSD, auto
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