4" or 5" straight pipe - Ford Powerstroke Diesel Forum

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post #1 of 20 Old 10-20-2007, 06:19 PM Thread Starter
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Thumbs up 4" or 5" straight pipe

Hello fellow strokers. I have an 07 super duty, completely stock. Im looking into getting a straight through pipe, no cat no muffler. But i do not know which one, 4 or 5 inch. I plan on doing some other mods as well, s&b intake and cfm+ intake elbow. Later on i would like to get an upgraded trubo and injecters. I have also been looking at a programmer.

Ok after hearing me out what size do you think would be right for me? Thanks guys!
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post #2 of 20 Old 10-20-2007, 06:21 PM
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4" turbo back will be good enough
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post #3 of 20 Old 10-20-2007, 06:29 PM Thread Starter
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You dont think i would need to worry about egts. If you dont have alot of mods done is it bad to have a 4 or 5 inch pipe? What do you think about straight pipin?
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post #4 of 20 Old 10-20-2007, 06:29 PM
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4" and make sure you get an sct xcal2/3. safest and best power.

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #5 of 20 Old 10-20-2007, 06:32 PM
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Quote:
Originally Posted by shaggy337 View Post
You dont think i would need to worry about egts. If you dont have alot of mods done is it bad to have a 4 or 5 inch pipe? What do you think about straight pipin?
worry about egt's? Bigger exhaust will lower them, especially turbo back. It is NEVER bad to have a 4" turbo back exhaust and I highly suggest losing the muffler and cat cuz you'll love the way it sounds.

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #6 of 20 Old 10-20-2007, 06:32 PM
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yes you need to worry about EGT's -- but thats why you get an EGT guage (along with boost, and trans temp)

the diff in EGT btwn a 4" or 5" won't be that great a difference...

and LOTS of people love the straight pipe sound!
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post #7 of 20 Old 10-20-2007, 06:35 PM Thread Starter
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Thanks for the input bro, your truck is bad. That hoss is a nice lookin wheel. I want to get the chrome ones on mine.
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post #8 of 20 Old 10-20-2007, 06:41 PM Thread Starter
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Ok so 4" sounds like the way to go. How much power would you have to be pushing to actually need a 5".
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post #9 of 20 Old 10-20-2007, 07:02 PM
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Originally Posted by shaggy337 View Post
Ok so 4" sounds like the way to go. How much power would you have to be pushing to actually need a 5".
more than you can afford. lol No, im not sure....a lot though!

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #10 of 20 Old 10-20-2007, 07:09 PM
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Get that thing 4" straight piped from turbo if ya can. Then buy ya some good gauges before you add a tuner!! Post Up And Let Us In On Yer Mods

Lloyd Vice Director of Virginia Strokers
2006 F350 6.0L SuperDuty Lariat 4x4
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