leaving DOC on...greener right ? - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 03-03-2011, 02:18 AM Thread Starter
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leaving DOC on...greener right ?

does the DOC hamper a tuner in any way if it is left intact on the exhaust system...i know they do plug up eventually,but if left on and and it is not gunked up,wouldnt it be the greener thing to do? not exactly a tree hugger, but if it cuts NOX emmissions why not?...it is what i'd like to do.i will be ordering the delete stuff pretty soon and if the consensus is go DOC/DPF then thats what i will do.

2008 6.4 job3 F250 3:55 gears 10K gvw silver stretchcab 8ft box.timbrens and goosenek hitch.51 gal aux tank.
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post #2 of 11 Old 03-03-2011, 02:56 AM
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If you're deleting the DPF not much sense in worring about being green on the DOC. It is alot easier to swap back to stock if you delete both.

08 F250 CC, 4x4, Blue/Pueblo Gold, 3.73, S & B CAI, 5" Magnaflo downpipe back, Spartan TCM 275 & 310 KEM 345 (SCT - Sold) Mickey Thompson 35 12.5 20's

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post #3 of 11 Old 03-03-2011, 04:34 AM Thread Starter
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ok,but isnt the function for a dpf to capture and burn off soot [which falls to the ground anyway]....i crawled under my truck yesterday and it seems to me just removing the dpf would be alot easier....that youtube video floating around sure makes it look pretty easy and alot less stuff to undo if you leave the cat...BUT if the cat is in anyway restrictive then its gotta go.

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post #4 of 11 Old 03-03-2011, 07:41 AM
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It is not easier, its much harder actually. Removing the DPF/Cat is two bolts on the front and a slip joint at the back. Did you not count the bolts on the flange between the DPF/Cat?



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post #5 of 11 Old 03-03-2011, 08:43 AM Thread Starter
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yep....saw the bolts...not a problem with air....i went back and wanted to take some pics and saw the thing attached on the DOC pipe about midway..i thought that would have to be unbolted but i see now that it is just a black cannister bolted to the pipe for no apparent reason...dont see any wires attached to it [so what the hell is it anyway?]....guess it just comes out along with the whole pipe...so do you leave the rubber hangers on the truck or take em off with the pipe..the doc/dpf delete pipe doesnt seem to have any hanger attachments.

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post #6 of 11 Old 03-03-2011, 08:55 AM
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If you only delete the DPF, you are only getting rid of half the problem. Plus, the DPF/DOC are the furthest thing there is from keeping our trucks "green" IMO

Traded.. 03 6.0 PSD For.. Black F250 2008 SD LARIAT 6.4 PSD 4x4, Aries Bull Bar, Westin chrome running bars, Dura Liner, B&W Gooseneck hitch, Recon smoked taillights, Icon 4.5" lift, 35" Toyo M/T, etc... Running Spartan Tunes AFE PG 7, Flo Pro 4" DP Back, thanks to Cobb's Diesel. It has been great so far.




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So all that work and you're keeping the trash can of doom on the exhaust?

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post #7 of 11 Old 03-03-2011, 09:12 AM
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yep....saw the bolts...not a problem with air....i went back and wanted to take some pics and saw the thing attached on the DOC pipe about midway..i thought that would have to be unbolted but i see now that it is just a black cannister bolted to the pipe for no apparent reason...dont see any wires attached to it [so what the hell is it anyway?]....guess it just comes out along with the whole pipe...so do you leave the rubber hangers on the truck or take em off with the pipe..the doc/dpf delete pipe doesnt seem to have any hanger attachments.
without that can the whole monstrosity oe exhaust would be shaking like a leaf on a tree. Remove the 2 bolts at the downpipe flange first , then disconnect the wiring Hang the connections in bags if you like , then undo the pipes from their hangers, then pull the endpipe out of the exhaust and look out below its comming down
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post #8 of 11 Old 03-03-2011, 09:17 AM
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Cool He's right...

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Originally Posted by drservo View Post
If you're deleting the DPF not much sense in worring about being green on the DOC. It is a lot easier to swap back to stock if you delete both.
Ditto! I've "Returned mine to Stock" twice now for State RMV inspections. It is much quicker to drop the entire assembly as one piece than to disconnect the DPF from the DOC. Along with the number of bolts, the gasket usually gets destroyed so you have to scrape off the old one etc. Just an opinion!

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post #9 of 11 Old 03-03-2011, 09:31 AM
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Hell, not much sense in saying Green and Truck in the same breath.

Shaun

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post #10 of 11 Old 03-03-2011, 09:43 AM
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I left my cat in place. Wasn't hard, did it by myself in about 3 hrs

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