cat delete?? - Ford Powerstroke Diesel Forum
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Old 03-28-2010, 05:50 PM
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cat delete??

i have a 4 inch cat back mbrp nothing special i work with the truck its not for show i dont have anything done to it thats it. i want it louder but not really loud. how much louder would it be to do a cat delete and could it mess anything up not woried about cops giving a ticket cuz here they dont care. what u think is it worth doing it. any more performance? alot louder? mess anything up?
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Old 03-28-2010, 05:58 PM
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It is actually better for your truck not to have the CAT...it is the most restrictive thing in your exhaust system. If you have the free flow MBRP muffler, with the cat deleted at will be plenty loud at WOT.
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Old 03-28-2010, 06:03 PM
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cat delete

It all depends on what year your truck is and its not going to be a whole lot louder just going to hear the turbo whistle more when it come to cats i always say someone lots smarter than me designed the truck to run with that in there for optimal fuel economy unless you have it chipped and piped with turbo upgrades its not even worth it to take it out in my opinion
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Old 03-28-2010, 06:07 PM
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i always say someone lots smarter than me designed the truck to run with that in there for optimal fuel economy
Not sure I understand this one???

Thought the Cat Converter was for emissions-only and nothing to do with optimal fuel economy and in fact it adversely impacts mpg???
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Old 03-28-2010, 06:09 PM
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the cat is the biggest restriction of the exhaust system, ditching it is the best thing you can do for your truck, you wont get a big sound increase, but you may see a slight EGT drop. If you want some prices on a delete pipe, I can help you out, just let me know if you have stainless or aluminized exhaust system.
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Old 03-28-2010, 06:15 PM
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I say do it!!! It does not make it a whole lot louder, but when you mash the fun pedal and run wot you will hear a real nice growl. The less restriction you can get, the better.
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Old 03-28-2010, 06:23 PM
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cat convertor

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Originally Posted by Pathfinder22 View Post
Not sure I understand this one???

Thought the Cat Converter was for emissions-only and nothing to do with optimal fuel economy and in fact it adversely impacts mpg???
Diesel convertors can rech up to 90% efficiency and reduce diesel odor and visible soot and the proper back pressure in the exhaust helps maintain proper EGT which is going to affect fuel economy and overall motor performance 2007 and later trucks are required by law to have one with a DPF as well
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Old 03-28-2010, 06:58 PM
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ok, now I am even more confused....and maybe it's me being a newbie w/ the F250 world??

So if the Diesel Cat Conv are soooo efficient and have other benefits, then why is there so much talk & so many folks running these trucks/power stroke diesel engines where they are removing the Cat Conv and upgraded from stock to 4"+ exhaust (turbo back and/or cat back) systems???

Thanks for any input.
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Old 03-28-2010, 06:58 PM
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Quote:
Originally Posted by nelosnst10 View Post
Diesel convertors can rech up to 90% efficiency and reduce diesel odor and visible soot and the proper back pressure in the exhaust helps maintain proper EGT which is going to affect fuel economy and overall motor performance 2007 and later trucks are required by law to have one with a DPF as well
Nice cut and paste. Diesels run better with less back pressure, gassers require some back pressure.
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Old 03-28-2010, 07:00 PM
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Quote:
Originally Posted by Pathfinder22 View Post
ok, now I am even more confused....and maybe it's me being a newbie w/ the F250 world??

So if the Diesel Cat Conv are soooo efficient and have other benefits, then why is there so much talk & so many folks running these trucks/power stroke diesel engines where they are removing the Cat Conv and upgraded from stock to 4"+ exhaust (turbo back and/or cat back) systems???

Thanks for any input.
The hippies want you to think that there is something conductive with the cat for your benefit!
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