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Superduty Gen.1 1999-2007 F250, F350, F450, F550

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  #1  
Old 11-12-2008, 04:53 PM
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Cutting out the cat

Hey every one is it true that a power stroker can't run with out a Cat?
I was told they can't because it has some thing to do with the back pressure from the cat is this true or BS.
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Old 11-12-2008, 04:56 PM
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Total BS. Most loud PSD's are running straight pipes. My brother is one of those.
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Old 11-12-2008, 06:02 PM
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My cat has been gutted with no problems.
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Old 11-12-2008, 06:04 PM
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Does is really make a difference more power better Mpg?
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Old 11-12-2008, 06:18 PM
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Dunno... But it sounds BA
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Old 11-12-2008, 06:25 PM
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It made the turbo whistle more. Shortly after I decided to delete the muffler. Now she has a good whistle. Not too loud.
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Old 11-12-2008, 06:38 PM
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Quote:
Originally Posted by TexasNomad View Post
Does is really make a difference more power better Mpg?
No Power or MPG differences, as the Cat provides very little back pressure. Only benefit is more turbo whistle.
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Old 11-12-2008, 06:43 PM
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Quote:
Originally Posted by blackhat620 View Post
No Power or MPG differences, as the Cat provides very little back pressure. Only benefit is more turbo whistle.
So then all that talk about the Banks exhaust kits and similar products that give you 25% more power are kinda bogus then?
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Old 11-12-2008, 06:45 PM
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The main benefit of exaust mods is to lower EGT's.

I love my whistle when it is setting there ideling.
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Old 11-12-2008, 06:54 PM
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Quote:
Originally Posted by TexasNomad View Post
So then all that talk about the Banks exhaust kits and similar products that give you 25% more power are kinda bogus then?
Yes for the most part. Banks Leads the pack with Bogus claims followed closely by the air filter people especially K&N.

Think about it this way, the manufactures spend millions of dollars trying to get maximum Hp, Torque and MPG out of there cars and trucks, then 5-minutes after the vehicle is released some A/M manufacture claims with a simple bolt on you can increase power & MPG by 25% or more. Not going to happen.

On the 7.3 PSD the exhaust muffler is a little restrictive, easiest way to increase exhaust flow is to install a Walket BTM muffler. Main benefit to this is lower EGT if you tow or haul heavy loads. You will see little to no performance or MPG increase. For air filtration on the 7.3 PSD best choice is the Motorcraft Donaldson Powercore up grade kit.

On the 6.0 the exhaust changes only benefit lower EGT when towing. For air filtration the Factory Donaldson Powercore on the 6.0 is the best system on the market.

One downside to opening up the exhaust on a stock PSD is that the power band is raised (ie the Torque & Hp numbers occur at a higher RPM) the lower the max Torque numbers occur in the RPM range the more useful they are for a truck that is used for towing or hauling heavy loads.
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