Pros and Cons to cutting off the catalytic convertor??? - Ford Powerstroke Diesel Forum
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Old 04-04-2012, 12:49 PM
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Pros and Cons to cutting off the catalytic convertor???

I have a 95' (doesn't need to be emission tested) that I have already cut the muffler off and put in a strait pipe in place....

Thinking about doing the same thing with the cat, chop it, strait pipe it. Am I going to gain anything??? I would think you would hear the turbo more (which I would like) and maybe get a little more response performance wise.

Any input would be great!
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Old 04-04-2012, 01:04 PM
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My kitty ran away the same day I got the truck...and took the muff with her.
You'll have less restriction, so perhaps a slight increase in performance and decrease in EGT. This will vary depending on how plugged up the cat is. Most noticable change for me was the amount I could hear the turbo.
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Old 04-04-2012, 01:06 PM
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gain sound and response, lose weight
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Old 04-04-2012, 01:08 PM
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You can always just take it off and smash all of the ceramic honeycomb out of it, then put it back on and you wouldn't even need to find a piece of pipe to take its place.
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Old 04-04-2012, 01:29 PM
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Quote:
Originally Posted by ars5147 View Post
You can always just take it off and smash all of the ceramic honeycomb out of it, then put it back on and you wouldn't even need to find a piece of pipe to take its place.
This works good.
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Old 04-04-2012, 02:08 PM
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Quote:
Originally Posted by Skew12 View Post
This works good.
I havent run one on any of my last 3 psd trucks. Slight performance gain, less exhaust resrtictions, better mpg's and turbo whistle.

IMO i.would do the DIY intake ($40), 3" DP ($90), kitty delete($20) at the same time. You be amazed how much it wakes your truck up. Like I said not much in the way of HP but you will gain alot of throttle response...

Sent from my SPH-D710 using AutoGuide.com App
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Old 04-04-2012, 05:57 PM
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I "gutted" the one on my 94. I would recommend just taking it off and saving it (they are ridiculously expensive) just in case they change the testing rules (I live in Cali and you never know). After I did it, I thought about it and managed to find a new takeoff Cat (off an SD) for $10 on ebay (it's sitting in my garage). Get (or make) a "test pipe". Cheers!
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Old 04-04-2012, 08:46 PM
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Perfect, bye bye cat! Thanks for the input.....270,00 miles...I can only imagine how that cat looks in side!
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Old 04-04-2012, 09:26 PM
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pros - sound, egt's
cons - sound.

Sometimes the noise gets incredibly a-noise-ing ah ha... ah ha ha
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Old 04-08-2012, 12:05 AM
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Quote:
Originally Posted by STROKED_NY_023 View Post
I havent run one on any of my last 3 psd trucks. Slight performance gain, less exhaust resrtictions, better mpg's and turbo whistle.

IMO i.would do the DIY intake ($40), 3" DP ($90), kitty delete($20) at the same time. You be amazed how much it wakes your truck up. Like I said not much in the way of HP but you will gain alot of throttle response...

Sent from my SPH-D710 using AutoGuide.com App
This^^

Also do FPR mod, clean fpr screen, and clean your fuel bowl and new o-rings.

Mine has been a night and day difference doing the intake, DP, exhaust, FPR mod, and clean fuel bowl and fpr filter. Very basic things will make a huge difference.
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