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Cats and Emissions Testing

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Old 12-15-2007, 01:01 PM
  #11  
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Originally Posted by Ponyryd
Welcome to the club.

Why are your cats punched out? you gain maybe 3hp with cats gone and then have all these problems. IMO you should get a nice catted H or X and be done with it, get a 2 1/2" pipe and you'll likely GAIN power and have a similar sound.
Punching the cats out was a silly thing I did in my younger days back in 93 a couple of months after buying the car.

I want to enjoy a weekend drive in the stang again now that my kids are old enough to appreciate a cruise in "their fast car that's asleep in the garage" and my wife has been dying take it for a spin again.

Thank you all for your replies and advice. It looks like I will have to replace the H pipe...hmmm...flowmasters at the same time...

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Old 12-15-2007, 01:35 PM
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^Did you punch all 4? the fronts are hard to get to, unless you cut the pipe or the cat. With the front cats alone-you should be able to pass.................
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Old 12-15-2007, 02:28 PM
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Originally Posted by Ponyryd
^Did you punch all 4? the fronts are hard to get to, unless you cut the pipe or the cat. With the front cats alone-you should be able to pass.................
Hi Ponyryd, appreciate your feedback. All 4 are completely cleaned out and I remember the front being a challenge.

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Old 12-15-2007, 02:44 PM
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Ok, well good luck with it and let us know what you decide..........
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Old 12-16-2007, 12:18 AM
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It's possible to pass without them.

My E-test on my '87 with no cats, by-passed pollution pump (it seized), timing at 4 degrees and Ultra 94 in it:



But look how close it was. For a car that would never need another E-test at the time, I wasn't concerned. But you will always need to have that car E-tested, so putting cats on it may not be a bad idea.
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Old 12-16-2007, 04:06 AM
  #16  
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You actually passed with no cats...?
Damn car must have ran good & clean.

WOW is that ever close. I new a guy, that new a girls mother, that new a Ape, witch he new a guy that once said........
I guess it doesn't matter if you pass by 1.00000 or 0.00001 passing's passing LOL
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Old 12-16-2007, 12:01 PM
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Yep, that engine was always healthy. It's the same one that is now sitting in the Capri.
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