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Big Jim
Hard-core CEG'er

Reged: 09/03/00
Posts: 4693
Loc: Thousand Oaks, California, USA
More about cats
#1301440 - 08/16/06 07:26 AM

I'll keep this brief. My neighbor's experience with getting his 96 SE smogged. HC was just a little over the test limit even with the cat hot.

Gutted pre-cats
Y pipe mod
Hi flow aftermarket cat
SVT cat-back
Passed smog check two years ago equipped as above
Did not pass this year
Evidently smog specs are tighter this year
Tried adding stock cat behind hi flow cat - didn't help

At this point he researched and found that he needed an OBD II cat. I have not heard of them before, but he learned that it is more expensive and nore effective. He found a source for one that is speced for use behind an engine up to 5.7 liters so it should flow well and be big enough to clean things up.

Results with this cat by itself and the rest of the exhaust as above - it easly passed with very low readings. HC was down to something like 12.

Engine seems to perform about the same.





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Jim Johnson
98 SVT
03 Escape Limited

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BlackE1
Veteran CEG'er

Reged: 08/17/02
Posts: 853
Re: More about cats new
#1301472 (Re: Big Jim) 08/16/06 12:29 PM

Interesting, I assume there is a major price difference between the regular cat and this OBD-II cat?

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98.5 Black SVT with 34k miles Build #5683 Born on 4\15\1998
WR Headers GMK CAI
Blaupunkt system fiberglass tweeter pods
L.E.D. tail lights in the works


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Tony2005
Addicted CEG'er

Reged: 06/19/05
Posts: 5345
Loc: Virginia, USA
Re: More about cats new
#1301524 (Re: Big Jim) 08/16/06 02:06 PM

What was the brand of the OBD II cat?

I read about OBD I cats but those were the ones with only the bung for the upper O2 sensor and no lower O2 sensor bung.




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"Always do the cheap and easy ones first."

1996 V6 ATX 96K miles


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Big Jim
Hard-core CEG'er

Reged: 09/03/00
Posts: 4693
Loc: Thousand Oaks, California, USA
Re: More about cats new
#1301637 (Re: Tony2005) 08/16/06 05:24 PM

I'll see if I can get a brand and part number. Yes, it is much more expensive, but as you can see, it works.

--------------------
Jim Johnson
98 SVT
03 Escape Limited

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Big Jim
Hard-core CEG'er

Reged: 09/03/00
Posts: 4693
Loc: Thousand Oaks, California, USA
Re: More about cats new
#1304860 (Re: Big Jim) 08/23/06 12:02 AM

The brand name is Sound Design. A Google search shows that Sound Design is a Magnaflow brand for cats. I did not get a part number.



--------------------
Jim Johnson
98 SVT
03 Escape Limited

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