Do i need cats
Team Owner
Joined: Sep 2001
Posts: 62,067
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From: Athens AL
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Re: Do i need cats (ZRWANABE)
You might lose just a bit of torque off the line but youd gain hp further up in the band. Wont hurt anything.
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Joined: Aug 2000
Posts: 42,930
Likes: 18
From: Sydney, Australia
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St. Jude Donor '07-'08-'09-'10-'11-'12-'13-'14-'15-'16-‘17, '22
Re: Do i need cats (ZRWANABE)
I'm sure some of the LT1 guys will chime in but in Lingenfelters small block Chevy book he says they (the cats) cost about 10hp on an LT1. Dunno if it will cost you elsewhere if you remove them like vader 86 suggests - it might though.
I expect you'll be quicker without than with though..
I expect you'll be quicker without than with though..
Safety Car
Joined: Feb 2000
Posts: 4,562
Likes: 106
From: Austin Texas
Re: Do i need cats (ZRWANABE)
Then again, why mess with it? With the high-flow cats that are on the market today you can stay legal and fast.
Here in Texas I can't get the inspection done if the cats are not in place. Besides, it's really fun to beat the pants off of someone, then have them look over/under the car and see that it has a full exhaust system...including cats.
Here in Texas I can't get the inspection done if the cats are not in place. Besides, it's really fun to beat the pants off of someone, then have them look over/under the car and see that it has a full exhaust system...including cats.
Racer
Joined: Apr 2002
Posts: 389
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From: Micco FL
Re: Do i need cats (Joe90)
Aside from meeting inspection standards or needing to keep everything original, there is no reason why you cannot remove the cats. The main issue in later models, is the location of the O2 sensor. The '92 O2 sensor is in front of the cats and will therefore not notice any change.
Advanced
Joined: May 2002
Posts: 65
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From: Lakewood CO
Re: Do i need cats (PTz-92-LT1)
where is the o2 sensor on a "91" I was thinking about titling the vette in my moms county because the only inspection is visual and what I mean by visual is no smoke you pass, smoke you fail. I was going to run true dual 3' with no cats and a pair of flowmasters at the back I just didnt know what headders I was going to put on. Oh yea, how much better will my car run with out air emission pump and at the same time do an underdrive pully kit, will I notice a big difference?
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Advanced
Joined: Mar 2001
Posts: 53
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From: Michigan City in
Re: Do i need cats (PTz-92-LT1)
Aside from meeting inspection standards or needing to keep everything original, there is no reason why you cannot remove the cats. The main issue in later models, is the location of the O2 sensor. The '92 O2 sensor is in front of the cats and will therefore not notice any change.
the 92 has oxgen sensors before and after the cat on the right side
