LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Quick Question about exhaust

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Old 09-11-2008, 10:27 AM
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Default Quick Question about exhaust

Right now I'm running a Magnaflow Highflow cat along with my Mangnaflow 3'' cat back..my question is, would I notice or gain anything by eliminating the catalytic converter??
Old 09-11-2008, 10:36 AM
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You'll notice that it's a whole lot louder and smellier LOL
Eliminating the cat (or replacing with a high-flow) will net you a good 5rwhp.
Old 09-11-2008, 10:40 AM
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Originally Posted by James Montigny
You'll notice that it's a whole lot louder and smellier LOL
Eliminating the cat (or replacing with a high-flow) will net you a good 5rwhp.
The smell and sound factor I figured as much

It's a high-flow cat that I would be taking off. I figured by taking it off that maybe it would give me a couple more ponies just wasn't sure or if it would be worth it or not.
Old 09-11-2008, 10:41 AM
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I have hooker exhaust and just dropped the cat. Barely louder, some gas smells, but sounds much better.
Old 09-11-2008, 10:47 AM
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Keep in mind that Portland has emissions laws.
You will fail a visual inspection if you don't have cats.
http://www.dmv.org/or-oregon/smog-check.php

Tampering with emissions systems is illegal.. blah blah blah .... you get the point.
Old 09-11-2008, 10:50 AM
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Originally Posted by James Montigny
Keep in mind that Portland has emissions laws.
You will fail a visual inspection if you don't have cats.
http://www.dmv.org/or-oregon/smog-check.php

Tampering with emissions systems is illegal.. blah blah blah .... you get the point.
Lol...know all about emmissions bro...lol believe me! I can't stand the crap they try and pull here. I just passed deq the other day and I will be good for two years now. I figured I would just put it back on when it comes time to go through emissions again
Old 09-11-2008, 11:00 AM
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I had a hi-flow and a borla on my car and when i replaced the cat with a cutout. I didn't notice anything, so i'd say since you have emissions then just keep it.
Old 09-11-2008, 02:21 PM
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I probaly have the same cat as you and I stick it after my y-pipe when I have inspection. The car is a little louder at idle and a tad bit overall when its off but there is no power difference that I can feel at all.
Old 09-11-2008, 04:31 PM
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eliminating the cat wil give you better hi end power but it will feel as if you lost a little bit torque.
A friend of mine put his cat in and he was able to chirp the gears but when he took it out he couldnt, but he noticed more of a pull on the top end.
Old 09-11-2008, 09:17 PM
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Originally Posted by NorCalLt4
eliminating the cat wil give you better hi end power but it will feel as if you lost a little bit torque.
A friend of mine put his cat in and he was able to chirp the gears but when he took it out he couldnt, but he noticed more of a pull on the top end.
If your buddy couldn't chirp gears after he took the cat off then his **** must be a V6 or run really weak
Old 09-11-2008, 09:18 PM
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Originally Posted by StealthFormula
I probaly have the same cat as you and I stick it after my y-pipe when I have inspection. The car is a little louder at idle and a tad bit overall when its off but there is no power difference that I can feel at all.
I think you do cause I remember talking to you about it a while back. I'm not gonna bother with it.
Old 09-11-2008, 09:20 PM
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Originally Posted by Elliott's94Z
If your buddy couldn't chirp gears after he took the cat off then his **** must be a V6 or run really weak
it was a bone stock lt1 with some real good tires and a stock clutch..
now he has an ls1 in it, UPGRADE!
Old 09-11-2008, 09:23 PM
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Originally Posted by NorCalLt4
it was a bone stock lt1 with some real good tires and a stock clutch..
now he has an ls1 in it, UPGRADE!
So he didn't put the LS1 in it because of the chirp thing did he
Old 09-11-2008, 11:40 PM
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WOW!!! that is a weak LT1 even if it did have "GOOD" tires it still chirp them...when i had my a4 with 2:73s with a power programmer i could chirp them going into second and of course first both with trac-control on..lol..he needed to have that lt1 checked out and man what a no no sticking an ls motor in his car!! thats no good..just became another one of those "lets act like our car is better because we have individual coils" poeple lmao..
Originally Posted by NorCalLt4
eliminating the cat wil give you better hi end power but it will feel as if you lost a little bit torque.A friend of mine put his cat in and he was able to chirp the gears but when he took it out he couldnt, but he noticed more of a pull on the top end.

but anyways good choice on keeping it...if if it is a highflow its not that much restriction on your motor anyways and def not worth the trouble to take it off and notice a whole lot of nothing
Old 09-11-2008, 11:48 PM
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Alright guys! I just got done taking the hacksaw to the Cat. Drove it and I swear it gained about 22-23rwhp..lmao
Old 09-11-2008, 11:51 PM
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Originally Posted by James Montigny
Keep in mind that Portland has emissions laws.
You will fail a visual inspection if you don't have cats.
http://www.dmv.org/or-oregon/smog-check.php

Tampering with emissions systems is illegal.. blah blah blah .... you get the point.
SMOG LOL WHO CARES ABOUT SMOG U CAN FIND A GUY TO PASS IT FOR A HUNDRED BUX U JUS GOTTA ASK AROUND AND I GET IT DONE IN CALIFORNIA
Old 09-11-2008, 11:55 PM
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Originally Posted by Elliott's94Z
Alright guys! I just got done taking the hacksaw to the Cat. Drove it and I swear it gained about 22-23rwhp..lmao
wow man i didnt think that it would feel or even gain anywhere near that much...nice job and congrats on the power adder...does it sound better?
Old 09-11-2008, 11:57 PM
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Originally Posted by jarretthise
wow man i didnt think that it would feel or even gain anywhere near that much...nice job and congrats on the power adder...does it sound better?
Did you catch the "lmao" at the end...
Old 09-12-2008, 12:02 AM
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Originally Posted by Elliott's94Z
Did you catch the "lmao" at the end...
How badass would it be if we could gain that much just by cutting a cat off......damn. haha

But on a serious note. We have dbag cops that will lay down to see if we have cats here even when we DON'T have emission testing where I live. So hope you don't have any of those cops there.. I gotta rig up a way to make it look like I have my cat still on.. Enjoy the extra noise!
Old 09-12-2008, 12:08 AM
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did you catch the FEEL in the middle lol...i knew it wouldnt add much but i didnt think it would even feel like anything at all



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