Gutted CATS..............................
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Re: Gutted CATS.............................. (Buckmaster)
I have hand ported 'High Flow' cats on my 383. It definately gives a deep sound to the exhaust and it picks up a few ponies.
Keith
Keith
Racer
Joined: Dec 2001
Posts: 288
Likes: 0
From: Houston Tx.
Re: Gutted CATS.............................. (Buckmaster)
On a big cubed motor you WILL notice a difference in power and sound. The only downside in my opinion is the smell but I just deal with with it cause I just love the sound. You won't hurt anything by doing it except for a few treehuggers. Gut those suckers!
:yesnod:
:yesnod:
Le Mans Master
Joined: Apr 1999
Posts: 6,129
Likes: 14
From: Vette
Re: Gutted CATS.............................. (Buckmaster)
If you want Off-road setup, I wouldn’t bother gutting cats, but put an off road X-pipe (not straight pipes), right behind the headers (where the cats are)
I bet straight pipes would make more power than gutted cats and
X-pipe will make even more power than straight pipes…
As a bonus you save your cats which you can always use to pass emissions, etc.
P.S. All codes could be taken care of by LS1Edit :yesnod:
[Modified by EuG, 1:02 PM 3/7/2003]
I bet straight pipes would make more power than gutted cats and
X-pipe will make even more power than straight pipes…
As a bonus you save your cats which you can always use to pass emissions, etc.
P.S. All codes could be taken care of by LS1Edit :yesnod:
[Modified by EuG, 1:02 PM 3/7/2003]
Le Mans Master
Joined: Aug 2001
Posts: 6,725
Likes: 5
From: Colesville MD
Re: Gutted CATS.............................. (Buckmaster)
Straight pipes will flow better than gutted cats due to the fact that a gutted cat causes turbulance. The larger the motor, or for forced induction, the less restrictive the exhuast, the better. On a stock cube motor with minor bolt ons, replacing the stock cats with high flow cats would be fine. That way you make more horsepower, and still can hug trees!!!
Greg
:steering:
Greg
:steering:
Melting Slicks
Joined: May 2000
Posts: 2,974
Likes: 5
From: CenTex Texas
Re: Gutted CATS.............................. (Buckmaster)
Umm....I'm telling PETA!
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.J/K :rofl:
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Go with an off-road X-Pipe right behind the headers for the most gain on a big cubed motor :cheers:
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.J/K :rofl:
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Go with an off-road X-Pipe right behind the headers for the most gain on a big cubed motor :cheers:
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: Gutted CATS.............................. (Maineiac)
you can always buy a main cat-free "H" pipe (X pipe) and swap out the factory one.
That way you can always convert back if needed. The factory "H" pipe is expensive; and this is due to it containing the main cats which are the bulk of the cost. But an aftermarket setup -sans cats- shouldn't "theoritically" be all that expensive. :skep:
[Modified by Mike Mercury, 1:20 PM 3/7/2003]
That way you can always convert back if needed. The factory "H" pipe is expensive; and this is due to it containing the main cats which are the bulk of the cost. But an aftermarket setup -sans cats- shouldn't "theoritically" be all that expensive. :skep:
[Modified by Mike Mercury, 1:20 PM 3/7/2003]
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Le Mans Master
Joined: Apr 1999
Posts: 6,129
Likes: 14
From: Vette
Re: Gutted CATS.............................. (Buckmaster)
As far as gutted cats vs. straight pipes I’d say that smell and loudness would the same with both.
Like I previously said, straight pipes would most likely make a bit more power than gutted cats, but either should make more power over full cats.
I got ~20wrHP with straight pipes over high flow cats (even more gain later on with X-pipe over straight pipes) (do a search - you’ll find the graphs I posted)
For best results you may wanna consider redoing your exhaust to have an X-pipe right behind the headers.
Maybe something to think about in the future.
You could try that 3” Stainless Works exhaust. :)
Good luck! :cheers:
Like I previously said, straight pipes would most likely make a bit more power than gutted cats, but either should make more power over full cats.
I got ~20wrHP with straight pipes over high flow cats (even more gain later on with X-pipe over straight pipes) (do a search - you’ll find the graphs I posted)
I already have an x-pipe but it is behind the CATS.
Maybe something to think about in the future.
You could try that 3” Stainless Works exhaust. :)
Good luck! :cheers:
Le Mans Master
Joined: Apr 1999
Posts: 6,129
Likes: 14
From: Vette
Re: Gutted CATS.............................. (Buckmaster)
Is the way I have it (the x-pipe after the CATS) hurting anything? i.e. performance, tq, anything????
Keep in mind - every car is different too, so there’s no way to know for sure :nono: how much you gain/if you gain something w/o actually doing it…
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: Gutted CATS.............................. (YELLOHHH)
Straight pipes will flow better than gutted cats due to the fact that a gutted cat causes turbulance. The larger the motor, or for forced induction, the less restrictive the exhuast, the better. On a stock cube motor with minor bolt ons, replacing the stock cats with high flow cats would be fine. That way you make more horsepower, and still can hug trees!!!
Greg
:steering:
Greg
:steering:
Don't gut em. They will cause turbulence...I gutted mine!! I am looking to have straight pipes welded in..Or go to a high flow cat. I hate the smell!!!!!!
Le Mans Master
Joined: Apr 2001
Posts: 5,331
Likes: 39
Re: Gutted CATS.............................. (Face)
I love the smell of a catless exhaust.... :crazy: :D
I'm getting ready to make on "off road" pipe and eliminate the cats. I've got an intermiediate pipe with cats and an X pipe for street/emmisions testing but for the track I'm going to make a middle section without the cats.
Here's my question: can I weld in the X section to the front of the stock H pipe that will bolt to my cat-back. the stock H pipe was left over when I put on the Magna-Flow X pipe.
cutting the stock H pipe out will cause me to have to set up a jig to make sure the pipes are in the correct position (so the tail pipes are even) before I weld in the X pipe section.
If I could leave in the stock H pipe, I could insure the pieces would align properly. I would just have to add the X section to the stock pipe left overs and then enough straight pipe to fit into the headers.
