Let's talk about deleting cats.

[Jeffsss]

I'm really considering this.
I saw a kit from ROE that replaces the cats with straight pipes and gives you all the hardware and correct fit.
I can only assume that once the sills are removed you'll need to cut the cats off?
how difficult of a job is this, seems pretty straight forward.. my biggest concern is taking the sills off/on and making them look like nothing happened.
having the car run a little cooler would be huge for me down here in FL.

 

[Allan]

Take the cats off, and enjoy the car.

 

[Jeffsss]

I'm intend on it.. looking for the best route.

exhaust shop, cat delete pipe kit. ? I feel like i can handle this project.

 

[Allan]

The Roe kit should do you good. Talk to Sean or Mike about it. They are very helpful with 'real world' answers, if you need any install advice. Those guys are great.

 

[01viper4me]

I'm really considering this.
I saw a kit from ROE that replaces the cats with straight pipes and gives you all the hardware and correct fit.
I can only assume that once the sills are removed you'll need to cut the cats off?
how difficult of a job is this, seems pretty straight forward.. my biggest concern is taking the sills off/on and making them look like nothing happened.
having the car run a little cooler would be huge for me down here in FL.

I literally just took mine off last week with the ROE kit. I am very novice when it comes to doing any engine work on my own and I was able to do this by myself. I recommend getting the cat simulators from them. I bought the XCalibrator from ROE and had them do a tune to make sure that my CEL would not come on; however, it comes on every time I drive it (takes 30 seconds to clear it so its no big deal). A couple things to consider. I recommend getting a high temperature muffler repair kit/tape to wrap both ends of the pipes once you fit them (unless you are going to weld the pipes). I had trouble completely preventing the exhaust from leaking out until I went and bought them. I also recommend going and buying 4 standard U style muffler clamps as they do a little better job of sealing the pipes than the clamps ROE provides. Other than that taking the side sills off is extremely easy. There are 12 bolts for a GEN II (2 under the hood, 4 under the door, and 4 under the bottom) per sill.
I am having a complete blast with my cats off as the engine now sounds like a Viper always should have!

 

[klamathpro]

GEN1 or 2? GEN1's sound too raspy with a cat delete on most exhausts and I've heard plenty of them, just too short a distance to the side exits. Honestly, I have high flow cats in both and love that they cut down any raspyness that catless tend to have. I have been told by many people, including owners, that both my Vipers have the best sounding exhausts they've ever heard. But if you are keeping the stock mufflers, deleting the cats won't sound too raspy on a GEN1, and not raspy at all on a GEN2, and will enhance the sound quite a bit.
When you go to cut your cats out, remember to measure twice and cut once. Leave enough slack for the sleeve to fit over and remember that the engine moves under load.

 

[dave6666]

Get hi-flows and ventilate your sills. Works in the 115 degree summers we have in Dallas. Dave's sills = not hot. Car sounds badass with cats.

 

[Leslie]

I toasted my high flows so I just removed the cats and put a straight pipe. I had a viper buddy I trusted to remove the side sills, then we drove the car over to a muffler shop he uses.
I do have corsa exhaust still.
Cost me $50.
Sounds much better too.

 

[speedracervr4]

I toasted my high flows so I just removed the cats and put a straight pipe. I had a viper buddy I trusted to remove the side sills, then we drove the car over to a muffler shop he uses.
I do have corsa exhaust still.
Cost me $50.
Sounds much better too.

Did the same thing for my buddy. We also had the exhaust shop remove the rear muffler at the same time and the total cost was $200.

 

[Jeffsss]

I literally just took mine off last week with the ROE kit. I am very novice when it comes to doing any engine work on my own and I was able to do this by myself. I recommend getting the cat simulators from them. I bought the XCalibrator from ROE and had them do a tune to make sure that my CEL would not come on; however, it comes on every time I drive it (takes 30 seconds to clear it so its no big deal). A couple things to consider. I recommend getting a high temperature muffler repair kit/tape to wrap both ends of the pipes once you fit them (unless you are going to weld the pipes). I had trouble completely preventing the exhaust from leaking out until I went and bought them. I also recommend going and buying 4 standard U style muffler clamps as they do a little better job of sealing the pipes than the clamps ROE provides. Other than that taking the side sills off is extremely easy. There are 12 bolts for a GEN II (2 under the hood, 4 under the door, and 4 under the bottom) per sill.
I am having a complete blast with my cats off as the engine now sounds like a Viper always should have!

thanks, yeah, I do plan on getting sims. what is the xcalibrator? it clears the CEL? thanks for the tip on the muffler clamps, and yeah I planned on wrapping them, I didnt plan on welding so thanks for the tape suggestion.
thanks for the tip on the muffler clamps and

 

[Jeffsss]

Get hi-flows and ventilate your sills. Works in the 115 degree summers we have in Dallas. Dave's sills = not hot. Car sounds badass with cats.

what are you doing to venilate the sills?

 

[Jeffsss]

GEN1 or 2? GEN1's sound too raspy with a cat delete on most exhausts and I've heard plenty of them, just too short a distance to the side exits. Honestly, I have high flow cats in both and love that they cut down any raspyness that catless tend to have. I have been told by many people, including owners, that both my Vipers have the best sounding exhausts they've ever heard. But if you are keeping the stock mufflers, deleting the cats won't sound too raspy on a GEN1, and not raspy at all on a GEN2, and will enhance the sound quite a bit.
When you go to cut your cats out, remember to measure twice and cut once. Leave enough slack for the sleeve to fit over and remember that the engine moves under load.

sorry, I guess I could have clairfied, it's a Gen II.

 

[01viper4me]

thanks, yeah, I do plan on getting sims. what is the xcalibrator? it clears the CEL? thanks for the tip on the muffler clamps, and yeah I planned on wrapping them, I didnt plan on welding so thanks for the tape suggestion.
thanks for the tip on the muffler clamps and

The XCalibrator is their plug in computer to check engine diagnostics as well as run tunes. It will read the Check Engine Light (CEL) and tell you what code is flashing, (mine is always the 0420 which is for the catalysts) and then you can clear the code so your CEL turns off.

 

[dave6666]

what are you doing to venilate the sills?

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[Jeffsss]

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that's pretty awesome, but I couldnt do that myself.

 

[Jeffsss]

The XCalibrator is their plug in computer to check engine diagnostics as well as run tunes. It will read the Check Engine Light (CEL) and tell you what code is flashing, (mine is always the 0420 which is for the catalysts) and then you can clear the code so your CEL turns off.

found it.. $500. damn, but it does have other benefits it looks like.. do you still run with O2 sims even though it says it disables it?

 

[v10enomous]

Just buy some straight pipes and clamps and use the spark plug non foulers on the rear sensor. I think this is the only reason that sell spark plug non-foulers these days... Ditch the rear mufflers too.

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Crank up the volume...

http://www.youtube.com/watch?v=_fDI0y5pWxw

 

[Jeffsss]

Just buy some straight pipes and clamps and use the spark plug non foulers on the rear sensor. I think this is the only reason that sell spark plug non-foulers these days... Ditch the rear mufflers too.

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Crank up the volume...

http://www.youtube.com/watch?v=_fDI0y5pWxw

sounds like a powerboat out of water.. haha..

I'll run no cats soon.. just getting opinions.. thanks for the pics/vids.. very entertaining.

 

[v10enomous]

sounds like a powerboat out of water.. haha..

I'll run no cats soon.. just getting opinions.. thanks for the pics/vids.. very entertaining.

Best thing I ever did. It's like a different car without the hot sills and interior and it sounds great inside the car but forget about using voice commands on your smartphone... Great sound accelerating under load and even better when downshifting for engine braking... Over 5,000 miles now without a single CEL.

 

[Jeffsss]

Best thing I ever did. It's like a different car without the hot sills and interior and it sounds great inside the car but forget about using voice commands on your smartphone... Great sound accelerating under load and even better when downshifting for engine braking... Over 5,000 miles now without a single CEL.

youre not runnng O2 sims or anything?? I know it's not a big deal but i absolutly hate dash lights.

 

[speedracervr4]

He's running foulers...the silver things in his first picture.

 

[Jeffsss]

He's running foulers...the silver things in his first picture.

oh i see that now.

okay, which one of you guys wants to fly into tampa and help me? haha

 

[v10enomous]

You need 2 non-foulers for each side. You have to drill the one that's directly on the sensor to get the depth for the sensor clearance and then put an un-drilled sensor on the first sensor. It just limits the exposure to the exhaust gas by reducing the surface area and backing the sensor out of the direct flow of the pipe.

 

[Jeffsss]

You need 2 non-foulers for each side. You have to drill the one that's directly on the sensor to get the depth for the sensor clearance and then put an un-drilled sensor on the first sensor. It just limits the exposure to the exhaust gas by reducing the surface area and backing the sensor out of the direct flow of the pipe.

any particular one better than another? do I just ask the guys at the autoparts store for fittment of the fowler.. sorry if these are elementry questions.

edit: and do sensor wires plug right up into the plugs?

 

[v10enomous]

There are a bunch of threads here... The non-fouler part#'s are in there somewhere...

http://forums.viperclub.org/search.php?searchid=523007

 

[BlackSnake99]

Personally, I find a burlap sack, a cinder block and a bridge over a body of suitably deep water the best way to delete cats.

 

[Jeffsss]

found this gem: http://www.energeticforum.com/renew...odification-using-spark-plug-non-foulers.html

thanks all!

 

[fe4snake]

I did remove my cats after my engine build and it sounds great. One question that I do have is that after the removal. I get more black carbon deposit out of my exhaust tips then when I had the cats on. Is this normal? Also due to my exhaust is all stainless steel I get more moisture from condensation during cold starts which with the carbon makes for a dirty garage floor. My wife is on my case about it. Is this normal if you remove the cats?

 

[dave6666]

One question that I do have is that after the removal. I get more black carbon deposit out of my exhaust tips then when I had the cats on.Is this normal? Also due to my exhaust is all stainless steel I get more moisture from condensation during cold starts which with the carbon makes for a dirty garage floor. My wife is on my case about it. Is this normal if you remove the cats?

I can't help but rolling on the floor laughing at posts like this. You remove the devise that destroys the unburned hydrocarbons in the exhaust gas mixture, and then wonder where all that black soot comes from. Hmm...

 

[DrumrBoy]

I consider the patches on the floor to be badges of honor. I'm just careful to not back in and put those marks on the wall.