How much advantage in performance and sound gains? currently I am running a Corsa pace car setup with a bassani x pipe and thinking of adding an off-road setup.. Has anyone used this magnaflow 15479 kit??

 

Makes it pretty loud. Not sure about power gains. It does make it hard to get a good video.

 

sounds mean...

 

That does sound mean, is that a factory cam? is that the magnaflow 15479 kit also?

 

Cam is 237/242 .609 112LSA. It has Borla Stingers, LT's, and no cats.

 

Dont do it. Trust me....It is louder, but isnt worth it for inspections and the smell

 

I second that,, forget it.

 

The previous owner had the cats hollowed out. It had a smell and set codes.

You smelt like raw fuel after a cruise with the top down. I drove ot for a year like this and got very tired of it.

Now after having the tune adjusted, the smell is gone, so are the codes.

 

Why bother?? The power gain is negligible and you will really tire of the raw fuel smell. Get high-flow CATs if you want more power and a good header system and CAT back if you want power and noise.

BC

 

I tried the Bassani front off-road pipe awhile, with Ti mufflers. Gained 12 HP, lost 12 TQ.
Smell was absolutely unbearable, and if I wound it out and let it rap down, it would occasionally pop like a high powered rifle out the back - unnerving.
I do have to say, though, it had a glorious Italian scream when it wasn't trying to blow the mufflers off.

DG

 

if you go with the high flow cats do you still have to run the air pump?

 

I agree--don't do it----Its louder yes--But it's an annoying loud---
If you are looking for a more racier sound--- go "mufflerless" I have no mufflers on mine just an x-pipe( which actually quieted it down some and got rid of the resonance)----driving around town it's not all that loud---but when you get on it ----it really sounds cool --like a race car rather than the other million low rumblers on he road--

 

DONT DO IT!!! There is very little gain to have by removing the cats. I have LG Street headers w/ their X-pipe with Corsa Extremes. ill post the video when i get off work. I purchased my exhaust w/o highflow cats and regret it. I already was aware about the smell and honestly since im a hardtop, it doesnt bother me. However that isnt the reason i just bought LG's highflow cats. The sound of my exhaust has a RASP to it i do not like between 2000-2600rpms. Plus it pops more than it should. The cats will cure this.

 

I want to get rid of the fuel smell.

anyone ever buy these?

http://performance-curve.com/3thunde...ter415300.aspx

 

Any reduction in the resistance of incoming and outgoing air will increase the efficience of the air pump (i mean engine).

No cats will increase the sound, yes. But, if you like a loud car then do it. I personally am gonna install the Magnaflow off-road pipe and I have Borla straight pipes.

Will it smell like raw fuel, maybe. It will be just like any old school Chevy pre-emissions muscle car or Vette (at least i'm pretty sure there was a time when cars did not have cats).

Personally, I like the sound and smell of a rumblin muscle car. And I prefer the smell of fuel rather than the rotten egg smell that can sometimes occur with cats (and I only mean the mild odor that naturally occurs, not the strong smell when there is a mechanical issue).

Eh, I just think emissions components are only there to reduce emissions, not to aid in horsepower or performance (fuel economy). And I just dont care about emissions, so there!!! na na na na

 

You won't get much with just a cat delete on a stock manifold and down pipe. Go headers and high flow cats and then with a tune you'll see a decent gain, likely around 30-40 rwhp. Superman here has an excellent deal on a XSpower header system and it's a nice looking system. Haven't got mine on yet but I'm not too worried about it fitting either. You're looking at $300 to delete the cats. Forget that, spend about $800 and get a complete long tube header system and some real HP gains.

High flow cats have been tested ny enough magazines and such enough different times that I can easily say they won't make enough difference to be measurable on a dyno. So, I really don't see why I'd want a car that smells and pollutes when there is no positive gain except being a cheap *** who doesn't want to put out the couple of $100 for cats.

I've got an older Impala (with fuel injection that runs quite well actually) and I can always smell the exhaust on me after driving it. I've actually considered putting cats on it too just because of that. I don't drive it much though so it's OK like that. But, I drive the Vette a lot during the summer and I don't want to stink at work every day or stink every evening after coming home. Some people may like that smell but I personally don't.

Peter

 

I think some people here have welded those into their "off road" OBX headers. I think there is a pipe secton right after the headers where those were welded in. Not sure but I guess they worked OK.

Peter

 

I had no cats, but switched about 9 months later. I couldn't take that smell any longer.

 

I hear the responses about the strong smell that these C5's produce when running without cats. I am getting more and more curious about this. I can't imagine how the C5 is much different than any of my older hot rods and muscle cars and they never produced a strong smell.

The only odor my older cars would produce would be that of natural exhaust coming from the tail pipes and only noticable when trainling behind the car or if the car were stationary it was mildly noticable when standing near the rear (or side) of the car.

I've always been able to tune a carb so that it wasn't overly rich and I would only hope that a sequential fuel injected motor would be better then even a tuned Q-Jet.

At the very least, I would hope that my Vette is not leaving so much fuel unburned that it would cause 'me' to stink. I think that if that were the case I'd want to fix that condition before installing cats.

I dunno, I think cats were only created to satisfy the EPA nuts and a well tuned engine should run quite clean without them, sure it wont be pure C02 and H2O coming outta the tail pipes, but certainly not raw fuel.

Lastly, it is good to be concious about the environment, but if I were that worried about it I'd be driving a Prius not a Vette. And it should be shunned to run catless on a C5 when its perfectly acceptable to run catless on an LT-1 '70 Vette.

p.s. bored at work

 

well for me...its not RAW fuel...Its just a stronger smell that is definately noticeable. When you run the heat or AC, if its not on recirculate and your sittin at a stoplight? your gonna smell like your exhaust. Not good when i have my girl in the girl