Cat Delete - any smell?

[DLTARNU]

For those of you running with no cats, what is the difference in the smell of the exhaust?

Does it have a more woodsy bouquet with a hint of saffron, or is it more like morning air after a gentle rain?

Just kidding - does it stink like an oil refinery explosion or not?

Thanks!

 

[Shelby3]

I have noticed no difference.

 

[Torquemonster]

cat smelt like rotten eggs






oops -

I'm bad - wrong cat

 

[SneakyPete]

No smell change. the only changes I noticed:
1) it will be louder.
2) exhaust exiting the car will be dirtier. your car is all black, wont be a concern. with the white stripes I have, it is now the #1 maintence / cleaning I have to do every time.
3) some hp increase over stock cats.

 

[MAMBA]

I know like most things loudness is subjective, but how much louder will a viper be with no cats. I currently have Belanger exhaust with cats in place and no headers yet but plan to put Belanger headers on by the first of the year. Without cats will the exhaust note be obnoxiously loud as you feel your head throbbing? Can you hold a conversation with the passenger without thinking he or she is lip synching?

 

[v10kingsnake]

i have done this mod over 4 months ago after reading a post here with a guy putting the straightpipes in place on the cats. notonly was it easy, it was cheap as hell (30 bucks), totally do-it-your self, adds more horsepower over stock or high flow cats, and all the heat is GONE. now i cant speak for the other guys that are saying there cars dont smell different. maybe there cars are unique? mine has a slight but very noticable odor that you would expect it to without cats. some say people behind you will ***** and others say that you could pass out in traffic from the fumes. NO WAY did I experience any of these situations. now if emmisions is a concern for you then you have to go with the cats to pass, in nj i applied for the special inspection exempt sticker so not only didnt the car have to pass any emmission tests but it took NO tests to get my stick. cost 25 bucks at DMV and the Only stipulation is miles driver each year on the car. i think it was no more than several thou, like 7 maybe. i put maybe 1500 year on mine. on later creampuff models i understand that you have to buy the cat sims if you dont want to trip the engine light, on my 97 it wasnt an issue. no light no problems. and car dyno'd 18 more horse to the wheels with out the cats. i am told on the juice is where not having those cats will be most benefial, i will let you all know soon...

 

[plumcrazy]

NO smell

 

[GTSJERRY]

No smell here.

 

[Bandit3]

Gen one, Bellanger headers, three inch pipes and no cats-- no smell and LOUD!! I love it!

 

[RedEnuf93]

No smell, but loud...

 

[GTS Bruce]

Loud.Stronger smell.But if you can smell it you're not going fast enough.Side sills slightly warm to the touch.Car interior cooler too. Bruce

 

[GR8_ASP]

Well I guess I will be the naysayer here. I have done it with 2 Vipers (Gen I and III). Same thing in that there is an acrid fuel smell present, especially after a cold start in an enclosed area (like a garage).Once the engine and exhaust is hot the smell diminishes significantly, but is still present. If you drive behind a Viper without cats you can smell when it goes to WOT. At part throttle it is not evident. But at WOT, oh yea!


But the final question is, is it worth it. Yes, as long as you do not have emissions testing. But, with stock headers and mufflers my Gen III only gained 5 RWHP. In essence the cats were not the cork (the darned crossover is). But the real reason is heat related. I just could not stand to drive it top down on hot summer days. Thus the cats are garage decoration.

 

[FLOORIN04]

Ron,Did it trip your check engine light?


Quote: But the real reason is heat related. I just could not stand to drive it top down on hot summer days. Thus the cats are garage decoration.

 

[SUN RA KAT]

This is disgusting. Have a nice day.

200+ cats reportedly found in house

KTUU-TV 2 Anchorage | Submitted by: EZ-Cheese

"A disturbing discovery was made Wednesday inside a South Anchorage home. Police found more than 200 cats and other animals inside, living in unsanitary conditions. Neighbors thought something was wrong with the septic system, saying they've been smelling it for years. The stench coming from a house on North Circle prompted a nearby resident to call the police this week... 'There were just cats everywhere,' said Officer Jackie Valdez, who was first on the scene. 'At first, my estimate was at least 100.' That estimate soon jumped to at least 200 cats, plus several dogs, birds and even chickens. Officer Valdez says all of them were living in their own waste, with little food and no clean water."

Yes, eliminating cats will make it smell better.

 

[LETHAL GTS]

Smells great!
I have my car running fairly rich at the low end. So I can smell the exhaust at the lights, driving slow etc.
But, like I mentioned above, I love it!

 

[Marc Lublin]

Haven't really smelled a difference, but expect it to be MUCH louder. I've been contemplating putting some hi flows on for a while because of the sound, but can't stand the thought of losing a few HP.

 

[GR8_ASP]

No MIL codes, but I use O2 simulators. Note you only lose the downstream O2 sensors. The upstream are needed for engine management.

 

[garolittle]

Anyone experience loss of back pressure by going cat-less. I have the Random Tech Hi-Flows and I have considered going cat-less but I do not wish to lose any low-end torque.

 

[Russ M]

A bit more smell, mostly when you have your top off and come to a complete stop.

 

[Bill Pemberton Woodhouse]

Just a personal observation from folks I know who have done this. The Viper runs very rich and one should expect to get an unburned fuel smell at times. Just mention this , as we do not take them off, but we have had to replace cats when some adoring spouses claimed they couldn't stand the odor. Food for thought before you do it, and many feel some back pressure is beneficial.

Have a great weekend.

 

[Go Fast For Life]

Loud is right! I have a SPL meter and measure over 90dB inside the passenger compartment!

When I start the engine, small children and the elderly start running. It irritates the neighbors, and my wife hates it. I'd say it's just about PERFECT!

 

[Achilles99]

When I removed the cats on my 98, I didn't like the smell. I also felt like I lost some low-end torque (seat of the pants feel, never dyno'd it).

I then put on hiflows, but then couldn't stand the high sidesill temps (better than stock cats, but not as cool to the touch as no cats).

It's all a tradeoff!

 

[DLTARNU]

Achilles,

(Ever since watching 'Troy' whenever I read the name Achilles, in my head, it sounds like when Brian Cox (Agamemnon) was shouting for him to do battle)

So...

A-KILL-EEEEEZ!

What kind of hi-flows did you put on?