Delete cat to make exhaust louder?
02-25-2009, 06:46 PM
#51
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Car: 89RS(other cars & pics in vBgarage)
Engine: LO3, 305 TBI Mildly Modified
Transmission: BakerBuilt 700R4 w/B&M Megashifter
Axle/Gears: 3.23 Auburn Pro Series LSD
Re: Delete cat to make exhaust louder?
Well, the moderators at TGO need to get busy. Doing any of the following is as illegal as removing a cat.
* Removing the EGR valve or plugging its vacuum lines
* Removing or disconnecting the PCV valve
* Removing the stock air cleaner and heat riser duct plumbing
* Removing the catalytic converter
* Removing or disconnecting the air pump
* Removing or modifying the stock distributor vacuum advance/retard
* Altering the stock ignition advance mechanism or timing curve
* Replacing the stock distributor with an aftermarket unit that is not emissions certified
* Modifying, removing or replacing the stock computer or PROM chip with a non-certified component
* Blocking the heat riser duct under the intake manifold
* Knocking out the filler restrictor on the fuel tank inlet pipe
* Replacing the stock non-vented gas cap with a vented cap
* Removing or disconnecting the fuel vapor recovery canister
* Changing the idle mixture or stock carburetor jetting
* Removing or modifying the carburetor choke
* Modifying or replacing the carburetor accelerator pump with non-certified components
* Installing an intake manifold or racing manifold that lacks provisions for the stock EGR valve and/or a heat riser duct
* Installing a carburetor that lacks the stock emission hookups
* Installing non-certified fuel injectors
* Installing a long duration "racing" cam that is not emissions-certified
* Installing exhaust headers that lack provisions for a heat riser valve, an air cleaner preheat stove or fittings for an oxygen sensor (if required)
* Installing valve covers with open breathers or no fittings for a PCV valve
* Installing any induction, fuel or ignition system component that is NOT emissions legal
You know what they say about people who live in glass houses.
* Removing the EGR valve or plugging its vacuum lines
* Removing or disconnecting the PCV valve
* Removing the stock air cleaner and heat riser duct plumbing
* Removing the catalytic converter
* Removing or disconnecting the air pump
* Removing or modifying the stock distributor vacuum advance/retard
* Altering the stock ignition advance mechanism or timing curve
* Replacing the stock distributor with an aftermarket unit that is not emissions certified
* Modifying, removing or replacing the stock computer or PROM chip with a non-certified component
* Blocking the heat riser duct under the intake manifold
* Knocking out the filler restrictor on the fuel tank inlet pipe
* Replacing the stock non-vented gas cap with a vented cap
* Removing or disconnecting the fuel vapor recovery canister
* Changing the idle mixture or stock carburetor jetting
* Removing or modifying the carburetor choke
* Modifying or replacing the carburetor accelerator pump with non-certified components
* Installing an intake manifold or racing manifold that lacks provisions for the stock EGR valve and/or a heat riser duct
* Installing a carburetor that lacks the stock emission hookups
* Installing non-certified fuel injectors
* Installing a long duration "racing" cam that is not emissions-certified
* Installing exhaust headers that lack provisions for a heat riser valve, an air cleaner preheat stove or fittings for an oxygen sensor (if required)
* Installing valve covers with open breathers or no fittings for a PCV valve
* Installing any induction, fuel or ignition system component that is NOT emissions legal
You know what they say about people who live in glass houses.
well i have done just about all of them things and so have 90% of the members on here have atleast one of the things done
anyway i can say that i got more MPG and a little more power getting rid of my cat.....but o well
02-25-2009, 06:55 PM
#52
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Car: 1991 Formula Firebird
Engine: Pontiac 355 stroker (305 TBI 4Sale)
Transmission: Pending Manual , 700r4 for sale...
Axle/Gears: Stock... for now
Re: Delete cat to make exhaust louder?
Well, 90% of all of those things above are done to most any and all race car, so... what? Do Race cars not give off emissions? What's the difference between Emissions from 200 Race cars goin 100+mph in a circle or down a strip, and 200 street cars sitting on the interstate or 35mph in a Neighbourhood? See what I'm sayin'? Despite these stupid laws, the 'Ozone' or w-e is still "in danger"...
I think it's all BS, but... I have to conform to the Laws these crippled old men throw at us anyways... but, Evidently, if you're racing, you don't...
I think it's all BS, but... I have to conform to the Laws these crippled old men throw at us anyways... but, Evidently, if you're racing, you don't...
02-25-2009, 07:02 PM
#53
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Who is monitoring all the forums on the internet to look for any "illegal" activity?
How would TGO get "shut down"?
Im a member on hardcoresledder.com and so is IHI with the red firebird doing a wheelie in his sig, they talk obout everything on that site, even unregstered illegal firearms, and nothing has happened, so how could anything happen?
How would TGO get "shut down"?
Im a member on hardcoresledder.com and so is IHI with the red firebird doing a wheelie in his sig, they talk obout everything on that site, even unregstered illegal firearms, and nothing has happened, so how could anything happen?
02-25-2009, 07:06 PM
#54
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Eh, happens all the time. Just 
If you really want to start the flames, post something like, "I want to stroke my 305 to a torque-monster 335 and remove the cat and all that smog crap. Which synthetic oil should I use?" That'll get things hopping.
If you really want to start the flames, post something like, "I want to stroke my 305 to a torque-monster 335 and remove the cat and all that smog crap. Which synthetic oil should I use?" That'll get things hopping.
02-25-2009, 07:09 PM
#55
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Re: Delete cat to make exhaust louder?
02-25-2009, 10:40 PM
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Car: '82 Z28, T-Tops, White
Engine: 305 4bbl
Transmission: 4 speed manual
Axle/Gears: stock as a rock
Re: Delete cat to make exhaust louder?
From NYS DMV Brochure on Emissions inspection....
Some vehicles are exempt from the emissions inspection program: Your passenger car or light truck does not have to be inspected for emissions if it is:
So my '82 is exempt.....needs to pass safety only
Some vehicles are exempt from the emissions inspection program: Your passenger car or light truck does not have to be inspected for emissions if it is:
- Less than two model years old;
- 26 model years old or older;
- Registered with historical plates; or,
- Electric-powered only.
So my '82 is exempt.....needs to pass safety only
02-25-2009, 10:48 PM
#58
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Car: 87 GTA
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Re: Delete cat to make exhaust louder?
From NYS DMV Brochure on Emissions inspection....
Some vehicles are exempt from the emissions inspection program: Your passenger car or light truck does not have to be inspected for emissions if it is:
So my '82 is exempt.....needs to pass safety only
Some vehicles are exempt from the emissions inspection program: Your passenger car or light truck does not have to be inspected for emissions if it is:
- Less than two model years old;
- 26 model years old or older;
- Registered with historical plates; or,
- Electric-powered only.
So my '82 is exempt.....needs to pass safety only
Here in TX, I know we're exempt from TESTING, after 24 years, but it doesn't mean the stuff cam simply be removed. It still has to BE there, just no more sniffer test.
Or like me....I moved to a non-emissions test county.
02-25-2009, 10:54 PM
#59
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Car: 89 IROC-Z
Engine: 370 LSX, LS3 Top End
Transmission: Built T-56
Axle/Gears: 9" Aluminum Center 3.89's
Re: Delete cat to make exhaust louder?
Integrity, even if your car is not going to be checked, you should do whats right by keeping it environmently safe. They rely on your honesty to keep it clean.
02-25-2009, 10:55 PM
#60
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Car: '82 Z28, T-Tops, White
Engine: 305 4bbl
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Re: Delete cat to make exhaust louder?
there is no sniffer test in NY(there is in NY City, but not the rest of the state), they plug the computer into the OBDII socket, if you have a check engine light on, or all the monitors are not set, the vehicle fails.
And who is going to enforce these "Federal" emissions laws?
ive never heard of anybody getting a ticket citing any kind of Federal emissions law.
And who is going to enforce these "Federal" emissions laws?
ive never heard of anybody getting a ticket citing any kind of Federal emissions law.
02-25-2009, 11:02 PM
#61
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Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: Delete cat to make exhaust louder?
2 years ago was my last emissions test & they were scratching their heads & commenting how CLEAN my 20 yr old (emissions results) were.
02-25-2009, 11:14 PM
#62
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Re: Delete cat to make exhaust louder?
For example,you remove AIR, but still have a cat, and you test emmissions and pass the sniffer or whatever your good to go.
Cut the visual inspections, just take the readings from the tailpipe and if they're good, your good. Im confusing myself too lol
02-25-2009, 11:27 PM
#63
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Re: Delete cat to make exhaust louder?
But your right.....If the TRUE goal (not to raise revenues) is to get clean air.....Why even open the hood? Stick the sniffer in...Pass or Fail...Simple as that. It shouldn't matter if you have the "correct" engine & equipment, or a roots blown 572 big block sticking through the hood. As long as it passes...Put a sticker on the car...NEXT!
That's always been my biggest gripe about testing...The deetails of HOW you can pass.
I knew a guy once that had a single cat 3rd gen....He swapped to an OEM dual cat set-up. But it wasn't even available on his car (like a '85 or something.....wrong year).
Anyways.....
He passed the sniffer, but was denied the sticker, because of "illegal equipment".
So he went home, put the stock single cat back on, got retested.....
Sniffer #s went UP, but still under the limit.......
You guessed right. He got his sticker, even though his car was WORSE output!
Now THATS F'ed up! Pass people by making their car worse.......
BTW....When I got my car, the smog pump was totally disconnected. Not even a pulley on it. Still passed.
02-26-2009, 06:47 AM
#64
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Re: Delete cat to make exhaust louder?
As for the first few that replied initially, remember, simple and
straight to the point is usually the best way to avoid all out
flame wars.
~nough said.
02-26-2009, 01:15 PM
#65
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The very question, which you quoted, contains a statement which implies something that is incorrect. State emissions aren't the issue, Federal law is.
Setting the record straight does not a flame war make.
Setting the record straight does not a flame war make.
02-26-2009, 02:12 PM
#66
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Re: Delete cat to make exhaust louder?
Ok we have seen just about every kind of advocate for removing the pollution control equipment and every tree hugger is up in arms telling everyone that it will save the world by keeping all the emissions installed. Hmm!!! my exhaust consists of hookers 2210's to a mufflex y pipe to a 4 inch pipe w/ NO CAT'S to a spintech exhaust. It has no exhaust restrictions and no power loss. I only got 10mpg before and hasn't changed since the new engine.. So what about they synthethic oil anyway??? LOL.. I think we have beat this subject to death.
02-26-2009, 05:56 PM
#67
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Axle/Gears: 3.23 Auburn Pro Series LSD
Re: Delete cat to make exhaust louder?
OMG just lock this post LOL, his question has been anwsered, yes it will be louder
02-26-2009, 07:05 PM
#69
Supreme Member
Re: Delete cat to make exhaust louder?
actualy backpressure is nessicary on most stret cars to optimize efficincy, YOU WILL MAKE LESS POWER ON A OTHERWISE STOCK ENGINE IF YOU GO WITH STRAIT PIPES/ OPEN HEADERS.
now if your engine has an aftermarket cam with a tighter LSA and more duration, yes, it will help to relieve backpressure.
02-26-2009, 09:26 PM
#71
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Re: Delete cat to make exhaust louder?
Or Andy, he's the one that actually controls things around maybarry 
02-26-2009, 09:34 PM
#72
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Re: Delete cat to make exhaust louder?
Ok, I'm seriously going to make a sticky and close all cat threads from now on. This is getting ridiculous.
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