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04-03-2004, 10:49 PM
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#1
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Registered User
Join Date: Apr 2004
Posts: 33
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Illegal exhaust setup for emission tests
I currently have an offroad y pipe on my z28, but in NC they are cracking down on emissions testing for inspections. I was wondering if anyone had tried different setups to get pass the emissions tests and still have a basically functional offroad set up.
My understanding is that as long as u have 02 sims (your computer read that you have no errors) and they can see catylitic converters under your car then you will pass. This brings me to another question ANYONE TRIED GUTTING A CAT AND PUTTING IT ON THEIR CAR AND STILL PASSING INSPECTIONS WITH 02 SIMS?
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04-03-2004, 11:01 PM
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#2
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Registered User
Join Date: Sep 2002
Location: Marietta, Georgia
Posts: 357
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My car has gutted cats and it passes in GA. I have heard of some people just taking the heat sheild off of a cat and tack welding it in place for a visual inspection, Again I have heard this... sounds like it might work.
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1997 SS #1733 Ported This and Polished that.<----Sold
1998 Trans Am <----Sold
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04-03-2004, 11:45 PM
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#3
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Registered User
Join Date: Apr 2004
Posts: 33
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did you need 02 sims to pass?
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04-04-2004, 12:05 AM
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#4
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Registered User
Join Date: Sep 2002
Location: Marietta, Georgia
Posts: 357
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Yes I have the O2 sims programmed into the computer. N problems drove they scanned it and i was gone.
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1997 SS #1733 Ported This and Polished that.<----Sold
1998 Trans Am <----Sold
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04-04-2004, 12:18 AM
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#5
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Registered User
Join Date: Feb 2004
Location: Wildwood, MO
Posts: 594
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What I had done a while back was get the O2 simms and then I gutted the cats and stuck a straight through pipe through the middle of the cat. That way you don't get that echo or whatever because of that open chamber...thing....I passed.
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Quote:
Originally Posted by GUTTERbOY
I was a bit frightened at first, to think that something with that kind of girth had actually passed through my rectum.
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04-04-2004, 12:21 AM
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#6
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Registered User
Join Date: Sep 2002
Location: Marietta, Georgia
Posts: 357
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Good idea on the straigh through pipe mine has the echo wish I would have thought of that.
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1997 SS #1733 Ported This and Polished that.<----Sold
1998 Trans Am <----Sold
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04-05-2004, 02:17 AM
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#7
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Registered User
Join Date: Mar 2004
Location: Chicago
Posts: 351
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Is there a way to get your car exempt from emissions. I live in chicago IL and have heard that if your car is under a certain mileage a year or if it is a recreational vehicle you do not have to get it tested. how can someone with a 60s-70s built up muscle car take an emissions test ??
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98 Z/28 Bright Purple met. 1 of 95 / Comp Cam / LTs ORY - cutout / SLP SFCs - STB / Spohn LCAs / Nitto DRs / SSRA / Xdrilled-slotted rotors / NGK Plugs - MSD wires / Yank Converter
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04-05-2004, 09:39 AM
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#8
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Registered User
Join Date: May 2001
Location: Memphis, TN, USA
Posts: 3,034
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Yup .... what they said already.
If your car has to pass a visual inspection and they check for cats, gut a set of stockers and weld a pipe inside. I ran gutted cats and hated the sound of the extra "resonance chambers".
Since I didn't get any real gain at the track, I just stuck my stock cats back on and sold the gutted cats along with my O2 sims.
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04-05-2004, 09:40 PM
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#9
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Registered User
Join Date: Apr 2004
Posts: 33
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Thanx.. that helped alot.. since I already have a 3" offroad y pipe.. I think I might jus get some gutted cats and weld them on over top of the y pipe for the look. It would be the same concept as putting a pipe through the cats... tell me what you think?
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04-05-2004, 11:55 PM
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#10
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Registered User
Join Date: Jun 2003
Location: Caledon Ontario Canada
Posts: 1,104
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Quote:
Originally posted by gav'spurplez
Is there a way to get your car exempt from emissions. I live in chicago IL and have heard that if your car is under a certain mileage a year or if it is a recreational vehicle you do not have to get it tested. how can someone with a 60s-70s built up muscle car take an emissions test ??
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In ontario, if you fail the test, and then it is more than X number of dollars to make it pass, you get expempt. And im not too sure how chicago works but here if its older than 20 years or newer than 3 it doesnt need to be tested.
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95 z28 m6 - Performance: K&N cai, Walbro 255lph Racetronix pump, CC306 cam, ex612 springs, Pacesetter LT's, ORY, GMMG Chambered exhaust, 4.10 gears, Hurst shifter, MSD 6A box. Madz28 Tune. Umi: Adj phb, weld in sfc's, lca's
Appearance: Eibach prokit springs, 17x9.5 AT Italia wheels, '69 z28 emblems, tinted out, front plate delete, rear inserts, standard GMMG tips.
Check it out!
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04-06-2004, 12:43 AM
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#11
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Registered User
Join Date: Feb 2001
Location: Orlando, FL by UCF
Posts: 281
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So who thinks that in IL an LS1 with gutted cats and O2 simms will pass? All rest stock?
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04-06-2004, 03:45 PM
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#12
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Registered User
Join Date: Feb 2003
Location: Joliet IL
Posts: 951
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Quote:
Originally posted by 00LukeyWS6
So who thinks that in IL an LS1 with gutted cats and O2 simms will pass? All rest stock?
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In IL they have an OBDII emissions test. They hook up a scanner to your computer and if you are not throwong any codes....you pass! So put LTs and a cam in your car have it tuned and as long as the computer says your good, then your good.
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Cammed 99 Z M6 - 12.61@114 2.1 60' 374rwhp/381lbs tq untuned (Before Suspension mods) 224/224 .563/.563 TR Cam, Hooker Headers, Crapmaster Cat-back, BMR Adjustable Torque Arm, Koni Shocks, Strano Springs, Subframe Connectors, Panhard bar, LS7 Clutch
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04-07-2004, 02:36 AM
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#13
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Registered User
Join Date: Feb 2001
Location: Orlando, FL by UCF
Posts: 281
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Quote:
Originally posted by CrippleFightin
In IL they have an OBDII emissions test. They hook up a scanner to your computer and if you are not throwong any codes....you pass! So put LTs and a cam in your car have it tuned and as long as the computer says your good, then your good.
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Cool, gotta get new o2 sims though, both of mine went bad 
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04-07-2004, 03:31 PM
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#14
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Registered User
Join Date: Dec 2002
Location: Charlotte, NC
Posts: 764
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Quote:
Originally posted by gav'spurplez
Is there a way to get your car exempt from emissions. I live in chicago IL and have heard that if your car is under a certain mileage a year or if it is a recreational vehicle you do not have to get it tested. how can someone with a 60s-70s built up muscle car take an emissions test ??
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Like someone said above, if the car is 20-25 years old, you don't need to get tested for emissions (I forget if it's 20 or 25 years, here)
Also, you only have to pass what the requirements were, for THAT YEAR. As in, a car made in 1990, doesn't have to meat guidelines for cars made in 2000.
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04-07-2004, 06:52 PM
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#15
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Registered User
Join Date: Sep 2003
Location: Elk Grove Vlg, IL
Posts: 674
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In IL you can get a temporary if you spend over 450 dollars on repairs, but I would suspect that its only temporary.
Pre-69 cars are exempt.
__________________
94 z28
Mac mids and hi-flow cat to gmmg...
-Addicted
Der Wahnsinn ist nur eine schmale Brücke
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