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Old 01-21-2003, 10:58 PM   #1
SoLiDbReAkZ
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Default Hi flow cats & emissions sniffer test in NJ..

The Perrin 3" downpipe with the cat has peaked my interest. I'm worried about how my car would fare when it goes in for inspection next January. I'm not worried about visual inspection, as I intend on bringing the car to a local private shop that my family has been dealing with for over 25 years. The problem is the sniffer test. These guys are dead honest when it comes to performing and logging emissions diagnostics. I've failed the sniffer before there (w/ a previous car) and I had to reinstall my stock exhaust in order to pass again.

I already have a GReddy catback on the car. I've ordered a JDM catless uppipe, I/C hoses, and intend on getting a ECUtek reflash in the near future. I've heard good things regarding hp increases with aftermarket dp's, and I like the idea of one with a hi flow catalytic converter. On the other hand, I have no idea how competent a "hi-flow" aftermarket cat will be at performing the same function as well as the two post-turbo stock cats.

Mind you also, I'm going to be working full-time and going to law school at night, so I most likely will not have copious amounts of free time to crawl under my car and swap pipes come inspection time.

Your thoughts??
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Old 01-21-2003, 11:10 PM   #2
fengshui-fu
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whats up man? Im getting the Perrin UP and the same DP you are considering put in this weekend, hopefully. I have wondered about the same thing, but the inspection folks shouldnt care as long as they see ONE cat under your car, which they should with the HF cat in the perrin DP. As far as passing goes, I dont think itll be a problem.

chris
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Old 01-21-2003, 11:33 PM   #3
2MANYCARS
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Chris the honest guy, hee hee. I am not too sure about the one cat solution on the downpipe. If you still have your stock downpipe and the third cat in your house, I suggest you to find sometime to install them. Did you say next January? You still have a year to go man, don't worry too much.
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Old 01-22-2003, 05:09 PM   #4
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alright..but all I am really asking is how well a single "hi-flow" cat will compare in its capability of reducing emitted toxins, to the two stock midpipe/dp cats?

Is a hi-flow cat just a gimmick? I mean, I care somewhat for the enviroment here. If I find out that a hi-flow doesn't perform nearly as well as each stock cat, the I'm not gonna get the dp.

Anyone have any information on "hi-flow" catalytic converters?
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Old 01-22-2003, 10:36 PM   #5
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I've seen highflow cats before they go into an exhaust and to me I can see why they claim to flow more air, and the other thing is that they tend to have a larger opening too.

And anyway we have awd cars.....All they can do is put the sniffer in the tail pipe and rev the engine. I can't see the car failing if it has at least a portion of the emissions system still in place.
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Old 01-23-2003, 12:25 AM   #6
SoLiDbReAkZ
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Quote:
Originally posted by jesse370
And anyway we have awd cars.....All they can do is put the sniffer in the tail pipe and rev the engine. I can't see the car failing if it has at least a portion of the emissions system still in place.

...even when there is only one catalytic converter remaining, in a system that originally called for three?...

How about that Guaranteed 2 Pass crap. Would THAT help at all?
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Old 01-23-2003, 11:18 AM   #7
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Quote:
Originally posted by SoLiDbReAkZ



...even when there is only one catalytic converter remaining, in a system that originally called for three?...

How about that Guaranteed 2 Pass crap. Would THAT help at all?
The three were really there for CA more than anything.
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Old 01-23-2003, 11:54 AM   #8
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So basically its safe to say that my car would safely pass the emissions sniffer test with only ONE "hi-flow" catalytic converter?

Last edited by SoLiDbReAkZ; 01-23-2003 at 12:28 PM.
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Old 01-24-2003, 02:36 AM   #9
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bump
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Old 01-24-2003, 11:37 AM   #10
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anyone else??


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Old 01-24-2003, 03:56 PM   #11
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i love how theres 9 posts in here but not one answers your question... nasioc is great.


anyways SoLiDbReAkZ, the best thing to do in my opinion is, go get sniffed with your single high flow cat. if it fails, you have 45 days to put the stock exhaust on (no big deal) and go for a retest. my advice though is to take off the greddy muffler and put the STOCK muffler back. from what i hear, any aftermarket muffler will fail.

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Old 01-24-2003, 11:08 PM   #12
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Not necessarily. When I had my Accord coupe, I had a Greddy EVO exhaust on it and a DC Sports 4-2-1 header and passed inspection without any problems. So the assumption that they will fail you just because you have an aftermarket exhaust is not necessarily true. I would just take it in and see if you pass. If you don't, then just go to a local shop and "tip" the guy really well.

Calvin
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Old 01-25-2003, 02:20 AM   #13
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I AM talking abouta local shop. I failed the sniffer with a previous car utilizing a high-flow cat.....I WAS running considerably rich though

We'll have to see...I'mall for taking the plunge...just as long as my environmentalist girlfriend doesn't find out
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Old 01-25-2003, 01:48 PM   #14
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Calvin, i know they used to allow aftermarket exhausts as long as they passed teh sniffer test. but recently, as in just started enforcing it, i've heard that you need to have the stock muffler in place (just the rear section)
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Old 01-25-2003, 01:55 PM   #15
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How much is the Perrin DP with cat?
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Old 01-25-2003, 02:21 PM   #16
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About $569 from Nino.....that price INCLUDES gaskets.
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Old 01-25-2003, 06:02 PM   #17
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Quote:
Originally posted by ants wrx
Calvin, i know they used to allow aftermarket exhausts as long as they passed teh sniffer test. but recently, as in just started enforcing it, i've heard that you need to have the stock muffler in place (just the rear section)
Yet another reason to hate NJ if this is true. Hopefully someone that gets inspected soon will be able to tell us for sure what the situation is like now.

Calvin
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Old 01-26-2003, 11:58 AM   #18
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Couldnt you put an MBC on in like 5 min. drive to take you test with it running a bit lean? then let them test it?

chris
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Old 01-26-2003, 12:20 PM   #19
SoLiDbReAkZ
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Can some one just stick the sniffer to the pipe and run a test for us....or does every test HAVE to be logged and transmitted to Trenton?

I mean, Chris...you're getting both the up and down installed. If a guy is willing to do a test (obviously not counted) to see how it fares...wanna split the cost?
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Old 01-28-2003, 01:48 PM   #20
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Can a sniffer be donw without having to send the results to the state?
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Old 01-28-2003, 05:10 PM   #21
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WILL SOMEONE PLEASE JUST ANSWER THE QUESTION?? =D
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Old 01-29-2003, 02:00 PM   #22
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yeah..does ANYONE know??
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Old 01-30-2003, 02:14 AM   #23
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hmm..I guess not.
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Old 01-30-2003, 02:20 AM   #24
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Quote:
Originally posted by cnk


Yet another reason to hate NJ if this is true. Hopefully someone that gets inspected soon will be able to tell us for sure what the situation is like now.

Calvin
I used to work doing inspection, they started with the muffler after i quit, they are failing anything that doesn't have the stock muffler (my friend that still works there told me) i think the reason for this was because they couldn't fail people for loud exhaust because they didn't use a DB meter
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Old 01-30-2003, 02:26 AM   #25
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Quote:
Originally posted by SoLiDbReAkZ
Can a sniffer be donw without having to send the results to the state?
At DMV it can be done, at a gas staton or something i am not sure about
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