Catalytic converter?

[AndrewD5418]

Just ran through emissions without one, along with without an EGR Valve. It's the way I bought the car. I can either get a high flow cat and a test pipe, and put the EGR valve on, But would that make my car pass? HC at idle was 2000.0, limit is 220.0. CO was 1.29, limit is 1.20. I'm not looking to spend huge ####ing bucks just to make it pass. It's either that, or I could just re-register it up north more, use my friends house address, and his county as he does not have emissions.

It's also got a pair of 272/272 cams... .. Bought it this way,

But I'm wondering how much does a cat really do? Would it bring it down enough?

 

[VtecvrsTurbo]

A cat will trap and regulate the "BAD" gases. Clearly you need one and it will help. Sucks for you, I have no cat and mine passed with flying colors. Mabye I was holding the exhaust meter about 2 feet away for the tailpipe but it passed. Odds are if you put a high flow on, and the egr back on it MIGHT pass. Some do and dont. It just depends. Id say grab a 40 dollar universial cat and have some one bend you up something that bolts to your downpipe and a section of your cat back. Good luck. Oh and thiose cams aint helping you at all.

 

[AndrewD5418]

A cat will trap and regulate the "BAD" gases. Clearly you need one and it will help. Sucks for you, I have no cat and mine passed with flying colors. Mabye I was holding the exhaust meter about 2 feet away for the tailpipe but it passed. Odds are if you put a high flow on, and the egr back on it MIGHT pass. Some do and dont. It just depends. Id say grab a 40 dollar universial cat and have some one bend you up something that bolts to your downpipe and a section of your cat back. Good luck. Oh and thiose cams aint helping you at all.

I know the cams arnt helping at all. Too much shit to do just to replace put the stocks back in (He gave me the stocks). Thats why I'm thinking of just registering it at my friends address, but I'm not sure HOW I would do that, as I would have to wait for the renewal thing? Can you renew it after it fails? I am wondering though, how much an EGR valve and a cat would do. How about running some sure pass through it? Anybody know if that junk helps? How about new plugs, wires, and a O2 sensor? I've recently run seafoam through it about 2 weeks ago through the vacume, but not the gas tank.

 

[nightspeed87]

do those cams make it feel faster at least ? Well id throw a stock cat back on but leave a flange where you can drop it down after emissions and put a test pipe up there, and something thats worked for me in my old car i used to pour rubbing acohol down into the gas tank , like a whole bottle and it helped it to pass some how... I dont have a egr anymore.

 

[nightspeed87]

But that was when i still had a cat on my car also..... but that was when i was up north, i live in florida and we dont have emissions testing here at all .

 

[AndrewD5418]

do those cams make it feel faster at least ? Well id throw a stock cat back on but leave a flange where you can drop it down after emissions and put a test pipe up there, and something thats worked for me in my old car i used to pour rubbing acohol down into the gas tank , like a whole bottle and it helped it to pass some how... I dont have a egr anymore.

More or less. It feels faster, but feels like there's less boost.. . It's one screwed up combo, I know, and not many like it. But in the future it's gonna have an EVOIII 16G. But I know it's a decent condition car, because it was a project for MATC, a sorta big college in wisconsin for this type of stuff. And who can complain for 4,200 dollars for a near stock 91, with only two aftermarket parts, with a rebuilt motor?

No emissions in florida??? That is REALLY ####ed up... You guys produce more smog then Wisconsin! BTW, how did you do the alcohol thing? You didn't run the car WITH the alcohol in it, did you?

I was thinking of converting to a 2.5 exhaust though, I sorta and sorta dont like the look/sound of my coffee can apex n1 turboback =/. Kinda loud. And 2.5 should be able to handle 300ish HP sufficiently?

 

[xveganxcowboyx]

If you dump the exhaust, let me know

The cat is probably the most important part to help you pass. I forget all the details of how it effects emissions tests, but I wouldn't think the EGR would be crucial. The cams can't help.

How many shots do you get at emissions testing? I've never had to do it so I don't know. If you can try a few times I would start with the cat as it will be the easiest and most effective component to change.

 

[AndrewD5418]

If you dump the exhaust, let me know

The cat is probably the most important part to help you pass. I forget all the details of how it effects emissions tests, but I wouldn't think the EGR would be crucial. The cams can't help.

How many shots do you get at emissions testing? I've never had to do it so I don't know. If you can try a few times I would start with the cat as it will be the easiest and most effective component to change.

I belive we get three tries. And even then if it CONTINUES to fail you can get a waiver. Regular cat's stop more pollution than high flow, right?

 

[xveganxcowboyx]

Yes, I imagine they do. In the very least, they probably heat up faster. If you plan on continuing to run a cat I would get a nice high flow and bolt it in (it will help tone down that loud exhaust as well). If you just plan on passing and ripping it right off, just grab a stock one from somebody and have it bolted up.

Personally, I recomend going with the high flow. I don't want to be breathing your nasty exhaust.

 

[AndrewD5418]

Yes, I imagine they do. In the very least, they probably heat up faster. If you plan on continuing to run a cat I would get a nice high flow and bolt it in (it will help tone down that loud exhaust as well). If you just plan on passing and ripping it right off, just grab a stock one from somebody and have it bolted up.

Personally, I recomend going with the high flow. I don't want to be breathing your nasty exhaust.

Meh, The earth takes care of it's self. No global warming either. They never count how many icebergs go up / how much some grow. They only talk about "melting". There's also some stuff that lives off of Carbon Monoxide, etc. And oil? I highly doubt there were that many dinosaurs to last us this long.... so it's probably a byproduct from the earth .

Maybe have three things, test pipe, regular cat, and a high flow. Regular for emissions, test/high flow for whatever I feel like.

 

[xveganxcowboyx]

Maybe have three things, test pipe, regular cat, and a high flow. Regular for emissions, test/high flow for whatever I feel like.

It's your money. Persoanlly, I'd run the high flow daily. If you need power for the track just unbolt everything after the down-pipe.

 

[president95]

If you just go get a stock cat, you'll most likely pass.

 

[AndrewD5418]

If you just go get a stock cat, you'll most likely pass.

I'm assuming I'd have to obtain one from the dealership? Or where can I get a stock one? Certainly not a junk yard?

 

[RyanJ]

the junkyard is always worth a try. You might be able to find a dsm with a stock cat, and boom youre in buisness.

 

[AndrewD5418]

the junkyard is always worth a try. You might be able to find a dsm with a stock cat, and boom youre in buisness.

Well I've decided Im' just gonna get rid of the N1 probbably. I'm looking for a real good sounding 2.5 for a 1g.. Maybe some sound clips or something? 2.5 also gives you more torque right?

 

[xveganxcowboyx]

2.5 also gives you more torque right?

No.

I think this is where I recomend you reading all the stickies and FAQ's.

And I agree.

 

[AndrewD5418]

No.

I think this is where I recomend you reading all the stickies and FAQ's.

And I agree.

... Or not..... Because I see no stickies and the FAQ's/techguides are mostly how to's... Just looking for answers not "go read this and this and this... and this.." I think I've decided on the 2.5 VRS though. Can't be as loud as that 3" n1. Too many exhausts to look at =/

BTW, it doesnt?

But wait, there's a problem....Having a huge exhaust pipe has killed my low end torque!!! What's different? Oh, there's no backpressure!! Therefore backpressure makes torque!

http://www.dsmtuners.com/forums/showthread.php?t=168578

 

[RyanJ]

Thats a cool link you put up there, but wait that says scavenging makes torque not backpressure. HUH? weird. And way to quote something totally out of context since the next word after that quote is WRONG.

 

[AndrewD5418]

Thats a cool link you put up there, but wait that says scavenging makes torque not backpressure. HUH? weird. And way to quote something totally out of context since the next word after that quote is WRONG.

sized correctly for your application.

Meaning, a 2.5 would be sufficient for my 300hp that I want.

 

[CruisinGSX]

If you're looking to make 300hp at the wheels, then yes, a 2.5" exhaust will suffice. Anything over 350hp, I would recommend getting a full 3" turbo-back. I just got my 3" turbo-back from Buschur Racing, and I LOVE it!!! You would usually expect it to be loud as hell, but actually it's quite passive, and it opens up really well under WOT conditions. No ricer sound at all!!! If you want a really good exhaust, I would recommend getting the Buschur piece.
Also, about the emissions thing... just get an aftermarket Buschur 2.5 or 3" cat (depending on what exhaust size you choose), and you should do just fine. Catalytic converters are the most important link in the emissions point of view, so it should take care of all your problems. Just bolt it on when you have your emissions test coming up, then put a test pipe in its place and put the cat in storage until next year when your next emissions test is due. Problem solved!

Hope this helps ya out

 

[AndrewD5418]

What are your plans for your car? Will you be happy with 300-350 hp at the wheels? If so, then you can go with a 2.5" exhaust. Anything more and I would recommend getting a full 3" turbo-back. I just got my 3" turbo-back from Buschur Racing, and I LOVE it!!! You would usually expect it to be loud as hell, but actually it's quite passive, and it opens up really well under WOT conditions. No ricer sound at all!!! If you want a really good exhaust, I would recommend getting the Buschur piece.
Also, about the emissions thing... just get an aftermarket Buschur 2.5 or 3" cat (depending on what exhaust size you choose), and you should do just fine. Catalytic converters are the most important link in the emissions point of view, so it should take care of all your problems. Just bolt it on when you have your emissions test coming up, then put a test pipe in its place and put the cat in storage until next year when your next emissions test is due. Problem solved!

Hope this helps ya out

If you don't mind can I have a clip of your bushcar? I'd like to compare it to my... bleah.. apexi..

 

[CruisinGSX]

If you don't mind can I have a clip of your bushcar? I'd like to compare it to my... bleah.. apexi..

Actually, you just reminded me that I never actually took pictures of my exhaust yet!!! Yeah, tell ya what... I'm gonna run out real quick and clean my tip, then take a few pics!!! Be right back!!!

 

[RyanJ]

Sorry not to be dick. I just get frustrated when people say backpressure leads to low end because it is scavenging not backpressure. I didn't mean to say that 2.5" wouldn't work for your application.

 

[CruisinGSX]

Alrighty, my pics turned out crappy, considering it's almost 2am here in PA, so hopefully I can get my 2 clips uploaded to my server....

Hold a sec, and I'll give ya the links... ahhh, there we go! Hope you can hear it alright.

At Idle

Rev to 5k

It sounds awesome under load at WOT!!! (I'm just too lazy to go out driving right now and get another clip...)

 

[AndrewD5418]

Sorry not to be dick. I just get frustrated when people say backpressure leads to low end because it is scavenging not backpressure. I didn't mean to say that 2.5" wouldn't work for your application.

But what would a 3" do compared to a 2.5 if you just have 300-350HP? It can't improve it that much, can it?