Emissions, Catted vs. None DP

Alaskan_awd · 12-18-2006, 12:00 AM

Hey guys, I want to go stage 2 before spring and I was wondering how many of you have catted or non catted DP's, have or havn't you had any problems with passing inspections, and what brand/type of DP do you have?

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AWDBST · 12-18-2006, 12:04 AM

Go catless. When the time comes swap the stock one back on. It will take like 30 mins every two years.

prometheum · 12-18-2006, 12:49 AM

gut the stock ones ftw

Alaskan_awd · 12-18-2006, 01:35 AM

Other then emissions a reason to stick to a catted dp seems to be that the 06's have boost creep problems and getting a catted dp helps prevent it.

AWDBST · 12-18-2006, 02:01 AM

Get engine management and port your wastegate. Problem solved.

02redwagone · 12-18-2006, 02:37 AM

Quote:

Originally Posted by prometheum

gut the stock ones ftw

x2 sleeper powah

Alaskan_awd · 12-18-2006, 03:07 AM

I've been searching like crazy on here and keep coming up with new stuff

. I would like to gut the stockers becuase that =$0.00, but from what I have read without 1 cat (and I would like it to be a high flow cat) I will likely get boost creep, yes I will have an AP when I change the DP but that is a bandaid and wont realy fix the problem (from what I have read), and I havnt done any research on it but having the wastegate ported doesnt sound very easy or cheap.

About the boost creep though, here is a quote taken from another post not sure how true it is, but interesting (I have a late model 06) "mostly found on early 06's and 05 sti's as it seems a batch of turbos were miss cast with an improper WG opening. Thats why some get creep and others dont."

So far it looks like the best option is a divorced wg full length catted DP.
The 06 exhaust is also different in the dp and midpipe are one piece, I could get a shorty dp but would have to use a midpipe section from an 02-05 wrx.

00Maddog · 12-18-2006, 03:58 AM

Quote:

Originally Posted by Alaskan_awd

The 06 exhaust is also different in the dp and midpipe are one piece, I could get a shorty dp but would have to use a midpipe section from an 02-05 wrx.

wrong, they look different buts that's it. all interchangeable. all downpipes are 2 piece, all the same except for 6mt's. all midpipes interchange, just different size resonators. all mufflers interchange. on wrx's anyhow.

MikeyMike · 12-18-2006, 01:27 PM

good thread. dumb question, but what is boost creep? i plan to go stage 2 very soon. i have heard of boost leaks.

Alaskan_awd · 12-18-2006, 01:38 PM

Quote:

Originally Posted by MikeyMike

good thread. dumb question, but what is boost creep? i plan to go stage 2 very soon. i have heard of boost leaks.

Everything you wanted to know about boost creep (it is new to me too) http://forums.nasioc.com/forums/showthread.php?t=477715

Mavrik · 12-18-2006, 01:42 PM

Keep in mind new vehicles are every four years now instead of two.

ponamy · 12-18-2006, 03:28 PM

Quote:

Originally Posted by Mavrik

Keep in mind new vehicles are every four years now instead of two.

thats 04 and up isnt it?

Alaskan_awd · 12-18-2006, 03:36 PM

I think its 06 and up, but maybe I missunderstood what he is saying.

Alaskan_awd · 12-18-2006, 03:51 PM

Quote:

Originally Posted by 00Maddog

wrong, they look different buts that's it. all interchangeable. all downpipes are 2 piece, all the same except for 6mt's. all midpipes interchange, just different size resonators. all mufflers interchange. on wrx's anyhow.

Taken from Unibombers Manifesto

Quote:

I have an 06+ WRX, is the downpipe the same? No. The 2006+ WRX has a unique exhaust in that it's downpipe is both the downpipe and midpipe sections of the "older" exhaust. This means you must use a "long" downpipe to bolt up to the rest of your exhaust system. A full TBE will fit fine, but when replacing just the downpipe, you must use a long downpipe. Check with your Vendor for other possible fitment issues prior to ordering.

Diagram is fo 02-05

Mavrik · 12-18-2006, 04:31 PM

2004 and newer have a four year extension.

Alaskan_awd · 12-18-2006, 05:03 PM

Quote:

Originally Posted by Mavrik

2004 and newer have a four year extension.

On the warrenty? I'm confused

Mavrik · 12-18-2006, 05:18 PM

Quote:

Originally Posted by Alaskan_awd

On the warrenty? I'm confused

on your IM check

Alaskan_awd · 12-18-2006, 05:24 PM

Quote:

Originally Posted by Mavrik

on your IM check

wow I feal smart.

MikeyMike · 12-18-2006, 07:41 PM

Quote:

Originally Posted by Alaskan_awd

Everything you wanted to know about boost creep (it is new to me too) http://forums.nasioc.com/forums/showthread.php?t=477715

Wow, thats great. thanks for linking that up. So, i have a slightly lesser chance of boost creep if i get a catted dp?

MikeyMike · 12-18-2006, 07:43 PM

Quote:

Originally Posted by Mavrik

Keep in mind new vehicles are every four years now instead of two.

Wow, where did you hear this? got it in black and white somewheres?

Alaskan_awd · 12-18-2006, 07:48 PM

Quote:

Originally Posted by MikeyMike

Wow, thats great. thanks for linking that up. So, i have a slightly lesser chance of boost creep if i get a catted dp?

It looks like it, at a loss of a few HP though.

Mavrik · 12-18-2006, 08:21 PM

Quote:

Originally Posted by MikeyMike

Wow, where did you hear this? got it in black and white somewheres?

Its been in writing for quite some time Mike, you might be able to get a copy from the DMV or something. I had an "un-offical" print out from office staff here about a year ago when it took effect.

MikeyMike · 12-18-2006, 09:51 PM

Well im sure its good news to all of us

Alaskan_awd · 12-26-2006, 04:01 AM

Bump, if I was to gut 1 stock cat, would that be enough flow for stage 2? If so, which should I gut, the first or last cat? Would there be any down falls to gutting one of the stock cats other then less flow, as apposed to getting a high-flow catted DP?

EvolvedAK · 12-26-2006, 04:10 AM

Quote:

Originally Posted by MikeyMike

Well im sure its good news to all of us

were so bad...were the cause of global warming

12-18-2006, 12:00 AM	#1
Alaskan_awd Scooby Specialist Member#: 117002 Join Date: Jun 2006 Chapter/Region: AKIC Location: Palmer, AK Vehicle: 2010 >40psi, oh yes! POWERSTROKE	Emissions, Catted vs. None DP Hey guys, I want to go stage 2 before spring and I was wondering how many of you have catted or non catted DP's, have or havn't you had any problems with passing inspections, and what brand/type of DP do you have? * Registered users of the site do not see these ads.

12-18-2006, 03:36 PM	#13
Alaskan_awd Scooby Specialist Member#: 117002 Join Date: Jun 2006 Chapter/Region: AKIC Location: Palmer, AK Vehicle: 2010 >40psi, oh yes! POWERSTROKE	I think its 06 and up, but maybe I missunderstood what he is saying. Last edited by Alaskan_awd; 12-18-2006 at 03:55 PM.

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12-18-2006, 12:04 AM	#2
AWDBST Scooby Newbie Member#: 80085 Join Date: Jan 2005 Chapter/Region: AKIC Location: Anchorage Vehicle: 11.8 117 Trap Stock EJ205	Go catless. When the time comes swap the stock one back on. It will take like 30 mins every two years.

12-18-2006, 12:49 AM	#3
prometheum NASIOC Supporter Member#: 92003 Join Date: Jul 2005 Chapter/Region: South East Location: Tatooine Vehicle: 04 TDI Passat	gut the stock ones ftw

12-18-2006, 01:35 AM	#4
Alaskan_awd Scooby Specialist Member#: 117002 Join Date: Jun 2006 Chapter/Region: AKIC Location: Palmer, AK Vehicle: 2010 >40psi, oh yes! POWERSTROKE	Other then emissions a reason to stick to a catted dp seems to be that the 06's have boost creep problems and getting a catted dp helps prevent it.

12-18-2006, 02:01 AM	#5
AWDBST Scooby Newbie Member#: 80085 Join Date: Jan 2005 Chapter/Region: AKIC Location: Anchorage Vehicle: 11.8 117 Trap Stock EJ205	Get engine management and port your wastegate. Problem solved.

12-18-2006, 03:07 AM	#7
Alaskan_awd Scooby Specialist Member#: 117002 Join Date: Jun 2006 Chapter/Region: AKIC Location: Palmer, AK Vehicle: 2010 >40psi, oh yes! POWERSTROKE	I've been searching like crazy on here and keep coming up with new stuff . I would like to gut the stockers becuase that =$0.00, but from what I have read without 1 cat (and I would like it to be a high flow cat) I will likely get boost creep, yes I will have an AP when I change the DP but that is a bandaid and wont realy fix the problem (from what I have read), and I havnt done any research on it but having the wastegate ported doesnt sound very easy or cheap. About the boost creep though, here is a quote taken from another post not sure how true it is, but interesting (I have a late model 06) "mostly found on early 06's and 05 sti's as it seems a batch of turbos were miss cast with an improper WG opening. Thats why some get creep and others dont." So far it looks like the best option is a divorced wg full length catted DP. The 06 exhaust is also different in the dp and midpipe are one piece, I could get a shorty dp but would have to use a midpipe section from an 02-05 wrx.

12-18-2006, 01:27 PM	#9
MikeyMike Scooby Specialist Member#: 112401 Join Date: Apr 2006 Chapter/Region: AKIC Location: Avon Lake, OH Vehicle: 2012 Chevy Cruze Eco Turbo	good thread. dumb question, but what is boost creep? i plan to go stage 2 very soon. i have heard of boost leaks.

12-18-2006, 01:42 PM	#11
Mavrik Scooby Guru Member#: 90347 Join Date: Jul 2005 Chapter/Region: AKIC Location: Anchorage AK Vehicle: 2013 BRZ & Imp 2.5RS Yamaha FZ8	Keep in mind new vehicles are every four years now instead of two.

12-18-2006, 04:31 PM	#15
Mavrik Scooby Guru Member#: 90347 Join Date: Jul 2005 Chapter/Region: AKIC Location: Anchorage AK Vehicle: 2013 BRZ & Imp 2.5RS Yamaha FZ8	2004 and newer have a four year extension.

12-18-2006, 09:51 PM	#23
MikeyMike Scooby Specialist Member#: 112401 Join Date: Apr 2006 Chapter/Region: AKIC Location: Avon Lake, OH Vehicle: 2012 Chevy Cruze Eco Turbo	Well im sure its good news to all of us

12-26-2006, 04:01 AM	#24
Alaskan_awd Scooby Specialist Member#: 117002 Join Date: Jun 2006 Chapter/Region: AKIC Location: Palmer, AK Vehicle: 2010 >40psi, oh yes! POWERSTROKE	Bump, if I was to gut 1 stock cat, would that be enough flow for stage 2? If so, which should I gut, the first or last cat? Would there be any down falls to gutting one of the stock cats other then less flow, as apposed to getting a high-flow catted DP?