Torn between Crucial Racing shorty DP and Cobb high-flow DP

sandwi54 · 03-07-2006, 04:46 PM

Currently I have a stock gutted UP, helix catted DP mated to stock catback, and AP stage 2. However, I think I am only getting a barely better low-end torque than stock. When I accelerate from a stop to redline I could still feel a turbo lag as the car suddenly pulls much harder past 3k rpm.
Some people told me that the placement of the cat in the helix catted dp is not optimal because it's too close to the turbo. So I am thinking about getting either a cobb high-flow dp or a crucial racing dp mated to the stock 3rd cat. Which one would give me a better low-end response? Or is my lack of low-end a result of missing a 3" catback? I searched and searched but no one ever directly mentioned this topic (regarding the placement of the cat vs. low-end torque).

J-Rex2004 · 03-07-2006, 04:48 PM

Don't waste your money.

keaniegenie · 03-07-2006, 05:07 PM

Quote:

Originally Posted by sandwi54

Currently I have a helix catted dp mated to stock catback and AP stage 2. However, I think I am only getting a barely better low-end torque than stock. When I accelerate from a stop to redline I could still feel a turbo lag as the car suddenly pulls much harder past 3k rpm.
Some people told me that the placement of the cat in the helix catted dp is not optimal because it's too close to the turbo. So I am thinking about getting either a cobb high-flow dp or a crucial racing dp mated to the stock 3rd cat. Which one would give me a better low-end response? Or is my lack of low-end a result of missing a 3" catback? I searched and searched but no one ever directly mentioned this topic (regarding the placement of the cat vs. low-end torque).

The catback is part of it, but your uppipe is a large part of it too. Don't waste your money getting a better DP. Get an uppipe and a catback. There's a ton of other stuff that will help your bottom end performance you can add. Hell, a new catted dp is the cost of an uppipe plus install, depending on what you pay.

KingOfSiam · 03-07-2006, 05:10 PM

Both DP's will yield similiar gains, it's not worth it to buy a whole nother one.

CGM_WRX · 03-07-2006, 05:14 PM

Every catted JDM downpipe I have seen has the cat close to the turbo end. I am not sure if it has to do with emissions because they use a very expencive cat but I would like to know what the difference is.

I say spend your money on something else and keep the downpipe you have.

sandwi54 · 03-07-2006, 05:11 PM

Sorry I forgot to mention that I do have a stock gutted UP as well. So you guys think I should keep my helix catted DP and just get a catback?

dbrier · 03-07-2006, 06:14 PM

Keep the Helix.
Spend your money on a catback.

Spenk · 03-07-2006, 07:07 PM

Buy a good catback and get it pro tuned.

Money better spent.

nate49509 · 03-07-2006, 07:11 PM

I was kind of torn between the two, but then said screw it. I'm getting a Helix catted DP. Its the cheapest and seems to be great quality.

sandwi54 · 03-07-2006, 07:36 PM

Ok i think you guys have convinced me that cobb catted or crucial racing DP won't give more low-end torque than the helix catted. i'll go for a catback then.

nate49509 · 03-07-2006, 07:39 PM

The stock muffler is a major bottle neck in the system.

http://forums.nasioc.com/forums/show...=stock+muffler

03-07-2006, 04:46 PM	#1
sandwi54 Scooby Newbie Member#: 94532 Join Date: Aug 2005 Chapter/Region: BAIC Location: Bay Area Vehicle: 2005 WRX SRR Cobb Stage 2	Torn between Crucial Racing shorty DP and Cobb high-flow DP Currently I have a stock gutted UP, helix catted DP mated to stock catback, and AP stage 2. However, I think I am only getting a barely better low-end torque than stock. When I accelerate from a stop to redline I could still feel a turbo lag as the car suddenly pulls much harder past 3k rpm. Some people told me that the placement of the cat in the helix catted dp is not optimal because it's too close to the turbo. So I am thinking about getting either a cobb high-flow dp or a crucial racing dp mated to the stock 3rd cat. Which one would give me a better low-end response? Or is my lack of low-end a result of missing a 3" catback? I searched and searched but no one ever directly mentioned this topic (regarding the placement of the cat vs. low-end torque). Last edited by sandwi54; 03-07-2006 at 05:12 PM. Reason: Forgot to include the UP as a mod

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03-07-2006, 04:48 PM	#2
J-Rex2004 Scooby Specialist Member#: 68490 Join Date: Aug 2004 Chapter/Region: TXIC Location: Spring Vehicle: '04 tippin' on fo'fo jackstands.	Don't waste your money.

03-07-2006, 05:10 PM	#4
KingOfSiam Scooby Specialist Member#: 84636 Join Date: Apr 2005 Chapter/Region: South East Location: Atlanta Vehicle: 2005 WRX (automatic) Crystal Gray	Both DP's will yield similiar gains, it's not worth it to buy a whole nother one.

03-07-2006, 05:14 PM	#5
CGM_WRX Scooby Specialist Member#: 66280 Join Date: Jul 2004 Location: Boise, ID Vehicle: 2005 WRX Sedan Crystal Gray Metalic	Every catted JDM downpipe I have seen has the cat close to the turbo end. I am not sure if it has to do with emissions because they use a very expencive cat but I would like to know what the difference is. I say spend your money on something else and keep the downpipe you have.

03-07-2006, 05:11 PM	#6
sandwi54 Scooby Newbie Member#: 94532 Join Date: Aug 2005 Chapter/Region: BAIC Location: Bay Area Vehicle: 2005 WRX SRR Cobb Stage 2	Sorry I forgot to mention that I do have a stock gutted UP as well. So you guys think I should keep my helix catted DP and just get a catback?

03-07-2006, 06:14 PM	#7
dbrier Scooby Guru Member#: 6598 Join Date: May 2001 Chapter/Region: MWSOC Location: West side of Indianapolis Vehicle: 2012 Mazdaspeed3 Crystal White Pearl	Keep the Helix. Spend your money on a catback.

03-07-2006, 07:07 PM	#8
Spenk Scooby Guru Member#: 7164 Join Date: Jun 2001 Location: A World Of Noise Vehicle: ---> Spoiler alert: Everyone dies at the end.	Buy a good catback and get it pro tuned. Money better spent.

03-07-2006, 07:11 PM	#9
nate49509 Scooby Guru Member#: 22452 Join Date: Aug 2002 Chapter/Region: MWSOC Location: Not Flint. Vehicle: '04 WRX witty comment goes here	I was kind of torn between the two, but then said screw it. I'm getting a Helix catted DP. Its the cheapest and seems to be great quality.

03-07-2006, 07:36 PM	#10
sandwi54 Scooby Newbie Member#: 94532 Join Date: Aug 2005 Chapter/Region: BAIC Location: Bay Area Vehicle: 2005 WRX SRR Cobb Stage 2	Ok i think you guys have convinced me that cobb catted or crucial racing DP won't give more low-end torque than the helix catted. i'll go for a catback then.

03-07-2006, 07:39 PM	#11
nate49509 Scooby Guru Member#: 22452 Join Date: Aug 2002 Chapter/Region: MWSOC Location: Not Flint. Vehicle: '04 WRX witty comment goes here	The stock muffler is a major bottle neck in the system. http://forums.nasioc.com/forums/show...=stock+muffler