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Old 01-11-2010, 11:54 AM   #1
writersblock
Scooby Newbie
 
Member#: 28912
Join Date: Nov 2002
Chapter/Region: South East
Location: Charlotte, NC
Vehicle:
2002 WRX
Platinum Silver

Default Cobb Accessport V2 Stage 1

So I heard a lot of people saying that Stage 1 made very little difference on their otherwise stock cars and should be installed only if planning down the road to go with Stage 2. I have a 2002 WRX with very light mods: Grimmspeed Uppipe, Perrin Crank Pulley, STI timing belt, Exedy Clutch and stock flywheel, Group N Pitch Stop, engine mounts and tranny mount.

Here are my observations:
Boost is much more linear and stronger. It pulls nearly immediately to 15 PSI and stays there through about 5,000 rpms when the turbo runs out of efficiency. Fourth and fifth gear pulls are awesome.

It idles and runs much better in general.

I did some street pulls using Dynolicious on my iPhone and it shows as promised, an additional 40 horsepower (260 at the crank with a 25% drivetrain loss). Looking at my datalogs, it shows a maximum boost of 15.52 PSI with an A/F of 11.27, which seems rich, and 85% duty cycle on the injectors.

Overall, I'm very pleased with the results and am looking forward to going to Stage II.
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Old 01-11-2010, 12:23 PM   #2
blk05wrx
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Member#: 180559
Join Date: May 2008
Chapter/Region: MWSOC
Location: Arlington Heights, IL
Vehicle:
2005 WRX Cobb Stg 2
Black

Default

I noticed a big difference with Stage 1. Stage 2 was even better. Now I'm used to it, and want more.
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Old 01-15-2010, 01:42 AM   #3
knockinnoma
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Member#: 235296
Join Date: Jan 2010
Default

did you loose and bottom end power with the stage 2?
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Old 01-15-2010, 08:32 PM   #4
contour se driver
Scooby Newbie
 
Member#: 24874
Join Date: Sep 2002
Chapter/Region: NWIC
Location: Mukilteo
Vehicle:
07 Legacy GT
faster paint scheme

Default

Quote:
Originally Posted by writersblock View Post
So I heard a lot of people saying that Stage 1 made very little difference on their otherwise stock cars and should be installed only if planning down the road to go with Stage 2. I have a 2002 WRX with very light mods: Grimmspeed Uppipe, Perrin Crank Pulley, STI timing belt, Exedy Clutch and stock flywheel, Group N Pitch Stop, engine mounts and tranny mount.

Here are my observations:
Boost is much more linear and stronger. It pulls nearly immediately to 15 PSI and stays there through about 5,000 rpms when the turbo runs out of efficiency. Fourth and fifth gear pulls are awesome.

It idles and runs much better in general.

I did some street pulls using Dynolicious on my iPhone and it shows as promised, an additional 40 horsepower (260 at the crank with a 25% drivetrain loss). Looking at my datalogs, it shows a maximum boost of 15.52 PSI with an A/F of 11.27, which seems rich, and 85% duty cycle on the injectors.

Overall, I'm very pleased with the results and am looking forward to going to Stage II.
my stage 1 hits 16 sometimes 16.5 tapering down to a very strong 13. it may say 13 but pulls like its more.

thats on a 5eat for over 25k miles now.

fwiw 260 is pretty much stock. the gt's were under rated.
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Old 01-15-2010, 08:33 PM   #5
contour se driver
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Member#: 24874
Join Date: Sep 2002
Chapter/Region: NWIC
Location: Mukilteo
Vehicle:
07 Legacy GT
faster paint scheme

Default

Quote:
Originally Posted by knockinnoma View Post
did you loose and bottom end power with the stage 2?

what?

there is no loss going stage 2. only gains. from bottom to top.
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Old 01-19-2010, 08:21 PM   #6
BlackPooL
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Member#: 107344
Join Date: Feb 2006
Chapter/Region: W. Canada
Location: Winnipeg, MB, Canada
Vehicle:
2002 WRX Sedan
Sedona Red Pearl

Default

Quote:
Originally Posted by contour se driver View Post
my stage 1 hits 16 sometimes 16.5 tapering down to a very strong 13. it may say 13 but pulls like its more.

thats on a 5eat for over 25k miles now.

fwiw 260 is pretty much stock. the gt's were under rated.

2002 WRX is 227HP stock. Not the same as your 2.5 L-GT.

WritersBlock, your numbers sound damn near bang on to what my 2002 WRX posts with Stage 1.

11.27 AF, 15.6PSI, though my duty cycle gets up near 95%, however I am having slight power delivery issues and the weather here is pretty cold so that could be why. Colder, denser air = more fuel?
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Old 01-21-2010, 07:04 PM   #7
beedee
Scooby Specialist
 
Member#: 124727
Join Date: Sep 2006
Chapter/Region: SCIC
Location: Long Beach, CA
Default

Quote:
Originally Posted by writersblock View Post
So I heard a lot of people saying that Stage 1 made very little difference on their otherwise stock cars and should be installed only if planning down the road to go with Stage 2. I have a 2002 WRX with very light mods: Grimmspeed Uppipe, Perrin Crank Pulley, STI timing belt, Exedy Clutch and stock flywheel, Group N Pitch Stop, engine mounts and tranny mount.

Here are my observations:
Boost is much more linear and stronger. It pulls nearly immediately to 15 PSI and stays there through about 5,000 rpms when the turbo runs out of efficiency. Fourth and fifth gear pulls are awesome.

It idles and runs much better in general.

I did some street pulls using Dynolicious on my iPhone and it shows as promised, an additional 40 horsepower (260 at the crank with a 25% drivetrain loss). Looking at my datalogs, it shows a maximum boost of 15.52 PSI with an A/F of 11.27, which seems rich, and 85% duty cycle on the injectors.

Overall, I'm very pleased with the results and am looking forward to going to Stage II.
that 40 hp seems pretty ambitious to me...
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Old 02-16-2010, 03:32 AM   #8
jdmjeb
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Member#: 238534
Join Date: Feb 2010
Chapter/Region: NWIC
Location: Spokane
Vehicle:
2002 Bugeye
Aspen White

Default

I have an 03 wrx with similiar mods. I have the stage 2 map running and have had my stock injectors hit their duty cycle at around 6000. Not cool..
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Old 02-18-2010, 09:23 PM   #9
selintung
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Member#: 221086
Join Date: Aug 2009
Location: Richmond, VA
Vehicle:
2008 STi
Silver

Default

what is the duty cycle and how do you measure it?
anyone know if the cobb CBE is available for 08 STi?
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