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Old 09-21-2006, 02:52 PM   #1
Scooby Newbie
Member Sales Rating: (1)
Member#: 123988
Join Date: Aug 2006
Chapter/Region: SCIC
Location: half a lap ahead of you
2005 STI - Stg 2

Default Cobb Stage Two for 05 STI.

Just added this upgrade 3 days ago.

Cobb Turbo Back exhaust and access port. The exhaust went on first and holy cow what difference it made. The sound is unreal. This is my first "boxer" motor, and Im very impressed with how it sounds. No over the top like most cars you hear, but very throaty.

Then on Wednesday night i went into my garage and upgraded the ECU via the access port. Prior to doing this, i was completely freaked out. all of the paper work from Cobb says BE CAREFUL, YOU CAR COULD BECOME INOPERABLE. and even with zero mechanical skills, i went ahead with it.

It was cake. The access port does the whole thing. it only took about 30 mins or so. then is says "un plug, and go drive!". fair enough. i hit the streets of Santa Monica, Ca at 6pm. Bumper to bumper almost everywhere around my neighborhood. I got a few "half second, half third runs" but that was it. TOTALLY DIFFERENT! they said a HP gain of 45 and a Torque gain of 95 (i think). the car is unreal.

next thing on my list is getting rid of the STI wing. hate that shizzle. must go wingless.

anyone new to these fourms, and are looking for a nice set up. Not the only set up, but a solid one. Total out the door for everything 2K. worth every penny.
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Old 09-21-2006, 03:52 PM   #2
Scooby Specialist
Member Sales Rating: (11)
Member#: 109878
Join Date: Mar 2006
Chapter/Region: South East
Location: Cookeville, TN
2001 Aprilia RSVR


You people are killing me with all this stage two talk. I just need an AP now. Kinda got caught up in suspension at the moment. Anyway, congrats on the new setup.
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Old 09-21-2006, 03:56 PM   #3
Scooby Guru
Member Sales Rating: (21)
Member#: 23676
Join Date: Aug 2002
Chapter/Region: NESIC
Location: de_dust and Orgrimar


You are not nearly getting as much power from the AP as you may think. I mean you are getting gains obviously.. But get it protuned and you will see the real potential of engine management.

Say you gained 20whp from the ap, and 15-20 is about average.
You will very likely pick up another 20+whp, a lot of torque, and a LOT more low end/top end and much improved driveability on top of what you have already gained, from a protune. Just flashing the AP into your ecu there is very little chance you have picked up anywhere near 45hp 95 tq.
With a protune however, you should hit that hp number, but no way is EM gaining you 95 ft/lbs. Unless they meant for the entire stage 2 package. Which would be realistic, but really moreso with a protune.

Now what you need is to find a tuner who is comfortable tuning with alcohol injection, get yourself an alc inject setup, and be ready to pick up another 40whp/60ft/lbs (actually some tuners have made larger gains than that with it on a stage 2 car)

My old 05 STI with
TurboXS TBE with wrapped DP
APS cai
Samco inlet and maf elbow
SMC alch injection

Walked a couple basemapped 20G STIs. The top end was similar, and I had a good bit more low end. Then again, I was running 24PSI with that alch injection (you can do that with alch, its like running 107ish octane gas) so...

Last edited by Davenow; 09-21-2006 at 04:01 PM.
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