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Old 09-22-2010, 01:56 PM   #1
paul@YimiSport.com
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Member#: 129072
Join Date: Oct 2006
Chapter/Region: SCIC
Location: Santa Clarita, CA
Vehicle:
2008 WRX STi
Laguna Seca Blue

Default A tale of two 2011 STI's: 300whp/350wtq. YimiSport Tuned

Location:Yimi Sport Tuning, Santa Clarita, CA
Ambient Temp: 65*F
Elevation: 1200ft ASL

Car 1: 2011 Subaru WRX STI
Tuner: Paul Leung
Dyno Info: DynoJet
Peak HP at RPM: 300 whp @ 4800 rpm
Peak TQ at RPM: 354 wtq @ 3600 rpm
Baseline HP for a stock car: 253 whp
Target Boost: 19 psi tapering to 13.5 psi
Target AFR: 11.1:1
Fuel: CA 91 octane

Car 2: 2011 Subaru WRX STI
Tuner: Paul Leung
Dyno Info: DynoJet
Peak HP at RPM: 300 whp @ 5000 rpm
Peak TQ at RPM: 351 wtq @ 3600 rpm
Baseline HP for a stock car: 253 whp
Target Boost: 19 psi tapering to 13.5 psi
Target AFR: 11.1:1
Fuel: CA 91 octane

We were fortunate enough to have not 1 but 2 very early 2011 STI's come to us a couple of weeks ago. One belonged to a customer who had a 2007 STI that we tuned a couple of years ago that he traded for a SWP 2011 STI sedan and the other to a gentleman who is brand new to the Subaru family. We installed a combo of parts on both cars that we love on all the 08+ STI's and now refer to as "The Recipe" . Here are the ingredients:

Cobb AP V2
Invidia catless downpipe
Tomei equal length header/uppipe
AEM cold air intake
Grimmspeed ECBS
Stock catback

The above combo of parts have proven to be a very effective and consistent setup. With the stock catback still in place the cars are truly "silent but deadly"

On to the graphs. First a baseline pull from the first car:



While the factory tune is still far from optimal, it does seem to be significantly improved from the earlier GR body STI's. The closed loop to open loop transition is shorter and doesn't force the car to run at 14.7:1 AFR while under full boost (unlike the earlier cars). As such it no longer threatens to blow itself up at any given time Regardless, there is plenty of potential to extract power, so after installing the aforementioned parts it was time to strap the car back on the dyno and get to tuning. Special thanks to Tim Bailey from Cobb Tuning Surgeline for getting me an advance beta copy of AccessTuner Pro that supports the 2011's.

After a few pulls here was the result of car #1:


Now overlayed with the stock baseline:


Now on to car #2. As you can see the parts combo and tune are pretty consistent


We didn't baseline this car due to time constraints, but here is the tuned graph overlayed with the baseline from car #1:


Both gentlemen are very pleased with their cars. We will actually have some upgraded turbo data on car #1 as the owner is already salivating for more power, so it will be receiving our SS450 turbo, injectors and meth next week, so stay tuned...
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Old 09-22-2010, 03:52 PM   #2
im2ninja4u
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Looks good Paul, is it my turn yet .
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Old 09-22-2010, 03:54 PM   #3
Subian
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The 2.0L that could

Default

How many miles were on each car when they were tuned with the parts?
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Old 09-22-2010, 04:11 PM   #4
paul@YimiSport.com
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Location: Santa Clarita, CA
Vehicle:
2008 WRX STi
Laguna Seca Blue

Default

Quote:
Originally Posted by Subian View Post
How many miles were on each car when they were tuned with the parts?
Both had right about 1000 miles.
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Old 09-22-2010, 04:20 PM   #5
rockle3
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Location: Harrington Park, NJ
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I guess they dont care about warranty
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Old 09-22-2010, 04:38 PM   #6
fourmicah
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Silver

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Quote:
Originally Posted by paul@YimiSport.com View Post
Both had right about 1000 miles.
After my own heart!!
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Old 09-22-2010, 06:38 PM   #7
Speed
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Quote:
Originally Posted by rockle3 View Post
I guess they dont care about warranty
Some people are like that...

<-- I'm one of them.
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Old 09-22-2010, 11:26 PM   #8
Junior2JZ
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Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies @ P&L
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10.8 XT+10.0@143 GR+
2x9.0@170mph GTRs

Default

Nice work Paul!

Quote:
Originally Posted by rockle3 View Post
I guess they dont care about warranty
I have had 3 calls from guys with 11s looking for mods already, the dealers haven't even delivered the cars to them yet! 1 guy is looking for a 500+whp build already My kinda guys!

Jr
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Old 09-23-2010, 08:54 AM   #9
LatentWagen
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0508 Saabaru & specB
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Quote:
Originally Posted by rockle3 View Post
I guess they dont care about warranty
because that huge combo of parts is nearly impossible to return to stock
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Old 09-23-2010, 01:00 PM   #10
htowns_finest
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SPERM WHITE PEARL

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uuhhmm what's changed on the STI?????

same car last time I checked, all the parts from my 09 Wrx switched over to my 2011
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Old 09-23-2010, 01:47 PM   #11
RLR257
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2006 AW WRX Ltd
PPG'd EWG'd & Dom3'd(XTR)

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Quote:
Originally Posted by Speed View Post
Some people are like that...

<-- I'm one of them.
im kind of like that too. if know im going to be modding extensively, then theres no point. the guy at the dealership looked at me crazy when i told him not to worry about the warranty. then he proceeded to tell me i could get the warranty and still mod the car lol and it would be cool... unless i modded the ecu. 20k miles later, the car hasnt given me any problems. i bought it used though, if it were brand new then i wouldve had to think about it a little harder.
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Old 09-23-2010, 02:51 PM   #12
axion7606
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08 EvoX & FJ Tank

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Quote:
Originally Posted by rockle3 View Post
I guess they dont care about warranty
Evos and Subarus are meant to be modded, who rolls stock in one of these cars?
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Old 09-23-2010, 02:55 PM   #13
RLR257
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PPG'd EWG'd & Dom3'd(XTR)

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^^^ lol yea. ive see a few people in them with no mods lol and been wondering why they even bought it.
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Old 09-23-2010, 05:41 PM   #14
bettyblue
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very nice power
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Old 09-23-2010, 06:21 PM   #15
KB'izzle
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Default

bump for yimisport tuning

Last edited by KB'izzle; 09-25-2010 at 10:44 AM.
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Old 09-30-2010, 03:42 PM   #16
Digitalfiend
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DGM

Default

Quote:
Originally Posted by paul@YimiSport.com View Post
While the factory tune is still far from optimal, it does seem to be significantly improved from the earlier GR body STI's. The closed loop to open loop transition is shorter and doesn't force the car to run at 14.7:1 AFR while under full boost (unlike the earlier cars). As such it no longer threatens to blow itself up at any given time
I was actually surprised to see that Subaru riched up the Primary Open Looping Fueling A/B tables in the 3600-4400 x 1.3g/rev-1.75g/rev range. That would definitely help the car transition to OL sooner.
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