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Old 12-14-2012, 03:59 PM   #1
Cobb Tuning
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Default COBB Tuning AccessPORT + 2L Speed Density + 2004 WRX Wagon = 500whp

COBB Tuning AccessPORT + 2L Speed Density + 2004 WRX Wagon = 500whp


Much to my excitement, COBB Tuning released Speed Density for the 2002-2005 2L WRX earlier this year. We’ve seen some good initial results posted from cars using this great new tuning solution and I wanted to share my recent personal results. One of my goals has been to get my personal car to 500whp on the factory ECU on Surgeline’s “new” dyno settings, which read a bit lower following a summer hardware upgrade from Mustang Dyno. I first began tuning this car’s factory ECU with Dom of Maxwell Power using rudimentary tuning tools when it was bone stock, over six years ago, making around 180whp. Bringing things full circle back to the ECU at 500whp with an elaborate custom-coded tuning option sounded like a fun challenge – and mission accomplished!

Until Speed Density became available, I ran this car on a standalone for over three years. This was because making 500+ whp with precise fueling, timing and boost control under various conditions was nearly impossible on the 2.0L WRX chassis due to the numerous numeric limits (such as MAF g/s, load and boost target) inherent to the factory ECU structure. Previously, getting around these meant switching to a standalone ECU, crude piggyback device or an elaborate chassis harness swap to use the more powerful 2.5L ECU. These limitations have now been FULLY addressed with the new COBB AccessTUNER 2L SD software, as well as the addition of a true “Speed Density”-based fueling strategy that allows for full deletion of the MAF sensor and housing. Combine this with other new developments like the prevalence of E85 fuels and high-quality injector options from Injector Dynamics and some really big power numbers start to become a feasible reality!

My car now starts, idles and drives worlds better on the factory ECU than it did on the standalone. Suffice to say, the factory ECU and AccessPORT switch has been very advantageous for me. Having the AP available as a digital gauge display and realtime map switching device has been awesome. Neutral position for my 2006 STi 6MT gearbox is even detected correctly thanks to a new AccessTUNER toggle that allows for inverting the NPS polarity/position for 6MT and model year transmission swaps. Per-gear wastegate duty cycle and boost target compensations have allowed me to get great boost control through all six gears, even with a big turbo. I just can’t say enough about the flexibility and power offered by the new 2L SD software. I have posted some screen shots and a data log from the dyno session for your enjoyment and criticism.

For those of you that love a lot of data, I also found a nifty way to log auxiliary devices through the factory ECU – I am logging my PLX SM-AFR Gen2 wideband for now – by using the often-unutilized TGV Left and Right 0-5v shaft position inputs. I simply connected my wideband’s 0-5v analog out to the TGV Left input wire at the ECU. By logging that voltage monitor, I can quickly convert to AFR when desired within in my logs in Excel.

I am hoping to see many more cars tuned using this incredible new option as time goes on. If you’ve done a big build in your WRX and are now using COBB SD, post up and tell us more about it! We love seeing our products being put to good use and making big horsepower in the wild. Or, if you’ve been on the fence about it, contact your local Authorized ProTUNER or COBB Tuning retail facility and make the switch to COBB 2L Speed Density today!

Also, MANY thanks to the various people and companies who have helped me out along the way. Sorry to anyone I've forgotten...you are ALL important!
  • COBB Tuning Surgeline
  • COBB Tuning Subaru AccessPORT Team
  • Injector Dynamics and T1 Race Development
  • Perrin Performance
  • Kartboy
Best regards,
Lance Lucas
COBB Tuning Surgeline

-----------------------------------------------------------------------

Event: Dyno Pull
Location: COBB Tuning Surgeline, Portland, OR, USA
Ambient Temp: 40 degrees F
Elevation: ~200ft
Weather: Cold and damp
Tires: Dunlop Direzza DZ101 225/45R17


Car: 2004 WRX Wagon
Tuner: Lance Lucas, COBB Tuning Surgeline
Dyno Info: Mustang AWD-500-SE
Transmission: 2006 STi 6MT
Gear: 4th
EMS: COBB AP using 2L SD / Factory ECU

Peak HP at RPM: 501 whp @ 6075 RPM (no weather correction)
Peak Torque at RPM: 484 wtq @ 5150 RPM (no weather correction)

Baseline hp/tq for stock: 250wtq / 250whp (2013 STI Sedan)

Target Boost: 27psi
Target AFR: 11.8 gas eq.
Fuel: E85

Engine/Power Modifications: COBB Tuning AccessPORT with 2L SD Tune, AEM 3.5 bar MAP Sensor, AEM IAT Sensor, Built 2.5L EJ257 – Cosworth Pistons/Manley H-Beams/ACL Race Bearings/ARP Studs, Stock Bore & Sleeves, BC272 Cams, LIC Adjustable Idlers, Perrin Big-Tube EL Header, Perrin GT35R (.82) Turbo Kit, Perrin FMIC, 3” Short Intake with Amsoil Dry Air Filter, Factory IM, TGV Deletes, Perrin Fuel Rails, Injector Dynamics ID2000 Injectors, Radium Surgetank w/Twin Aeromotive 340LPH Pumps, Aeromotive 340LPH Lift Pump, -6 AN Teflon/SS Feed Line, Crawford V2 AOS, Koyo Aluminum Radiator, lots more.

Driveline Modifications: 2006 STi 6MT, R180 and Driveshaft, DSS Stage5 Rear Axles, DCCDPro DCCD Controller, ACT HD 6-puck Sprung Clutch.

Suspension Modifications: Tein Street Basis Coilovers, Perrin F&R Swaybars, Kartboy Endlinks, Perrin STi Adjustable Lateral Links, Whiteline/TIC/Kartboy Bushings, Whiteline Roll Center Kit, 2004 STi Steering Rack.

Other Modifications: Brey-Krause Fire Extinguisher Mount, Amerex Fire Extinguisher, 2005 STI Interior Conversion, JDM V8 STI Front Seats, Full Diamond Audio Stereo, too much to list.

-----------------------------------------------------------------------





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Attached Files
File Type: pdf 2L SD Log.pdf (32.2 KB, 18 views)

Last edited by Cobb Tuning; 12-26-2012 at 03:43 PM.
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Old 12-14-2012, 04:12 PM   #2
tom@kartboy
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!!! Holy smokes Lance. Nice work
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Old 12-14-2012, 04:45 PM   #3
207STi
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Any word on compatibility with JDM 16-bit ecu? I've been looking to run SD on my 207 for quite some time but didn't want to go stand alone.
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Old 12-14-2012, 04:56 PM   #4
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<3<3<3<3<3
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Old 12-14-2012, 05:01 PM   #5
Clark Turner
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Good Job Lance.. Nice power man!
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Old 12-14-2012, 05:09 PM   #6
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Holy wagon... must feel amazing when it starts haulin at 4k rpm!
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Old 12-14-2012, 05:46 PM   #7
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GOD!!!! thats nice!
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Old 12-14-2012, 06:00 PM   #8
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Quote:
Originally Posted by 207STi View Post
Any word on compatibility with JDM 16-bit ecu? I've been looking to run SD on my 207 for quite some time but didn't want to go stand alone.
I believe they have answered this before and I don't think they have an option or even any plans on a v7/v8 ecu version. Currently your only speed density options on a JDM ecu I know of are group N and carberry ROMs via opensource.

Edit: Might I add, if they did have an Accessport capable of working with a JDM ecu, I would have liked to do a compare/contrast against carberry on my S400SX build.

Edit2: If you removed AVCS and went back to a regular WRX ecu, you could then use the AP.

Last edited by RexFTW; 12-14-2012 at 06:08 PM.
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Old 12-14-2012, 06:19 PM   #9
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Quote:
Originally Posted by RexFTW View Post

I believe they have answered this before and I don't think they have an option or even any plans on a v7/v8 ecu version. Currently your only speed density options on a JDM ecu I know of are group N and carberry ROMs via opensource.

Edit: Might I add, if they did have an Accessport capable of working with a JDM ecu, I would have liked to do a compare/contrast against carberry on my S400SX build.

Edit2: If you removed AVCS and went back to a regular WRX ecu, you could then use the AP.
I knew I would be able to with the usdm ecu but no way I'm ditching avcs. The reason I have stayed away from carberry is two reputable tuners have warned me that knock control is not quite there for the ROM.
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Old 12-14-2012, 07:57 PM   #10
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Is the software version really called 2L and the block is a 2.5L?

Con-foo-sing.
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Old 12-14-2012, 08:13 PM   #11
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Quote:
Originally Posted by Concillian View Post
Is the software version really called 2L and the block is a 2.5L?

Con-foo-sing.
using a 16bit ecu (found in 2002-2005 wrx with 2.0L)
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Old 12-14-2012, 10:03 PM   #12
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We call the 16 Bit ECUs,Two liter ECU's as that is the engine the ecu ran in the wrx, hence the confusion.

Its possible for cobb to produce the JDM V7 and V8 option for the Ap2. If enough people signed a list or posted on there forum asking for that feature, I am sure they would do it.

However, You can use the US ECU and loose AVCS. For me, I would rather have some non avcs cams anyways. But I like top end power

C
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Old 12-15-2012, 12:01 AM   #13
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Quote:
Originally Posted by 207STi View Post
I knew I would be able to with the usdm ecu but no way I'm ditching avcs. The reason I have stayed away from carberry is two reputable tuners have warned me that knock control is not quite there for the ROM.
This is false actually. I don't know where people keep getting this from, Carberry has fully functioning knock control along with more control than any of the available opensource maf roms. And it will support your avcs.
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Old 12-15-2012, 02:29 AM   #14
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Very very nice Lance!!

COBB FTW!!!
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Old 12-15-2012, 09:29 AM   #15
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Now thats a 2.0 that could.

Great job Lance!
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Old 12-15-2012, 12:18 PM   #16
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Quote:
Originally Posted by Carbibbles View Post

This is false actually. I don't know where people keep getting this from, Carberry has fully functioning knock control along with more control than any of the available opensource maf roms. And it will support your avcs.
I was absolutely not trying to trash talk your ROM by any means. In fact, I've gone to a few tuners asking for them to tune my setup with carberry and none of them would. I was just stating what I have been told by professionals. Sorry for the threadjack.
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Old 12-15-2012, 12:34 PM   #17
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Very nice!
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Old 12-15-2012, 07:35 PM   #18
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wow! great work.
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Old 12-16-2012, 12:18 AM   #19
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I've had very good luck with the carberry rom and reached a higher number than my goal even, (527whp mustang Dyno). But I can't wait to switch to Cobb SD on the new setup.
Nice work!
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Old 12-16-2012, 02:08 AM   #20
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Good job buddy!
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Old 12-17-2012, 11:12 AM   #21
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Awesome work Lance! Come back out to EFI this spring so I can get my built hybrid retuned with SD!
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Old 12-17-2012, 12:51 PM   #22
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Holy cow Lance, awesome job dude!!

When we spoke last week you mentioned logging the afr thru the TGV position sensor. How did you find the 0-5V scale for your PLX SM-AFR Gen2? I will more than likely going to do this with my LC-1. I'm assuming would you need to convert (the 0-5V) in your head in real-time if you watch your laptop while you log/monitor and not the wideband proper.

It would be awesome in the future if you guys could add an option in ATR where you could wire up the wideband to a specific TGV pos sensor and allow the user to manually input wideband model/and/or the 0-5V scale, then have AccessTuner do the conversion in realtime! This would skip the conversion step in excel!

Last edited by wgr73; 12-17-2012 at 01:22 PM.
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Old 12-17-2012, 09:06 PM   #23
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Nice work! Cobb's speed density implementation is fantastic.
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Old 12-17-2012, 09:10 PM   #24
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Wow!!
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Old 12-18-2012, 05:25 PM   #25
Cobb Tuning
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Thanks for the kind words everyone!! Glad you enjoyed my lil story

Quote:
Originally Posted by 207STi View Post
Any word on compatibility with JDM 16-bit ecu? I've been looking to run SD on my 207 for quite some time but didn't want to go stand alone.
We have certainly discussed it but have no immediate plans at this time. The possibilities are very exciting but it's always a tough business case to make.

Quote:
Originally Posted by ronnie s View Post
I've had very good luck with the carberry rom and reached a higher number than my goal even, (527whp mustang Dyno). But I can't wait to switch to Cobb SD on the new setup.
Nice work!
Dang that's some serious HP! Let us know how it goes with COBB SD!

Quote:
Originally Posted by berge56 View Post
Awesome work Lance! Come back out to EFI this spring so I can get my built hybrid retuned with SD!
I'd love to make a spring trip out!

Quote:
Originally Posted by wgr73 View Post
Holy cow Lance, awesome job dude!!

When we spoke last week you mentioned logging the afr thru the TGV position sensor. How did you find the 0-5V scale for your PLX SM-AFR Gen2? I will more than likely going to do this with my LC-1. I'm assuming would you need to convert (the 0-5V) in your head in real-time if you watch your laptop while you log/monitor and not the wideband proper.

It would be awesome in the future if you guys could add an option in ATR where you could wire up the wideband to a specific TGV pos sensor and allow the user to manually input wideband model/and/or the 0-5V scale, then have AccessTuner do the conversion in realtime! This would skip the conversion step in excel!
PLX lists the conversion in the tech docs for the wideband but it's pretty easy to remember -- voltage*2 + 10. Innovate allows you to set the 0-5v output scaling, so you could choose something really basic if you wanted like 10-20 AFR from 0-5v.

That's definitely a good idea! Hopefully we can allow logging parameters to be user-customizable some day. With stuff like flex-fuel sensors becoming more prevalent, being able to monitor those things through the ECU itself is a fantastic feature.

Cheers

Lance
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