My 08 Stage1 Spec.B on the Dyno - Cobb V2 and interesting results!

Hey guys,

 

I want to start by saying that in no way am I advertising, this is my own personal car in which I want to share the personal experiences and growth of the car.

 

Well I finally had enough time to throw the SpecB on the dyno. I decided to do a few things on it, I wanted to baseline the car in all three SI Drive modes before I flashed it, to get an idea of what each puts down. Now, I know how the SI Drive works, but I never actually tested a bone stock car and see the results on the dyno.

 

For starters, I brought the car up to temp on the dyno, and turned our Shop fan on which simulates a full 55mph wind (trying to get as close to real world driving conditions). Since the fan blows so well, we have the ability to dyno TMIC cars with the hood closed, and it's very effective.

 

The first pull was done in Sport Sharp mode, which is Subaru's most aggressive Requested Torque table. The car laid down a respectable 228whp and 221wtq @15psi in this mode, but the AFR has that typical Subaru Stoich setting until 3200rpm, about 800rpm already into full boost. This is just not safe, and really makes you wonder what Subaru was thinking when leaving the CL delays for so long (To meet EPA standars I'm sure).

 

Second pull was done in Sport, pretty much the same scenario, 214whp and 221wtq with the same lean condition.

 

Third pull was done in "Intelligent". This mode shows it's true colors with only 193whp and 196wtq @ 8psi of boost. Again, same lean condition, and much leaner across the entire powerband due to the drop in boost.

 

http://efilogics.com/leggy/SpecB_stocktune_analysis.JPG

 

 

 

 

Now came the time to flash the car with Cobb's awesome new AP V2 CAN setup. I plugged the AP in and flashed it with Cobb's Stage1 93 Octane V103 Map. While it was flashing, I took the opportunity to install their radiator shroud, and neat looking license plate bracket. The radiator shroud is really nice, and I like the design behind it, forcing air into the front inlet to the air box.

 

Once the AP finished flashing, I let the car get up to temp again. I did three pulls, with about 3 minutes between each pull. This was done to get the IAM up to par for full power. In the end, the peak power was 229whp and 249wtq @15.4 psi. Although the peak power gains were not that substantial, the overall power gains were impressive. The best part about the Cobb OTS map is the fact that they shorten the CL delays to help bring CL much sooner and closer to peak torque / boost. Looking at the dyno sheet, you can see how much happier the car is over the stock Sport Sharp setting due to the torque curve smoothing out, this is a good sign that the car is no longer pulling timing due to knock.. This is the same reason that the 08 STi is having engine issues, the Legacy is obviously not immune to these issues.

 

http://efilogics.com/leggy/SpecB_CobbStage1_analysis.JPG

 

 

I will definitely be ProTuning this car myself next week, but I wanted to get a feel for the OTS Cobb map since I have never driven one before. I can tell you on my 45 minute ride home, the car was much better and smoother, not to mention more powerful. I will post back in this thread once I tune it to see how much more I can gain with my own Stage 1 tune and SI drive settings.

 

A Couple of pics, Video is on youtube here: [ame=http://www.youtube.com/watch?v=j6Q8SDV6Eyg]YOUTUBE VIDEO[/ame]

 

http://efilogics.com/leggy/leggy_dyno_stage1_1.jpg

 

http://efilogics.com/leggy/leggy_dyno_stage1_11.jpg

 

http://efilogics.com/leggy/leggy_dyno_stage1_14.jpg

 

http://efilogics.com/leggy/leggy_dyno_stage1_9.jpg

 

http://efilogics.com/leggy/leggy_dyno_stage1_5.jpg

 

http://efilogics.com/leggy/leggy_dyno_stage1_6.jpg

 

http://efilogics.com/leggy/leggy_dyno_stage1_8.jpg

Nice to see some results from an 08. The stock numbers aren't too bad, but the stage 1 don't seem all that great. I wonder if it would do better with some ecu adjustment time?

where did you get the radiator shroud?

where did you get the radiator shroud?

 

Are you serious? LOL..

 

I got it from Cobb Tuning. http://www.cobbtuning.com

well what i meant to say is, it didnt come with your V2 did it? just saying cause ill be pissed if it did and i didnt get one :-D

Nice to see some results from an 08. The stock numbers aren't too bad, but the stage 1 don't seem all that great. I wonder if it would do better with some ecu adjustment time?

 

I brought the ECU up to 1 on the IAM by logging it. The car was up to 100% power. I really don't think the stage 1 tune will make that much more power, what I was really concerned about was the Closed loop Delay from the stock calibration, I'm happy Cobb cleaned that up. As far as I am concerned, Subaru should've calibrated the car like Cobb did, from the factory, much safer.

well what i meant to say is, it didnt come with your V2 did it? just saying cause ill be pissed if it did and i didnt get one :-D

 

Oh.. haha.. No, that was a seperate purchase, along with my Cobb Hoodie and stage 2 suspension, which is going on next week

Alright, I have to ask. What's the deal with headlights? Those are freakin' hot! Gorgeous car, too. Back on topic, you only gained 1HP but a decent amount of torque? Am I reading that right? Then again, everyone claims the 07/08MY cars don't gain like the older gens but the driveability is a lot better. That, and the torque gain is what you use on the street along with the added AFR correction.

Alright, I have to ask. What's the deal with headlights? Those are freakin' hot! Gorgeous car, too. Back on topic, you only gained 1HP but a decent amount of torque? Am I reading that right? Then again, everyone claims the 07/08MY cars don't gain like the older gens but the driveability is a lot better. That, and the torque gain is what you use on the street along with the added AFR correction.

 

Thanks man.. The link to my write-up on the lights are here: http://legacygt.com/forums/showthread.php?t=99597

 

The PEAK gains were 7whp and 20ft/lbs of torque. The overall gains were an average of ~10whp and ~30wtq.. The car FEELS much better then stock on the street. I can't wait to tune this thing myself to see what I can get out out of it with just the tune.

I'm anxious to see how far it can be tuned over the cobb stage 1 OTS map as well.

Wow, you paid $400 for all that? Their prices mist have skyrocked since then. $60 for amber removal, 160 for painting, 55 for angels, and over 1k for the deposit and conversion. Looks like you bought in at the right time.

Did it take care of the stutter from 3000-4000 RPM? Judging from the dyno graph, it looks like it did.

 

Dave

Wow, you paid $400 for all that? Their prices mist have skyrocked since then. $60 for amber removal, 160 for painting, 55 for angels, and over 1k for the deposit and conversion. Looks like you bought in at the right time.

 

Where are you getting these prices? The HID conversion was cheap, I used the stock projectors, I didn't convert them.

Did it take care of the stutter from 3000-4000 RPM? Judging from the dyno graph, it looks like it did.

 

Dave

 

Yes, it did.. That was so annoying.

Where are you getting these prices? The HID conversion was cheap, I used the stock projectors, I didn't convert them.

I got confused looking on their website. My mistake. I was looking at the TSX and S2000 coversions and not thinking about using the OEM projectors. I may need to pick up some used headlights on Ebay and check into this.

I got confused looking on their website. My mistake. I was looking at the TSX and S2000 coversions and not thinking about using the OEM projectors. I may need to pick up some used headlights on Ebay and check into this.

 

No biggie.

I brought the ECU up to 1 on the IAM by logging it. The car was up to 100% power. I really don't think the stage 1 tune will make that much more power, what I was really concerned about was the Closed loop Delay from the stock calibration, I'm happy Cobb cleaned that up. As far as I am concerned, Subaru should've calibrated the car like Cobb did, from the factory, much safer.

As should many other companies. VW is another one who should really have sold their cars with "stage 1" tuning. Better running, 50hp/85tq gains, and about 6MPG... Oh well. I'm pretty excited for my Cobb AP.

I just flashed Cobb's OTS stg 1 map w/ a catless UP, and I was pretty surpised at the minimal power increase. I did notice a little smoother powerband & throttle response on my first test run..

 

That said, a couple days later, as I was told might happen, the car has come alive a bit more.. Power in the low & mid range has jumped up quite a bit, and I will say from the first run to now it's a different car (~3 days)..

 

 

FWIW, I have no real data only road time, but I might get the car back on the dyno after a couple days to see if anything has changed..

As should many other companies. VW is another one who should really have sold their cars with "stage 1" tuning. Better running, 50hp/85tq gains, and about 6MPG... Oh well. I'm pretty excited for my Cobb AP.

I hear ya on that. A friend has a 1.8 GTi with a CAI, catback and GIAC reflash. Going from 8lbs of boost to 21 makes a hell of a difference.

I just flashed Cobb's OTS stg 1 map w/ a catless UP, and I was pretty surpised at the minimal power increase. I did notice a little smoother powerband & throttle response on my first test run..

 

That said, a couple days later, as I was told might happen, the car has come alive a bit more.. Power in the low & mid range has jumped up quite a bit, and I will say from the first run to now it's a different car (~3 days)..

 

 

FWIW, I have no real data only road time, but I might get the car back on the dyno after a couple days to see if anything has changed..

 

Cobb set's their Initial Advance multiplier to .8, which runs about 80% of total timing allowed until the car is "happy" after a reflash. After some high load pulls on the highway or dyno, the IAM will then go to 1.00, which then allows the car to run full timing advance based on what is in the DA table. What you are feeling after driving the car is the fact that your IAM probably advanced to 1.00.

 

- Chris

Chris -

 

I just want to say thanks. The graphs and dynos are awesome, and I think this is great for Cobb Stage 1. Obviously there's not as much to gain at Stage with with the CANBus Subies....but you gained a solid dollop of torque, a much better AFR sooner in the powerband, and a solid power increase across the powerband with most of the gain coming in everyday RPM areas.

 

Your dyno seems like it reads a bit "high" compared to most, as ~230whp is the arena of a stock STI, is it not? Or at least, in that arena for most dynos.

 

Definitely interested to see what you've got with further tuning.

 

Joe

Does the Cobb map work in all SI Drive modes or just the ones you select? I'm thinking of going this route.

I just flashed back to Cobb's 93 OTS map (I'd reverted to stock for a visit to the dealer for the oil-line recall), and, yeah, it's like I thought before: better. No miracles, but definitely better.

 

The graph validates something I've noticed subjectively -- more torque sooner (thanks for posting it). That, I think, is the biggest difference, and it's quite noticeable. HPH

Does the Cobb map work in all SI Drive modes or just the ones you select? I'm thinking of going this route.

 

Yes, it will primarily work with Sport#, and the other modes will feel better.. But Intelligent is still a sled

Chris -

 

I just want to say thanks. The graphs and dynos are awesome, and I think this is great for Cobb Stage 1. Obviously there's not as much to gain at Stage with with the CANBus Subies....but you gained a solid dollop of torque, a much better AFR sooner in the powerband, and a solid power increase across the powerband with most of the gain coming in everyday RPM areas.

 

Your dyno seems like it reads a bit "high" compared to most, as ~230whp is the arena of a stock STI, is it not? Or at least, in that arena for most dynos.

 

Definitely interested to see what you've got with further tuning.

 

Joe

 

Not sure why, it's brand new, like a week old... I can say that the ambient temp in the shop was around 40*, and our fan in the dyno cell is serious.

 

http://efilogics.com/customer/subie/fan.jpg