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Old 05-24-2010, 04:24 PM   #1
Cobb Tuning
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Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
Default COBB Tuning Surgeline's Week in Tunes! 5/17-5/21- COBB Tuning STi + 2010 Forester XT!

We only completed 2 tunes this last week. One was a 2010 Forester XT that was used to help develop OTS mapping and the other was our COBB Tuning Motorsports STi.

Our STi has been seriously overhauled very recently. We did our best to document this project and have put together a video of the process for your enjoyment.

As usual, feel free to ask any questions or make any comments.


2.5L w/GT35R tuned with AccessPORT

Location: COBB Tuning Surgeline
Ambient Temp: 57 F Daily Average
Elevation: Approximately Sea Level
Weather: Indoor

2006 Subaru STi
Tuner: Tim Bailey
Dyno Info: Mustang AWD-500
Peak HP at RPM: 512 WHP@6900RPM
Peak Torque at RPM: 424 WTQ@4800RPM
Baseline hp/tq for a stock on same dyno: 2010 STi: 239 WTQ, 228 WHP
Target Boost: 24 PSI
Target AFR: 7.2:1
Fuel: E85

Engine/Power Modifications:
- COBB Tuning AccessPORT
- Cosworth Long Block
- Perrin GT35R .82A/R Rotated Kit
- HKS Exhaust Manifold
- Cosworth Intake Manifold
- Surgetank w/Dual Bosch 044
- 2200cc Injectors


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Old 05-24-2010, 04:25 PM   #2
Cobb Tuning
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Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
Default 2.5L w/Stock Turbo tuned with AccessPORT

Location: COBB Tuning Surgeline
Ambient Temp: 69 F Daily Average
Elevation: Approximately Sea Level
Weather: Indoor

2010 Subaru Forester XT
Tuner: Tim Bailey
Dyno Info: Mustang AWD-500
Peak HP at RPM: 203 WHP@5580RPM
Peak Torque at RPM: 329 WTQ@2110RPM
Baseline hp/tq for a stock on same dyno: 2010 STi: 239 WTQ, 228 WHP
Target Boost: 13 PSI
Target AFR: 11:1
Fuel: Pump 92 Octane

Engine/Power Modifications:
- COBB Tuning AccessPORT

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Old 05-24-2010, 09:54 PM   #3
CatfaceType-R
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dude is that xt a rally tune? or is it just that low of boost for another reason?
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Old 05-24-2010, 11:27 PM   #4
cellgeek101
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Location: Hartford, CT
Vehicle:
04 STI JBP
07 LIMITED #602/ 06 BUSA

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Are you guys using the beta speed density software on your car?
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Old 05-25-2010, 09:50 AM   #5
Steve.804
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Location: Richmond, VA
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07 STI
Rotated 35R Jorge Tuned

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Nice response out of that 35R kit! I'd expect a bit more boost with a built block and E85? Curious also of the IDC using those 2200cc injectors. I've got a 35R kit going in this summer and I'd like to buy enough injector to run E85 once it becomes available in my area. I was thinking 1100+cc would be enough? But I see you guys running twice that with dual Bosch044 pumps. One not enough?
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Old 05-25-2010, 01:32 PM   #6
DeatschWerks
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Quote:
Originally Posted by Steve.804 View Post
Nice response out of that 35R kit! I'd expect a bit more boost with a built block and E85? Curious also of the IDC using those 2200cc injectors. I've got a 35R kit going in this summer and I'd like to buy enough injector to run E85 once it becomes available in my area. I was thinking 1100+cc would be enough? But I see you guys running twice that with dual Bosch044 pumps. One not enough?

Good question on the IDC of the 2200's at that power level.

DeatschWerks will soon be releasing our new larger 100% drop-in fitment injectors for those of you needing more than 1000cc. Our new 1300's would probably fit the bill for you.
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Old 05-25-2010, 02:16 PM   #7
Steve.804
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Rotated 35R Jorge Tuned

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^hey that's good to know!

I ran a set of DW 850's in my 02 WRX w/ 18G so I might as well run some DW 1300's for my STI

DW I'm going to send you a PM as I dont want to totally derail this thread...
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Old 05-25-2010, 02:48 PM   #8
Cobb Tuning
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Quote:
Originally Posted by cellgeek101 View Post
Are you guys using the beta speed density software on your car?
Nope -- just a good old fashioned AccessPORT and big draw-through MAF housing!

Quote:
Originally Posted by DeatschWerks View Post
Good question on the IDC of the 2200's at that power level.

DeatschWerks will soon be releasing our new larger 100% drop-in fitment injectors for those of you needing more than 1000cc. Our new 1300's would probably fit the bill for you.
Unfortunately not, 1300's or 1500's are not really enough to make big power on a 35R and E85. Anything past 500whp will require more juice

We are seeing 70%+ IDC on these setups, so 1500cc+ in gas equivalents of flow at full power.

Regards,
Lance
COBB Tuning Surgeline
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Old 05-25-2010, 04:07 PM   #9
Cobb Tuning
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DW1300's and DW1500's will be the bee's knees for the 20G-Dom3-30R size crowd though, they'll definitely be the nice bump in headroom that's missing between 1000cc and 2200cc gap currently.

Lance
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Old 05-25-2010, 09:00 PM   #10
Bailey
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2004 STi
35R is enough

Default More time attack tunes at Cobb Surgeline - 780 whp GTR goodness

The Cobb Tuning GTR was just given a fresh motor and tune in preparation for the remaining redline time attack events.

I just finished the tune last night and though i would share the results. The car is simply amazing. The AMS turbo's offer a broad power band and are capable of 200+ more whp than comparable stock turbo setups.

We normally place some fans behind cars to help move air mass out of the dyno room. This car blue the fan on its side and pushed it several feet out of the building!!

770 whp and over 700 ft pounds of torque.

All tuning below - including boost control was done with a Cobb AccessPORT.

AMS upgraded turbos with upgraded actuators
COBB Tuning prototype boost tubes
Cobb Tuning prototype 3.5 inch intakes
Injector Dynamics 2200 cc fuel injectors
two bosch 044 fuel pumps and customer Cobb Tuning Surge Tank - -8 AN fuel lines
E85 fuel
Cobb AccessPORT

Here is the dyno graph of the highest HP 25 to 26 psi run compared to a 21 psi run:


Same graph showing AF ratio data:


Here is a graph of our car running wastgate pressure of just 16.5 PSI compared to 19 psi:


Same 16.5 vs 19 psi with AF data:



Finally,
Here is a comparison of a stock GTR vs a stock turbo GTR on E85 (10.8 at 131mph in the 1/4 mile) vs our time attack GTR:


I can't wait to see this thing on track.
Any questions feel free to ask.
Best regards
Tim Bailey - Cobb Tuning SurgeLine
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Old 05-27-2010, 07:15 AM   #11
stg2wgn
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WRB - stg. 2

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Holy crap Tim, those curves are absurd. I cant believe how you barely even lost any lag over the stock turbos. Ill be by the shop sometime soon. Hopefully you will be around this time. Maybe youll have to take me for a quick ride in your gt-r if you have the chance ill call in soon after i recover from my wisdoms being out later this evening, i need to make an appointment to get my new steering rack on and pick up an accessport. the forester is getting some new parts (brakes, steering rack, tires) since things keep popping up from it being abused from being towed by the rv and maintained/driven by old people/useless wives. it also just kicked over 120k!

Last edited by stg2wgn; 05-27-2010 at 07:32 AM.
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Old 06-11-2010, 10:01 PM   #12
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any chance COBB can share the ptm file they used to achieve 320ft/lb of torque on the 2010 subaru forester xt?

why is it that on the older forester they can achieve over 260hp and 280ft/lb on stage 1 but the new ones only around 4% increase in hp and lower than 270ft/lb?

my email is canuckaudiovideo at hotmail dot com

thanks a lot for the ptm file
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Old 06-12-2010, 07:50 PM   #13
rexblake
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Black

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Yeah, those GT-Rs continue to impress me. Even those stage 2 numbers are insane!
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