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2008 Outback XT Limited 2011 Outback 2007 Outback Impreza yes three of them.
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19 Posts
Discussion Starter · #1 ·
:nerd: Read Read Read. I have downloaded my XT's ECU instruction set.
Cross comparing targeted boost found WRX 13.4 psi compared to XT 13.54.
But there is a lot more 13.4's in WRX than 13.54 in XT.
next looking at fuel mixtures on each. Old school rule of Thumb on turbo boost is 10 psi 2x original HP. If this were true in new school XT hp should be 340 hp at 10 lbs with the right curve an mixtures of fuel. " more to come soon". Note doing a full review before reprogram the ecu. >:)
 

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Registered
2008 Outback XT Limited 2011 Outback 2007 Outback Impreza yes three of them.
Joined
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19 Posts
Discussion Starter · #2 ·
Progress on my ECU programing for 2008 Subaru Outback.
First with copy pasting all information that differed from the 2009 WRX STI " some times all info would not fit so I used parts that would fit in improve performance supposedly. It did increase the HP but it made in run with hick_ups and a hair a triggered throttle response to points were dangerous to drive. hp shown on DashCommand ap
on a Zero to 45 mph run in I was a amazing 320 hp.
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Step two was to make this more a predictable driver with out any loss of hp gains.
I resolve this by changing all the Drive By Wire settings maps. More nearly back to original Profile in the stock map .
This made the engine run more responsive that just using the WRX Profiles Plus it shown 330 hp 1 hp gain over the first attempt..
Please note I did not loose any mpg possible gain some.
Things I noticed by driving in local traffic and interstate more torque in I with and with out cruise control on. with cruise control on and pushed button to accelerate it will get up to speed a little more aggressive than the stock map. In merging into heavy Traffic were most sit an pray for an opening you can power into it much more aggressively than with stock map.
 

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Registered
2008 Outback XT Limited 2011 Outback 2007 Outback Impreza yes three of them.
Joined
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19 Posts
Discussion Starter · #3 ·
Back to tuning today on my Outback. I refined my map mods to the 2009 WRX data. then I reduced the valve advance by 5 degree in the high degree area were it was 40 now 35 degree. I did this just to gain MPG and it did just that. was with stock map averaged 20.4 mph at 50 mph now its average is near 28.0 mpg @50 mph.

In sport and sport sharp I set power settings to max of the WRX 2009
In Intelligent mode I set power settings to OBXT 2008 MAX.
Ending up with nearly 315 hp and 280 ft lbs torque.
faster close to open loop settings
also faster response from the gas pedal.
 

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