zero260

I'd double check the diameter compared to your LGT rotors, if I remember correctly the WRX had smaller rotors, which should account for the mass, but you'd lose overall braking performance.

Dorman makes the Quick disconnect fittings part # 800-120

What's interesting is, my 2012 2.5i Outback is even worse aerodynamically, but I haven gotten 33mpg on it (even though it's rated at 28mpg epa). But Subaru did something in 2010+, because pre 2010 2.5i outbacks were rated at 26ish.

 

in 2010 the biggest change was the CVT transmissions on Outback and legacy models. I have a '11 legacy 2.5i and I get 34.5 mpg on the highway.

 

What size tires are you running? Running taller tires helps reduce your RPM's, but this is where you can't have your cake and eat it, because taller tires are heavier. What's worse is they move the weight to the outside of the wheel where it is harder to rotate. This is why 17" rims over 15" hurt gas mileage very minimally.

 

cheap aftermarket 17s with factory sized tires for 17" rims

 

Now onto your actual mods and tunes

How much timing are you running at the 70mph RPM before 1.00 g/s? With your mods,18g specifically, you might be running too much timing.

 

Are you going into open loop a bunch?

 

With aftermarket exhaust/DP, Are your AF3 adjustments disabled?

 

Base timing @ 2800rpm

0.25 0.40 0.60 0.75 0..90

40.11 40.11 43.28 43.28 40.11

 

I only go into open loop when accelerating to speed

I have disabled AF3 adjustments

 

I'm currently running wastegate boost(12 psi) until I have my full maf scaling locked in(I'm close)

I tried out your AVCS table and changed upped my base timing a few degrees in the cruising areas. I managed 27mpg around 55-60, but that dropped to 24 at 70-75. how are you getting 31mpg?

 

05 OBXT manual, rebuilt 4k miles ago. full exhaust, 18g, sti manifold, 3mm spacers, tgv deletes, 06 wrx flywheel clutch combo, tuned with romraider.

I am looking into an outback xt manual with this motor swap and my question is, do most people do this swap with the US ECU or wire in the JDM ECU? I am wondering on how far I have to dig into it to find out how the seller had it done, I would prefer the JDM ecu. What are your opinions?