Originally Posted by thez99
Look at the power numbers from the other ports compared to ours, and also look at the individual things the ports for other cars can do compared to ours. The one they have for the 135i makes the most power with the most perks. Also, prob more difficult of a flash due to our more difficult to mess with ECU
Not every car's ECU is the same obviously, more computing, more work, more labor all mean more money
I call BS. Based on what map/tune is used, there could be more or less power to play with. My last experimental car was a 2010 Mazdaspeed3; my buddy had an AP on his 2009 speed3 and that thing was a rocket. The "greater" power gains you see on this engine are due to 2 extra cylinders and larger displacement, as well as 2 turbo's on an n54. Subaru's, Mazdaspeed's, and Evo's are all turbocharged 4-bangers.