I need to jump into this thread...
My plan for spring is to go back to an internally gated setup, 90% sure I will be rocking the 7670 .92a/r BW EFR. I have spoken to a lot of people and it looks like its what I am looking for in terms of down low power and powerband, should have peak torque around 4k rpms.
Most who have tried this one on Evos say its a stock turbo on steroids feel, can't wait to try it out.
I have been very skeptical of BW turbos for a while, ever since they released the EFR's but almost every turbo in the top 5 for world time attack runs an EFR now. I have tried everything else, mind as well try this right?
Here is an Evo X comparison (2.2L motor) of the 7670 EFR vs the 9180 EFR