try running an oil flush prior to your compression / leak down test. I ran lifter free and found that cleans the ring lands.

I had a look at your intake, I can see it's a short unit with the air cleaner up against the MAF. The issue you have is there is not adiquate length of pipe work to straighten out the air flow before the MAF reads it. You can test this by getting a length of hose 3 " say 500mm long connecting it to you MAF holder and putting the air cleaner on the other end. Or just fitting the stock air box back on.

have you looked at removing the MAF and going speed density ?


Ps I changed this post as my phone craped it's self half way through loading