Power problems with JWT C2s

[Ari]

Just for kicks today I bought a new air filter and converted my intake from
CAI to WAI.  The first thing I noticed was that it leaned the engine out big
time.  Before the WAI I was running 13.8-13.3 from 2000-4500rpm and
12.6-12.2 from 4600-8000rpm.  Now its doing 14.3-13.8 from 2000-4500rpm and
13.6-13.2 from 4600-8000rpm.  Also the peak maf voltage dropped to 4.50v vs
the 4.62-4.63v I was getting before.

After a few road dyno pulls I found more power from 6000-8000rpm 4-6whp at
peak and a max difference of 9whp.  However my CAI air filter was very dirty
so my next step is to put the new filter on the CAI and do some pulls.  Also
I will try adjusting the AFR with my nismo FPR to see if I can pull somemore
power out of it.