Tuning issue with the Apex-i Neo.
 

Just an FYI, Apex-i Japan is in the process of fixing a bug in the Neo. This is for cars using the Karman signal. Above 3500RPM, the output airflow signal is very erratic to what should be expected.

Credit goes to fellow 3000GT maniac Erik Gross for discovering the issue and contacting Apex-i.

http://www.supercar-engineering.com/...Neo/index.html

http://www.supercar-engineering.com/...ds/TT/SAFCNeo/

If you're nearing that part of your project where it's tuning time, and you have a Neo, wait a few weeks for a firmware update.