wongfei

It will be a track car for fun, nothing special, minimal tuning. The only requirements are installation in stock harness and possibility to read via PC all stock sensors data. Any recommendations?

IRPerformance

iTrader: (41)

Power FC with a Banzai adapter harness is your best bet. Yes it is older, but it has no bugs and does everything you need.

Pete_89T2

iTrader: (4)

^The highlighted statement above really limits your options to an Rtek 2.x, but that one doesn't talk directly to a PC/laptop -- You'll need an old Palm pilot as a user interface for tuning/logging. Besides, unless you install a new factory harness, using the original S4 harness, which is now over 30 years old, probably crunchy, corroded & electrically questionable, is just asking for trouble.