Work is back and busy so I haven’t really played with the car until this weekend. I managed to install Yaris 1NZ coil packs and write up a very detailed page on how to do so. I spent many hours reading up on coil pack workings and upgrades before doing this mod. I consider my page to be much more comprehensive than anything else I have come across, so check it out: Ignition Upgrade.
I am really excited by the improvement in performance. The car still doesn’t boost as hard as my old HKS 2510 equipped 180SX, but once the VTC is reinstalled the mid range improvement should be prolific. The current high RPM pulling power is at least as good. I think at least a few tenths will come off at the drag strip, which means the old system was really struggling.