You'll need to make a log of your current tune and a backup of your current ECU ROM, then send those and your mod list to me via e-mail. I'll need 3 back to back 3rd gear pulls. Start the logger, get your car to 2500 RPM and hold it there for a few seconds, then suddenly go to 100% throttle and hold it to redline with only these items being logged.
- TPS
- RPM
- TimingAdv
- O2Sensor
- InjPulseWidth
- Battery
- LoadCalc (load in mitsulogger)
- KnockSum
- AFRMAP
- Wideband A/F Ratio (I highly recommend the LC-1 + DB gauge from www.tunertools.com)
If you have upgraded injectors, turbo or cams you can skip the logs until I send you a base ROM to start the car with. If you have upgraded injectors you'll also need to log 02 feedback, fuel trims low and mid. The fewer the items you log, the more data per RPM we'll get, which makes it easier to see a pattern. Please don't allow the car to cool down for long periods between runs. We want to simulate harsh conditions to make sure the tune is safe. Once I receive your files and mod list, I will re-work the a/f and timing maps and send you a new ROM file. You'll flash the new ROM to your ECU, logs some more runs and send the results back to me. This process will be repeated until we get the air/fuel/timing dialed in and knock under control, meaning 3 or less counts consistently. Making changes to the car's octane, boost or mods will halt the tuning process and additional charges may be necessary to continue. I'll work with you throughout the process and explain where I'm making changes and why.
