S2KI Honda S2000 Forums - Greddy eManage Blue Auto Tune

So I finally have a stable tune with Greddy eManage Blue for turbo applications. I'd like to share how I did it. I did this myself without a professional, so any advice taken from this post is at your own risk!

Required components: Greddy eManage Blue, Greddy pressure sensor, LC-1 wideband

Wire the wideband o2 sensor analog output 2(brown wire) into the throttle position (grey) wire in the eManage. This allows the Airflow Adjustment Map to tune based on wideband o2 (throttle position %) and RPM. Note: I have my VTEC point set to trigger on boost. With this setup, VTEC will always engage if you are in boost.

53% = 15 AFR
47% = 14 AFR
40% = 13 AFR
33% = 12 AFR
27% = 11 AFR

@ startup (1500) Don't touch this column in AAM because it will affect your ability to start the car. It will start then idle die.
@ low RPMs (1500-3000) my turbo is spooling up so I target 14 to 15 AFR
@ med RPMs (3500-4500) I'm reaching atmospheric so I target 13 AFR (set more 0's in the middle for highway cruising and adjust in Addtl inj)
@ VTEC point (5000) It's so variable that I don't make a exact target AFR... this is in case you're full throttle or partial throttle VTEC.
@ high RPM (5500 - 9000) I'm targeting 12 AFR

https://lh6.googleusercontent.com/-2...utoTune+2.tiff

Now here's where the additional injection come into play... By using the Greddy Pressure Sensor (3 bar), I can fine tune the fuel beyond atmospheric (1.5V). The boost clamp is set to 2.86V because the ECU is still reading from the stock map sensor, and I don't want to throw a CEL. 1.5V on the Greddy Sensor is atmospheric.

1bar = 100kPa = 14.5psi
Stock Map Sensor = 1.75 bar = 175kPa = 25.375psi
Greddy Pressure Sensor = 3bar = 300kPa = 43.5psi

Greddy Map Stock Map Description
0V 0V Full Vacuum -14.7psi (0kPa)
1.5V 2.86V Atmospheric 0 psi (100kPa
3.62 5V Max boost for stock map sensor 10.88psi (175 kPa)
5V N/A Max boost for Greddy map sensor 43.5psi (300 kPa)

I'm currently only running 8psi of boost. As you can see, I inject the most additional fuel at 1.5V (atmospheric) where the stock ECU is clamped. This is where you will need to log AFR to determine how much additional fuel to map. The AAM map might need more tuning on the outer edges if you have a big turbo. For example, you might want the +20 and -20 to be +30 and -30, but don't forget to interpolate your values from the 0 mark up and 0 mark down. What I noticed though is that if you have too much of a swing between on either side of your 0 target AFR, your ECU to injector lag is long enough that your AFRs start looking like a bad roller coaster and it will feel like your car is pumping the gas pedal on and off. I this happens, reduce the amount of swing near the target line, and increase the variation near the outer edges of the map.

I'm still fine tuning my additional injection map, so if anyone sees something that sticks out let me know.