TurboNub
Well-Known Member
- Thread starter
- #16
I would love to see your car dyno'd, if it really is pushing that much power as they say call me impressed! Im still waiting on the NX2 as its on back order :( but really appreciate your time on this and I feel like everyone should be running this setup. This shit makes me pumped!!!XDI2050 injectors finally arrived today! XDIs are on the left and OEMs are on the right in the pictures. They look about the same from the side and nozzle views, but XDI’s inlet is definitely bigger. The fourth picture shows XDIs mounted on the fuel rail, ready to install.
None of the OEM injectors were stuck to the head as they all popped out along with the fuel rail. If any of them were stuck, the injector puller (cheaper Chinese copy) would’ve worked as shown tested on an injector in the last picture.
Log comparison
Final tune with XDI-EVO pump and OEM injectors with E85 fuel at ~6K RPM:
Boost pressure: 26.01
AFR: 14.26
FRP: 2834
STFT(%): 8.59
Looks like OEM injectors can’t flow enough at high RPMs as AFR was on the lean side. STFT(%) was positive, so I believe the ECU tried adding more fuel without luck, even though the FRP was good. However, the car felt fine during the pull and I didn’t notice any knocks or negative ignition corrections, but the tuner advised against pushing it until the injector upgrade.
Base tune with XDI-EVO pump and OEM injectors with E85 fuel at ~6K RPM:
AFR: 11.61
FRP: 2825
STFT(%): -11.72
AFR looks much better. Similar FRP but negative STFT. Perhaps the base tune is on the safe side with the amount of fuel and the ECUs trying to trim excess fuel?
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