Flex Fuel Installation Guide For VQ37VHR Vehicles (370Z, G37, Q40, Q60-Q50 14-15)
Naturally Aspirated Use
We will supply a new AN feed hose to replace the factory plastic hose. You will have to remove the factory line from the damper and install our EFI AN adapter.
Boosted [Turbo/SC] Use
The BTWTuning Flex Fuel Kit without the Nissan OEM provided fuel hose assembly – Since the car is boosted, it is assumed the customer is using a CJ Motorsports or Fast Intentions fuel supply kit. In this case, there is a fitting just after the fuel filter that will be disconnected, and our Flex Fuel sensor will be attached at this location using the provided AN fittings. Pictures will be added later.
Wiring: The color of this wire will vary by year, but most 370Zs will look like the picture below.
The yellow wire (Vout1 out of the analyzer) will be wired direcly to this OEM wire. You'll need to cut the grey wire far enough so it can be rewired back in the future if needed.
Instructions will be updated with at a later date with more pictures.
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Furthermore, we optimized the torque curve and incorporated additional features using Ecutek through the BT dongle and Ecutek's ECU Connect app. Adjustable Flex Fuel sliders were installed to emulate flex fuel without requiring the flex fuel sensor.
Take a look at the accompanying dyno sheets and images of Matt's NA build below!
http://www.the370z.com/engine-drivetrain/97666-world-record-na-vhr-build.html
Below is a comparison of the before and after Dyno Graphs.
]]>Unfortunately, the engine had lost one cylinder due to an overboost condition, which happened as the wastegate vacuum line melted and caused the wastegates to not open when target boost was reached. This is very dangerous, especially on a motor that has such a high compression ratio (The VQ37 has a 11:1 compression ratio).
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