Project NSX: Part 18 – DBW Conversion with Motec

1992 NSX engine bay before and after throttle cable removal

The throttle cable (left) is a bit of an eyesore and out of place on our otherwise clean engine bay.  For our Drive-By-Wire (DBW) conversion, removing it (right) was one of our first steps.

NSX Throttle cable removed holeThe throttle cable was removed from the rear bulkhead and left this hole.  We used a rubber grommet to plug it and then drilled a hole just above it to fit our bulkhead connector.

NSX fuel pump resistor removalThe OEM Fuel Pump Resistor (left) was no longer needed since our ECU Master PMU-16 now controls the fuel pump directly.  We were able to remove it (right) and can now see the new autosport engine wiring harness bulkhead connector to the right of it.

NSX Milspec WiringThe mil-spec engine sensor harness is responsible for everything from a new crank position sensor, fuel pressure, multiple oil pressures, flex fuel sensor, multiple temperature sensors, MAP/MAT sensor pressure, turbo speed sensor, and more.

NSX ECU Master EGT to CAN moduleWe will be using an ECU Master 8 Channel EGT to CAN module to measure our exhaust gas temperatures as well as other temperatures using thermocouples.

Motec Lambda to Can ModuleWe are using a dual-channel Motec Lambda to CAN (LTC) sensor with 02 sensors on each bank of our V6 engine.

4 comments

  1. The mid to late 90s in between/early years of DBW had so many weird contraptions. I would love to hear about why certain decisions were made for so many parts on cars!

  2. Excited to see this paired with the ECU Master PMU16! Modern brushless fans and pumps are awesome, both in low power consumption and control capabilities. Let me know if you want another set of eyes on your turbo plans.

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