QUICK SPECS

Estimated Time Of Completion: 10 Hours
Material Used: eSun PA-CF
Products Used: Fusion 360, Creality K1 Max
Number of Revisions: 8
Difficulty: Medium
Ease to Mass Produce: 6/10 (Large print/only able to do 1 at a time)

Mounted in the OEM Location behind the kick panel. Harness kicks out perfectly for an angle to fit underneat the plastics.

The typical way ECUs are ‘mounted’ in civics is to simply lie it on the floor under the carpet. The OEM mount is behind the passenger side kick panel keeping the ECU away from errant feet kicking it and damaging it.

Currently, there really isn’t a mounting solution for haltech ECUs for Civics and Integras that places the ECU into the factory location. The biggest issues are that the jumper harness itself is large and bulky, and difficult to tuck under the kick panel, and the ECU itself has no holes that line up with the factory mounting locations. Furthermore, The external wideband box that is very commonly used in these cars is usually just tossed around like a second thought.

Empty mount showing the design features required to strain relief and weight/material savings.

My idea was to simplify the entire setup into one package that can be installed and removed all at one time, while still mainting fitment underneath the OEM plastic kickpanel. I started by modeling the jumper ECU header, a large rectangular box. the Box itself is together by 2 screws. Originally I had planned on some sort of press fit, or clipping solution, but ultimately decided on building those holes into the design, so the end user only has to simply undo the screws, place the jumper in the slot, and put the screws back in through the holes allocated on the jumper. There is added strain to the header from the wires wanting to lift it up, to alleviate that, I cut reliefs in the mount to allow for a zip tie to hold the harness down and keep it from pulling the header up. Making it a very safe, reliable solution.

A big issue I ran into on the initial design was that the harness itself on the right side of the header kicks out a lot to the right side. I designed a relief on the WB1 Wideband mount to allow for the wires to pass through unimpeded. A simple, eloquent solution.

Design considerations:

Durability against High Frequency Vibrations
Material Usage while still maintaining rigidity to speed up print time/reduce waste
Fit underneath the OEM kick panel for clean install
Allow clearance for accessories to be easily accesible like the integrated barb for the MAP sensor and the door for the USB port and external CAN cables.