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Project Civic Racecar Waits for Tech Inspection
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Project EF Civic Racecar: Witchcraft & Wizardry

  • Dave Zipf
back of the Pyrotect master switch showing all of the wiring for the battery/alternator, the EFI cutoff, and the alternator dump circuit.
You would think this would be an easy fix, right? The car already had a kill switch; just remove it and install this one. Wrong. The previous master switch had breaks for the battery and alternator. This is an acceptable way of cutting power to the engine: with both the alternator and battery isolated from the engine, there is no power to run the ignition system, and that will kill the car. The problem is that many kill switches are not rated for the high current of an alternator, including the Pyrotect switch. Instead, we rewired the alternator back to stock and added a cutoff for the ECU. We also added an alternator dump circuit, as this switch had a set of terminals for it. Finally, we added terminal covers for the battery lugs to remove a short risk.
The alternator feed wire has been extended multiple times and done in an unreliable fashion. Multiple short pieces of wire are badly soldered together and insulted with flaking electrical tape. This is very unsafe.
The alternator normally feeds into the fusebox and then to the starter motor, where it meets the battery. The alternator feed was extended to the interior for the kill switch and then routed to the fusebox. This was part of the extension from the alternator to the kill switch. Yikes.
The repaired alternator feed wire is much cleaner looking. It also has proper crimp splices that do not fatigue the wire over time.
We cut out the mess and shortened it to reach the fusebox as Honda designed. Ideally, we would have removed this and replaced it with a new piece of cable, but that would have required removing and unwrapping the whole wiring harness. We used a crimped butt splice and shrink tube instead of solder and electrical tape. Much more reliable.
The fusebox with the repaired and OEM routed alternator feed wires.
Our new alternator should be much happier.
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  • Civic
  • Honda Civic
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  • EF Civic
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1 comment
  1. Arnie says:
    April 29, 2025 at 5:34 am

    What happened to the retro rx7 article with the new shocks article ?

    Reply

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