Here’s an interesting electrical question/poll.

[Pete Munroe]

I have a "inertia" activated switch mounted on the chassis upright just in front of the drivers door.

Wired it to shut off the power to the Holley electric pump in the left rear wheel well. Activated by impact ( inversion also I think). They must be mounted to something solid, like the frame...not something that can move and absorb impact before the switch gets tripped.

Installed it where I could reach to reset it (push a button on the top) as I had no idea how sensitive it would be in the car. It has never tripped. ( has been installed for 13000 miles and 10 or more track events).

This switch is from Pegasus Auto Racing Supplies, part #1108 about $65~. It comes with electrical plug, wiring, terminals and bracket.

You can get them for much less money, but then you have to have the "plug" to finish the wiring. Almost got a Ford Tempo switch for like $15? and then realized I couldn't easily get the electrical plug as it is part of the wiring harness in the car. If you took one out of a junkyard car you would have the plug I guess.

My "main kill switch" shuts off EVERYTHING. Nothing stays as a "hot" circuit.

The main-kill switch is behind the passenger seat. Good for security, not so good for the track.

Pete