Drag Racing Discussions > Front Engine Dragsters
FED Build
Larry Gocha:
Thats looking great congrats.
Rat:
When the FED I drive was purchased it had a Master kill switch on the back, but it is on the negative side with the battery forward of the engine . We installed a constant flow solenoid right next to the battery with an aircraft style on/off with the driver. Master Kill key on gives negative, switch closes the solenoid which then powers up the car, tach light comes on to tell me it's powered up. Hit the master kill
or drivers switch and no power right at the battery.
THE FRENCHTOWN FLYER:
I do something similar. It once saved a LOT of people from being injured when I was semi-conscious in a run-away race car.
lake_harley:
Rat....just to make sure I understand correctly, you have a solenoid capable of handling all of the power to the car and it is powered on by a "master kill" switch in the cockpit? If I'm reading right, that master kill switch is wired in series with a kill switch at the back of the car (or somewhere for emergency kill)? Opening either switch (off position) kills all power at the battery cable. I'm curious if there's a reason to put that solenoid on the negative rather than the positive connection? FWIW, my battery will also be forward of the engine.
If I got that all pretty much right, I like the idea that big battery cables wouldn't have to be run to the back of the car and then back forward. That would seem to negate some of the benefit of the master kill switch(s).
In my case, I'll have a starter and wonder if the cable going to it would also be included in the switched (via solenoid) circuit, or would the main lug on the starter still be powered?
Sorry if I seem dense, I just want to clarify what I think I'm reading.
Lynn
Supercat:
I use a "Flaming River" master switch in the cockpit on the left dash, none behind me. Works great. I have a 2 gauge double shielded positive cable to that switch. My switch employs a mag kill switch also. I can take a shot of it if needed.
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