Full-out racecar with no factory wiring / no key to turn car off.

What is the right way to turn off car?
A) Kill ignition Only
B) Kill ECU
C) Kill injectors Only

 

Are you still using an alternator? If so you need to cut power from the alternator because the motor still turning is back feeding from what I gather. I'll try to find a diagram as to how to wire a proper kill.

 

I am not talking about the kill switch, I am just talking about when you drive the car say on to the trailer or into the pits. Is there is right/wrong way of turning off the car?

 

If you have a switch panel, and have fuel pump and ignition wired, kill them both. I normally kill ignition before fuel if anything, but try and hit both switches at the same time.

 

It doesnt matter.... which way..... but i kill the ingition first just out have habit

 

IF you drive a rotary make sure you free rev it at least until the shiftlight comes on somewhere usually about 10K, then turn the power off. Well thats what i have gathered from those guys at the track.

In seriousness, theoretically i could see maybe a good idea to do ignition first but from an idle i cant possibly see a issue with shutting the fuel pump off although it may take a moment for the car to shut off, but the ignition should be instant.

 

My track car has a main power switch on the switch panel that feeds the following switches and buttons.

ECU, Fuel, Fan, Air to water pump, and push button start.

To turn the car off i simply turn the main power switch off on my switch panel.

I still have a battery cut off on the back bumper, but i find it easier and safer to just have another kill switch on the dash in case something goes wrong and i need to shut it down quickly

 

Mine was the same way, I had a large solenoid that cut all power with a switch on the panel

 

I'd kill ignition/ecu first. If you cut fuel you run a chance of running lean.

 

ign. then fuel.

 

i hit em both at the same time.

 

HUH?

 

you guys realize when you kill ignition power your ecu will also shut off.
When the ecu shuts off both spark and fuel will stop. Even if your fuel pump is running, injectors are closed. you should have the ecu controlling fuel pumps this way they also shut off..

Running lean from shutting off the ignition is a pretty funny comment.. lol...

shut the car off by whichever method makes you happy.
Plug up your exhaust pipe if you want... lol

 

lmaoooooooooooo

 

So if i kill the power to an msd it it will shut off the ecu even though the key is still on........ lol

 

no ignition power.. switched 12 volts...

 

???

 

tepid 1 did not say killing ingition will make it run lean...... he said shutting off the pumps will cause it go lean... which is correct.... but at idle will cause little to no damage

 

Well then rather then all the confusion, lets use one switch to turn off a race car.
let's call it the ignition switch ok..
Make sure your MSD and ECU both have the ignition power wire also hooked up to this same ignition switch..
It would also be recommended to have your ecu control the fuel pumps as well.

Now when you want to turn off your car you can simply just turn off the ignition switch and your MSD, ECU and Fuel pumps will all magically turn off.

No need to worry about leaning out engines, which switches to turn off first or trying to turn off multiple switches at the same time...

 

Sorry to make such a big thread over a little thing I was just worried about hydro locking the engine kill only killing the ign, but with what was said above me makes sense now.

 

Lol

 

independent switches for EVERYTHING FTW

 

WOW!!!! The level of stupid here has reached an all time high

 

Oh come now...people all still need to learn

As Enzo states, dont over think it...have one main switched 12 volt power source just like factory, and have all of your electronics that need 12 volts powered off this switched Igntion (by Ignition, he means the KEY IGNITION, not your spark ignition)

 

Learn?

**** I have this magical device that has worked flawlessly without a hickup. I dont know who came up with it or even how this thing works. It has never let me down or caused my car to run rich or lean while shutting the car down. I dont know what I would do without it. I am simply amazed at how it works. Please go out and pick yourself one up ASAP.
























































Its called a key............ It works wonders..........