Battery disconnect for the track

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Battery disconnect for the track

Postby 88Allheeze » Sun Apr 02, 2006 4:53 pm

I have mounted my battery in the hatch to get much need space for my ic piping. The problems im having is that when you disconnect the power from the battery with the car running the alternator keeps it running still.. Not good, and the other problem is that i have a stock ECU and it takes so damn long to re learn and calobrate after its disconnected when the engines running. How can i make the car kill (without disconnecting the alternator) the power to shut off but still maintain power to the ecu?
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Postby Razzo » Sun Apr 02, 2006 8:00 pm

you put a kill swtich in the back, take off your license plate, and drill a nice little hole, go buy a 5$ swtich and its track legal. The purpose of the hole behind the license plate is to mount that switch, so each time you go the the track, take the plate off and your set.
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Postby 88Allheeze » Sun Apr 02, 2006 10:15 pm

yea i already have a switch and it hooked up but that wasnt my question
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Postby rightrac » Mon Apr 03, 2006 12:05 am

put a toggle switch on your ecus power... heh that should turn the car off...
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Postby 88Allheeze » Mon Apr 03, 2006 1:00 am

i need the ecu to stay powered or it will take forever to relearn
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Postby Mafix » Mon Apr 03, 2006 1:57 am

i believe you can run dual lines one for electronics with no switch and the other for the starter and alternator.
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Postby exST165 » Mon Apr 10, 2006 11:27 pm

There are some pages out there that describe how to mount a kill-switch that will cut the alternator and kill the engine:

http://www.superstallions.com/tech/elec ... ocate.html

http://www.dapa.org/jhpages/jhandracing19.htm

http://www.mustangforums.com/m_578404/tm.htm

I haven't done this yet so I don't know of any specifics for our cars.

Do you get any grief from the track about battery boxes? Just wondering,
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Postby 88Allheeze » Tue Apr 11, 2006 12:25 am

havent went there since i got the battery relocated, thanks for the links that may help
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Postby ChrisD » Sat May 06, 2006 12:04 pm

I struggled with this for a long time. In the end, it is a pain in the ass because a standard relay won't work b/c of the alternator.

Here is one possible way to get around it. Unplug the plug going to the alternator before you go through inspection. When they hit the switch, it will kill the car. Your car will still run, start, and drive for quite a while without the alternator hooked up. After you leave inspection, plug the alt back in.

You didnt hear this from me. :wink:
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Postby 88Allheeze » Sun May 07, 2006 1:45 am

do u have a problem with the ecu reseting causing the car to run bad for a while? When i was testing out my swtich it took 50 miles or so for the engine to run good again up to the way i had it tuned..
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Postby ChrisD » Mon May 08, 2006 10:07 pm

The ECU does not learn as you drive. No troubles. I pulled a 13.6@102 20 minutes later.
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