Ok this may seem like easy answer but i know the way i have my switch hooked up is not the corect way.I have tried diffrent ways to do this and to get my car to shut off when the switch is thrown but it always keeps on running,the only way i can get it to stop is if i hook up my ignition box to the switch only and just shut it off so the car dies but there is still power to the car. just not the ignition box i know this is not corect.If i hook up my battery to the switch and the ignition box and the altanator on one side and the then go directaly to the battery on the other side when i flip the switch the car still runs, this would seem to be the way it should be everything on oneside and just a cable to the positive side of the battery on the other side of the switch.Flip switch cuts power to everything.But it does not work. graemlins/clonk.gif

The alternator will power the car even if you kill the battery You need to run the output of your alternator directly to the battery side of the switch so the switch cuts the alternator power, too.

yeap, the alternator wire needs to go to the hot side of your switch (same terminal as your battery + cable goes to) and everything else to the cold side of the switch....when the switch is fliped, it basically isolates everything from the alternator and battery so the car stops running.

good luck.

Just more NHRA "B/S".

I suggest putting a circuit breaker or fuse on the battery wire. That way if it grounds out the fuse/breaker will open the circuit and avoid a fire. I have a 100 amp CB on mine.

"Just more NHRA "B/S"."

Harold ... you would not be saying that if you were sitting upside down in your race car after an "incident" with fuel running all over you, wishing that somebody would turn off the fuel pump :eek: Also, it gives starting line personel a means to shut of a vehicle if they see any major problems that could endanger the driver, such as oil or antifreeze leaking under the car.

Safety rules are not B/S and should never be treated as such. It is obvious that you have never seen anyone get seriously injured at the race track.

I will try to hook it up this way and see if i can get it to work corectly.I was black flaged at my track because it did not shut off my tach lite and they said i had to get it fixed since it did not cut power to the hole car.

Thanks for the help HEHEHE

BillK, I'm only saying in 40+ years of spectating iv'e never seen this condition occur in average type cars. Fuelers, Alcohol cars and fast bracket cars yes, but slow bracket cars and slow stock class cars i think it is overkill. Most people put fuel cells in any more to avoid fuel spilling all over you in case of an accident. A dragstrip is a much safer environment than any city street as everybody is paying attention and not driving along in a daze as your average commuter is. Just don't think there is much chance of crashing at the strip in an average car.

Harold,
I have probably made over 3000 passes down the 1/4 mile, and I assure you, I have seen more street and mild bracket cars on thier roofs or into the guard rail than I have fast cars.
The guys with the fast cars are much more likely to have all of the proper safety equipment and have the maintainance done on thier cars to prevent stuff from happening. A lot of street driven cars today are faster than most race cars were when I started racing in 1971. The safety has to be there. If you want a race car, then you should be willing to do whatever is needed to ensure the safety of yourself and everyone around you.

Bill, I've watched thousands of passes here at Tulsa and have only seen three cars get upside down in the last 30 years here. These were all fast cars and resulted in two deaths but nobody caught fire. One guy hit an enbankment and another rolled several times and his helment came off and beat his brains out on the roll bar. Accidents do happen and generally aren't pretty. Frankly though i don't see how relocating the battery necessates the cuttoff switch while keeping it in the front doesn't? All the engine/car related fires iv'e seen were caused by oil getting on the headers or carburetor backfires related. Never seen a rollover cause a fire, ever!