Help needed

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Ozcuda

Ozcuda

gotta love a MOPAR
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HI Guy's,

ok just about to fit a new fuel system with an electric pump I have been told I need to fit a safety shut off switch in case of a accident.

I have been able to find 2 different kinds & was wondering what 1 to use

The first 1 is a oil pressure switch which cuts the fuel when the oil pressure drops below 5psi

The second is a electric switch I am not sure which 1 to use.

So my question is what are other racer using ???

Thanks Oz
 
Electrical Shut off switch. Moroso 74102 ,or equivelent .
 

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Abodybomber said:
Electrical Shut off switch. Moroso 74102 ,or equivelent .
Click to expand...

tqfastfish said:
x2^^

JEGS electric shut off switch with chrome nameplate
Click to expand...

Thanks guy's,

I think I don't think I gave enough info. I need a switch to stop the electric pump fuel pump from running in the case of an accident.

From what I read these switches are to cut power from the Alternator

Or is there something I'm not seeing

Thanks again Oz
 
Those two switches mentioned above is what you need, we'll you need only one of them, so, take a pick.
 
Sounds like your talking about a "inertia" switch that shut's off the power if you get upside down. I've never used anything like that, but if it's required for your sanctioning body, i'd ask some other racers what they are using.......I believe some newer cars come with a setup like that, but I have know idea where to send you. If I run across something, i'll let you know.
 
I use an oil switch that shuts off the grounds to my two relays. One is for my fuel pump the other for my ignition box. Once the oil pressure drops below 10 psi I'm safe. Plus I have an override switch for quick starts and to diagnose problems.
 
OldmanRick said:
Sounds like your talking about a "inertia" switch that shut's off the power if you get upside down. I've never used anything like that, but if it's required for your sanctioning body, i'd ask some other racers what they are using.......I believe some newer cars come with a setup like that, but I have know idea where to send you. If I run across something, i'll let you know.
Click to expand...

http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=30823

View attachment 900-240_1.jpg
 
If it's an inertia switch - don't know about in Aussieland but Fords here have had them for years in the trunk. You might be able to scavenge one easy enough and it's wired into the fuel pump relay circuit.
if this is for sanctioning body - the Master cutoff is used in the US. Has to be clearly marked and mounted on the rear of the car where it's accessible regardless of vehicle orientation.
 
Thanks everyone,

Looked at the options you have talked about & looks like the oil pressure cut off will be the easiest for me.

I have a battery isolator switch already

Thanks again Oz
 
Around here the older Ford Ranger inertia or crash switches work well. I haven't kept up on what all OEM apps are easy to get, etc. Just wire it in series with the power to the pump relay
 
the moroso switch is all you need if this is a safety rule. a oil pressure fed switch will only cut off the fuel pump if the motor loses oil pressure, or the engine cuts off. you could have a wreck where you are trapped in the car, with the motor still running, and a fuel line gets pinched enough to start leaking some fuel. at that point, the fuel pump will still run, because the motor is running the oil pump. unless I'm missing something, what I'm seeing is that you are going to an electric pump, and need to be able to have it shut off in case of an accident. the way this is done, is you run your battery cable to one side of the switch, and then make the long run to the front of the car with heavy battery cable, from the other leg. connect that side of the long cable to a Ford solenoid, or some other source that can be used as a means of pulling power for all the electrical components in the car, such as your fuel pump switch and or relay. now, the only way that the long battery cable gets power to the fuel pump, is if you have the master switch on. if you had an accident, and were trapped in the car, track officals could run to the back of the car, and cut the master cutoff switch off, thus killing power to the long cable that feeds the fuel pump.

everything on my cars gets its power fed to it at the front of the car. the fan, electric water pump, ignition, starter, headlights, and anything else electrical. tha way if you have an electrical fire, or similar emergency, you kill everything on the car with the flip of the mater switch.

sorry if I'm missing something, but I think that will get you legal. good luck.
 
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