Wiring gas relay to HEI dizzy

[BASSYK]

i am looking at fitting a HEI dizzy5(one withe the coil inside the dizzy) to my 308 , the only problem i can see is that the gas has a pick up wire off the coil so that it only pumps gas when the coil is powered (engine is running)

how would i wire this to a HEI dizzy so that it isnt pumping gas as soon as i have the ignition power on , is there somewhere else i can get power from only when the engine is running?

[pongo]

a hei dizzy ( on a chev anyway) has 3 wires. tacho, power and gnd. just use a test light to check if the tacho wire is what your after.

Anyway. if the fuel pump runs when the motor isnt running, it should be ok , considering the fact that most of the fuel runs into the over flow anyway.

cheers

[BASSYK]

a hei dizzy ( on a chev anyway) has 3 wires. tacho, power and gnd. just use a test light to check if the tacho wire is what your after.

Anyway. if the fuel pump runs when the motor isnt running, it should be ok , considering the fact that most of the fuel runs into the over flow anyway.

cheers

thanks for the reply

the ones i have looked at only have 1 wire to hookup

also i am running straight gas (LPG) not petrol , that is why im wondering if there is a problem with having the gas running while only the ignition is on and the car isnt running

[pongo]

ahh for straight gas. Peice of piss. gas usess the vaccumm off the motor to draw in the gas . all you need to do is simply hook up the safety cut off solonoid to Ign+ so it only comes on when ign is on . and thats it. all it is is a simply relay . thats the wire i use for my kill switch.

Cheers

[-Scott-]

No. It's a little more complicated than that.

DO NOT hook your gas solenoid to ignition. If you have an accident and stall your engine it creates a SERIOUS hazard. Do it properly.

It's a similar argument for electric fuel pumps - after an accident you don't really want the fuel pump to be pumping fuel out of a fractured fuel line.

Scott

[Loanrangie]

I was thinking the same thing for when i fit my hei dizzy to the rangie, i think the tacho pin will be the right one - gas controllers usually connect to -v coil terminal. You want the solenoids to be shut off when the engine dies.