BanjoReid

iTrader: (1)

I am swapping a LQ4 carb T56 setup in my 72 Nova.

I drew a schematic so I can wire my car. The circuits are: Start, Charge, Ignition, and Start.

I would appreciate it if I could get a second set of eyes on it for review. I do not want to fry anything or catch the car on fire.

I posted this in NEWB Tech yesterday and did not get any responses so I am posting it here. If I am in the wrong location then please point me to the correct location I should post this.

Thanks!

pdsq98gt

Make sure the ignition is hot in run and crank. Or else it won't spark while you're cranking.

EFIHARNESS

Do you want 10+ amps going thru your ign switch.How is the relay wired ? If the fuel pump power comes from the cb than the control circuit needs <1 amp protection.
In the alt control circuit the resistor goes to ignition or you will discharge the batt with
the engine off. Steve

1964SS

iTrader: (1)

You don't have the pins labeled on the relay so I can't tell you if it's correct or not, but assuming the top wires are 85 and 86 for the coil and the bottom are 30 and 87 it's correct.

BanjoReid

iTrader: (1)

I am going to confirm the circuit continuity for this. I don't want to drop fuel and spark when the key is switched to crank.

BanjoReid

iTrader: (1)

1964SS, you are correct in your assumption. I didn't label the poles.

BanjoReid

iTrader: (1)

Steve/EFIHarness,
For the time being I am only running two circuits (Fuel relay & MSD ign), so yes I am okay with running that through the ignition switch. Long term, once more circuits are added I will change the design.
From your other two sentences I am gathering you are saying.
1. I could safely get away with a lower AMP fuse in the fuel pump relay control circuit?
2. The ALT circuit, the resistor is for the ignition input wire and the voltage-sensing wire. I am confused by your statement of discharging the battery.
Thank you for your reply!!

Suncc49

On your fuse block, there is a IGN spot open, use that for the 12v crank source...

Doing a turbo 72 nova myself as well

EFIHARNESS

On the alt circuit, yes to the ign and not to battery. On relay control, the only current you are drawing is the coil in the relay (<1/2 amp). Steve

tfi racing

iTrader: (2)

I would bring the feeds for the alternator and ignition switch to the battery positive end instead of the starter terminal.Shorter,less hassle and keeps them away from the exhaust heat.You may also want to consider using the Ford remote solenoid trick to help with hot cranking.

BanjoReid

iTrader: (1)

Thank so for the replies.

The battery is in the trunk and cable is already routed. Thank you for the info on the alternator drawing power with the drawing I did. I have corrected it and if anyone wants it for future reference can upload the new schematic/ diagram.

This overall isn't going to be permanent, just temporary. I have to move in a a lil over a month and would ideally like to have my car moving under its own power.