Motor Swap 1975 W100 - Page 3

zachman1767 · #21 03-17-2009, 12:43 AM

Thanks man. I appreciate it. I think I need to get the right motor mounts that bolt on the side of the block. If you know of where I can get some used please let me know. Bouchillons wants 70 bucks a piece for them, and I'll just weld and drill the ones I have for that much money. I think theres some on ebay for a 1972 truck, which I think is the same. There at 25 bucks right now so I'm lookin at those, but the faster and cheaper the better. Once I get the truck running ill post some pictures.

Zach

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zachman1767 · #22 04-17-2009, 01:08 AM

Hey guys,

I am having some electrical issues with the electronic ignition on my 1975 dodge w100. It had a fuel injected 318 that someone put in it, but it was blown up. So I bought a Mopar 400 that was in a dodge pickup and dropped it in my 75. I wanted to use the electronic ignition which uses the 5 wire ECU and the dual ballast resistor. I wired up the ignition the way that the diagram I had showed, but when i try to start the truck theres only 9 volts at the coil. When its in the run position theres only 3 volts.

Could anyone tell me what the resistances on the ballast resistor are supossed to be?

Also, why did dodge install the dual ballast resistors on the electronic ignition models, i thought they were for points only so you don't burn them up when the truck is running.

Also if anyone knows how I should wire up the alternator and voltage regulator that would help me out alot too.

Any and all information will be helpful.

Thanks Guys.

Zach

zachman1767 · #23 04-17-2009, 01:10 AM

Also,

Does anyone know what size carberator will work well on a dodge 400? It has a carter on it right now with vacuum secondaries but i dont know the size and im thinking about getting a new one.

Thanks

Zach

SEAL · #24 04-17-2009, 06:34 PM

The ballast resistor is there to save the coil according to the Motors manual. It didn't list the resistance but said if a problem was suspected replace the resistor. Sorry but that is all I can tell you.

rtaylor · #25 04-17-2009, 10:00 PM

the 400 engines came with carter thermoquads, they were rated at 800-850cfm due to the large secondaries, a 750 cfm eldebrock would work very well on a stock 400....

rtaylor · #26 04-19-2009, 02:43 PM

go with a eldebrock elec choke...........good carbs

Mad Mudder · #27 04-19-2009, 10:38 PM

Why not a good old Hollie?

zachman1767 · #28 07-07-2009, 08:30 PM

Thank you!

Does anyone know where the drain plug is located on a NP-203 transfer case? I cannot seem to find it anywhere and I'd like to change the oil in it.

nemesis_SS · #29 07-13-2009, 07:20 AM

did you solve the voltage problem? like SEAL says they resistors drops the voltage once the car is running. i figure it should be more like 12 at start and 6 when running. could be wrong. another things is if the coil has a built in ballast resistor it might mess things up

zachman1767 · #30 07-19-2009, 04:08 PM

Do I need the ballast resistor if I have an accel super stock coil? I have the ECU hooked up and it was working, but now all of a sudden I have no spark. I wonder if I was supossed to hook up the dual ballast resistor to limit the voltage to the ECU. Do you guys know anything about this. Could I have fried my ECU or distributor?

Thanks,
Zach