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If you use the FBO plate with a correct 340 dual point for the purpose of increasing the initial timing, then you can, and should, bend the secondary spring perch out. The secondary spring loop should contact at approximately the same rpm as it does now. How it works is explained in another...

Factory Service Manual has the diagrams. Trace or copy the circuits of interest. If you mean the horn contact in the steering wheel, IIRC there is a feed from the horn relay. It goes to the steering column connector and then to the horn switch. When the switch is pushed, the wire is grounded...

It's not odd. Take a look a some other multi-terminal connectors - like the ones on the bulkhead. Unless the vehicle is fully optioned out, some positions have no wires on one side and some positions have no wires or terminals on both sides. Same part used for different purposes saves money...

Top of the pentagon connector is power for the ECU When the distributor signals the ECU, the ECU connects its left pin (black and yellow wire in diagram above) to ground. That's all it does. Works same as points closing. Give that battery a long slow charge. it should be around 12.6 to 12.8...

I beleive that by '84 Chrysler had changed to ECU's that no longer required the 5th pin and 5 ohm resistor to control power for running the ECU. The plug was never changed. it may have the 5th ire removed. What wire did you touch to ground? If its the controlling primary wire (connected to...

The neatest labels will be the ones Dana posted. IMO they will not last that long. But just the process of labelling may help you remember how its hooked up. When you label, spend some time with the wiring diagram. That way you'll really learn how the circuits are connected up. The system is...

The factory oil pressure sender and gage used the IVR. The replacement senders do not seem to have the same calibration as factory 60s and early 70s senders.

Just to be clear, flow is electrons moving. Voltage is potential energy. For example, this shows current flow immediately after starting. The power source is the alternator. The ignition, alternator's rotor, and the battery are drawing power through the paths shown. If the alternator is...

A. There is no fuse on the ignition circuit. B. Amount of voltage drop depends on both resistance and flow. Resistance x flow = Voltage drop You can't check for resistance without knowing how much current is being pulled and the route the current is taking. Also measuring to ground can be...

The only way for backfire or popping will be heard through the carb is when the fuel-air mix be ignites before the intake valve fully shuts. Since it only happens when starting I would first suspect the initial (AKA base) timing is too far advanced. With a mechanical (solid) lifter, it may be...

The grass always looks greener on the other side. LOL Pretty much anything from the factory was built to hold up for the service life. Finding a legit original spec HEI module is like finding a legit original spec ECU, or Duraspark or you name it. On the opposite pole we can look to the one...

https://www.forabodiesonly.com/mopar/threads/wire-harness-tape.306335/post-1970742782 https://www.forabodiesonly.com/mopar/threads/vendor-needed-for-cloth-fabric-tape-non-adhesive-type.457581/

Ha!

That sums it up. Same coil AFAIK.

Dang that's expensive. What happened to your project? Was the issue too expensive to get it made out of a material that be strong enough?

"Internal Combustion Engines and Air Pollution" by Edward F Obert You can also read the various snips from Obert, Larew, and Taylor that Tuner and Shrinker in particular have posted and explained on a few forums, which some of us here have referenced in the past...

These has been answered, and you agreed. So now why are you asking again? All I can guess is you don't understand how the the different advances work and what you can and can't do with them. Since you want to buy an answer, then either buy the FBO system and do whatever Don says, or buy...

This is what it boils down to, doesn't it. If a campfire is built properly I can light it with flint and steel. Using one of those extended butane lighters won't hurt but unless there are some adjustments to the build, its not going to help get the big logs burning quicker, and the end result...

Only if there is a problem (resistance) with the power feed from the alternator to the main splice. A relay is an electrically powered switch. Installing a headlight relay uses the original headlight circuits (hi & low) to connect the headlights more directly to the power supply. A circuit...

I haven't studied this. I think if you just disconnect the module as @townsend wrote then the light will be off. My question is whether that then requires the over ride switch to be activated before starting the car. If so, that switch's wires can be jumpered.

Thanks. The Sun Distributor Testers have their tachs in distributor rpm. Works off a signal from mechanically driven contact points - as long as they don't stick - so its one distributor rev per pulse. At least the ones I've seen - which are older. Also have two scales, one for low rpm range...

I had similar thinking at one time. Eventually I learned the Chrysler team was a lot smarter and knowledgable than most enthusiasts, and that includes many racers. (On the other hand I noticed class racers tended to pay attention to factory info and put it to use. But I digress) Here's my time...

You'all think the freshly minted junky cheaply made parts are limited to mopar stuff? :rofl:

This is basic info for some and maybe new for others... Voltage to fire (jump the spark plug gap) depends on the conditions at the gap. If conditions are such that 12,000 Volts will cause the spark, then that's what happens. It doesn't go higher. Once the spark has begun, then the voltage...

In the video, I assume the Allen's tach is in distributor RPM. So double that for crankshaft speed. (edit: crossed out because its incorrect. See Newbomb Turk's reponse below) 'Larger spark'. A spark that can initiate with a larger spark plug gap has potential to create a larger flame...

Part of it is the power supply. Answer this. What is the max voltage the battery can supply power at? What is the normal votlage range for the alternator to supply voltage at? Up to the welded splice current from each follows a different path. Test for resistance in each using voltage drop...

MSD 6 series instructions from Autotronics marked up. Starter relay wires should not have been involved. Original coil wires removed from the coil Former coil feed wire (brown) is used to switch the MSD unit on. If using the original points distributor, MSD white wire is connected to...

Cranking is NOT related to the ignition wires. Or rather, it shouldn't be. Cranking is the Start wire. S2 (yellow) on the diagram. Goes from the key switch S terminal to the Starter relay terminal. How the Starter Relay Works Key in Start. Power is available through the key switch (S) to the...

yes

That's the rally dash ground and I don't know if the '70 used the same. The other end attaches to the strut support for the radio. Yes. Behind the kickpanel was another ground wire which connects to the heater core...