distributor cap and rotor tip heating up melting and can't figure out why

[Mike67]

Sound like you have some high impendance...what plug wires are you running?
There is something that is causing a high enough amp draw to cause both the cap and rotor to melt.
Over voltage (coil) will usually cause tracking but not melt the cap...double check your gap, plug wire connections and get a quality cap/rotor.

 

[MOPARENT]

This might be worth a try...cheap napa parts like the rotor button have to be tapped down on the shaft....they don't fit like they use to...

 

[Don Gould]

It's got high Resistance in the system somewhere, plug gap to wide is common? increasing the gap will make the problem worse. If your using the Summit old 60's resistor type ignition box its dragging the timing backwards by 8* or more under load. The Blaster coil is for CD Ignition system and your system is an Inductive system. The Blaster is a converter type coil which gets a 440-480V hit from the capacitor (CD) and converts it to 40KV to fire the plug. You have a classic mismatch of all Chinese parts. Are you trying to use a cap with Aluminum contacts?
A ballasted inductive Ignition system is designed to run on a 6V coil with ballasted power of 5.5 to 6V at the + side of the coil. CD Ignitions run No ballast and will run Battery voltage 12-14V as a power source magnified by the Capacitor to 440V.
The HRR688 ECU is a completely computerized Ignition system like no other inductive system, it runs on full battery voltage to the coil... more power in more power out.
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