new plugs - couple questions

[rockryno]

Im about to place an order with Pelican for new oil cam tensioner oil lines and thought I would get some other stuff to. Dont know when my plugs were last done so I thought I would get those and a new cap and rotor.

Ive got an 81 3.0L and by the descriptions on the site, I can figure out which to get. However, Im one of the types to upgrade something if Im replacing. Are there any ignition upgrades I can do as far as plugs or cap and rotor while im in there?

Thanks

[Joe Bob]

Stock is best....platinum plugs suck and German wires, caps and rotors are the way to go. Copper plugs....NGK is what I use.

[rusnak]

Only go with OEM Bosch cap and rotor. I also use NGK copper plugs, since the Bosch Super copper plugs have gotten hard to find. This is a good time to clean your battery terminals and grounds.

[rockryno]

cool thanks guys, placing order tonight

[rockryno]

also, mi car call for the WR5DC+ plug. What are the differences between that and the 7 or 8 plug? Firing temp? Im assuming I just stick with the 5 for my '81?

[Joe Bob]

heat range....

The heat range describes the ability of a spark plug to conduct and dissipate heat. Heat supply to the spark plug in the combustion chamber depends on the specific engine type in each case.

The heat range is important because on the one hand, a certain minimum temperature (self-cleaning temperature) must be reached to prevent "sooting" and associated ignition misses, but on the other hand, a certain maximum temperature (auto-ignition range) must not be exceeded if auto-ignitions are to be prevented. For these reasons, the working temperature of the spark plug (operating temperature range) that is set depending on the engine power specified, must be maintained by design within the above set limits.

The heat range of a spark plug is determined by the heat-range code number and must be adjusted to suit the specific engine characteristics. The heat-range code number is a component of the Bosch spark plug type designation.

Low code numbers (e.g. 2 to 4) signify "cold" spark plugs, in other words, low heat conduction in hot engines (e.g. Ferrari, Porsche).