DeTomaso Mailing List: June 2001, Message #61

In a message dated 6/2/01 5:37:10 AM, cmarsh@zbzoom.net writes:
snip....
>the lower resistance (of helical-wound wires) sometimes results in radio 
interference.  Since the automakers liked the more reliable spark provided by 
helical core wires (for low emissions) but also wanted to sell radios in 
their cars, the spark plug manufacturers began putting resistors in their 
spark plugs (It's now difficult to buy a non-resistor plug!)>

another reason for all this is that late model fuel injection ECMs are quite 
sensitive to sparkplug "noise" and some will shut down the engine if 
sparkplug wire resistence is too low. Something to keep in mind if you 
convert your 351C to aftermarket F.I.... My 2¢- J DeRyke