[Diy_efi] Re: OT - platinum plugs burning up wires (Rick McLeod)

[Stuart Hall]

>I have to agree on the turbo w/ plat's, I have 4
>gas/turbo cars, and ALL of them (3 Volvos and a GM)
>HATE plat's, stock OEM plugs w/ large electrodes seem
>to create the best light-off of the mix under higher
>boosts, which relates to higher compression. I don't
>have a 'hi-comp' engine to relate to (my GM v8's are <
>9:1) and plat's weren't around when I built my 10.5:1
>GM BB nearly 30 years ago, so no experience there, but
>would be interested to hear what folks running hi-comp
>have learned.
>
>Thanks, everyone, for the great disscussions so far.
>And, what's even better, no flames! Thanks

Hey guys, my first post here so I hope I get this right!

I drive a 1990 300ZX NA and if memory is correct it has a reasonably high 
compression ratio of around 10.5:1... the factory plugs are platinum and a 
sticker under the hood says to only replace with platinum plugs every 
100,000ks... so I guess they last longer than regular plugs, and work in 
high comp engines, but I think the ignition circuit is probably different 
for them, if there is an actual resistance difference as people have pointed 
out here... the Z engine has individual coil packs on the top of each plug, 
so no real high tension leads to speak of either... not sure if this all 
helps anyone or just causes more confusion :p
cheers,
Stu