I ordered my usual preferred NGK spark plugs for my '80s Saab 900s, and I received the kind with a resistor in them, which my usuals don't have. I haven't been able to find much on the web about whether this matters -- just one forum post about how the guy's car didn't run well (but who knows how he gapped them, etc.). The vendor also told me that the ones I ordered have actually been superseded to the resistor versions.
Electrons are hard for me to see, and they move quickly. Lacking a decent understanding of how a resistor in a plug might affect spark, I'm asking here: should I care? If it matters, both cars are turbos, with old-school coils/distributors.
NGK has discontinued all non resistor plugs. If they seem to work less well replace your high tension wires with solid metal core wire and you will overcome the excess resistance.
I don't recommend solid wires on anything that has electronics.
You can expect poor results.....
High voltage does not behave the same as low voltages, that 10 or 20k suppression wire looks like a welding cable to high voltage!
https://www.magnecor.com/magnecor1/truth.htm
All right, well, I'll give 'em a shot. Thanks for the responses.
My 924 uses resistors in the plug wires, which makes them expensive.
So the trick is to use generic parts store ignition wires with resistor plugs of roughly the same spec.
It also gets you away from the smaller tips.
