Better SPARK PLUGS for HD 103cc motor?

[Lizard]

One thing I don't think that has been discussed or addressed.....typically we measure resistance with a low voltage ohmmeter. Your typical Fluke has a 9V battery and no step up transformer, so the resistance is measured with that low voltage/low current source. The coil output is MUCH higher, something like 40kV. The plug wires will react differently (just like you would) to the 40kV, as opposed to the 9V. As they get older, the wires will tend to arc internally, changing resistance (lowering) when the 40kV is applied. They will not necessarily show lower voltage to the smaller output of a DMM.

 

[msocko3]

Man, this is making my head hurt. This is just the layman's way of explaining it. Trust me, there is a lot more to this equation than I can possibly explain and I hope what I have explained can be understood.

I'll bet your fingers are sore also. I got the gist of it.

 

[iaff84]

I'll bet your fingers are sore also. I got the gist of it.

Out of my pay grade! but thanks, I am more confused but I will cope.:laugh:
Glad I do not have to retain all that stuff but love it when I turn on the key and all comes together as I ride down the road.
Dennis

 

[Mr.Wizard]

Sorry guys.... explaining how the many facets of ion sensing are all related can be as exciting as watching paint peel. It's funny to see how this thread evolved from asking about upgrading to a plug to getting semi technical as to why you shouldn't. Change your plugs every 5k miles when you change your oil. What is the cost in relation to a quart of your favorite oil? Peanuts. Change the plug wires each time you change tranny fluid, 20K.

Now, if we all listened to Jack... we could have all saved a bunch of time and typing.

There ain't anything magic about spark plugs....

As for Lizard... the guy works with electronic measuring devices and travels the country doing so. Tough job but someone has to do it. He may be one of a handful of guys here that can understand the links I pasted.

M3... if you are having difficulties wrapping your head around this, call me. My fingers will thank you.


So... OK... I have a question for all of you. Who was the first racing engineer to work with and develop the porcelain electrode insulator for a spark plug and when did he do this? No, it wasn't Helen Bartlett, she was 30 years later... and stop trying to Google it.

 

[Lizard]

Was it perhaps in 1902? I googled it ;-)

 

[Mr.Wizard]

Was it perhaps in 1902? I googled it ;-)

That's one part... now for the second part.

Who was it?

 

[Lizard]

I got that, I was providing a hint to let someone else answer. He worked for the Auto Car Company, another hint ;-)

 

[DK Custom Products]

Wiz,

Thank you very much for the info. Got a couple more questions, but have been slammed the last few days...should have some time in a few days.

Also, will post my findings on OEM plug wires and SE plug wires from time at the dealership.

Kevin