Resistor Plugs

[trikebike]

Just read on the net that if you have a performance machine, you should run non-resistor plugs because they flow more current. My 83 ATC 250r calls for a resistor plug, but in all my bikes that I've had over the years, I've always run a B8ES non resistor. So resistor plug or standard plug?

[1984ATC200S]

ive also wonder this, not on my 250R(i wish) but my 340 kawi l/c

[camoweasel]

I have ran the D8EA non-resistor in both my 200X and 350X for years. Both machines call for the DR8ES-L resistor plug. I highly doubt there's any performace advantage of a non-resistor as compared to a resistor type plug. THen again, it can't hurt having just that tiny little bit more of sparking energy right??

[4cfed]

all a resistor plug does is blocks electrical noise. unless your gonna listing to the radio well riding it dont matter..

anyone thats owned a old car or truck knowns the sound.. the whine threw the radio that goes with the rpms

[dajeepman]

all a resistor plug does is blocks electrical noise. unless your gonna listing to the radio well riding it dont matter..

anyone thats owned a old car or truck knowns the sound.. the whine threw the radio that goes with the rpms


Last time I checked that has nothing to do with the spark plugs.. it has to do with the Alternator..... because the way it generates electrical noise.

You still hear it in todays vehicles with after market stereos... they make filters for that you intstall in the positive wire to filter out the noise.. im not a stereo nut i knew this from automotive class.

[MonroeMike]

http://www.allpar.com/fix/spark-plugs.html

Today's spark plugs use resistors to eliminate radio frequency interference (RFI) which can affect on-board computer systems, AM and FM radio reception, TV broadcasts, and even airplane communications. Each time the spark jumps across a gap, an electromagnetic field is created that can interfere with radio signals, by placing a resistor in the spark plug, we can substantially reduce RFI. Furthermore, the use of non-resistor plugs with today's complex computer systems can result in drivability problems, loss of performance and can even cause the computer to store trouble codes. The same can be said about using resistor style spark plug wires.

[JustEnough]

Here is what NGK has to say:

Resistor plugs for race engines

It is strongly recommended resistor spark plugs be used in any motor that has on-board computer systems to monitor or control engine performance. Use of a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion. Resistor plugs are also recommended on any vehicle that has other on-board electronic systems such as, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.

If you have an outboard marine CDI (capacitive discharge ignition), (such as Johnson and Evinrude), make sure to use a plug with an inductive type resistor (such as a NGK Z-type). Inductive resistor plugs require less voltage than a monolithic (regular) resistor plug. Use of non-inductive resistor type plugs on these motors can create an open circuit within the spark plug (it will become a dead plug).

Mallory, MSD, Crane and Accel also produce a high output ignition CDI system, however, these should not be confused with a marine style CDI as mentioned above. For an automotive high output CDI system it is imperative you consult that manufacturer for plug specifications for their system. Some high out put systems specify the use of resistor plugs, while others will fry the internal plug resistor turning its 5k ohms into 60k ohms.

As a rule, performance is in no way impaired by resistor spark plugs. The only exception to this may be some models of high output CDI specify non-resistor plugs.

Resistor plugs for race engines (http://www.ngk.com/charglossary.asp?kw=Resistor+plugs+for+race+engine s)