First I've been reading up on plugs all day long and haven't gotten an actual answer to my question so I will ask.

Why are the resistor plugs considered to be a better plug over the regular plugs like the BKRE9?

Is one style better for different setups, ex. coil on plug setups works better with x plug where stock distrubitor/wire ignition setup works better with y plug, or is one style plug better for above/below certain hp?

Discuss

 

first. what coils are you looking to use.

 

I'm using K-series coils.

But for knowledge sake would like to know why certain plugs should be used for certain applications or power ratings. I know alot of it is going to be peoples opinion but I'd like to get into the technical side of things if people are willing to share their knowledge.

I know of Tony T1's website he recoments Denso IK27 resistor style plugs for applications 400+hp over stock. Why these over say the regular BKRE 9's? Does this come down to personal preference? Usually if Tony recommends something there is a technical reason for it.

 

Found my answer, guess I have been too focused on this and was looking in the wrong places, should have went directly to the faq's on ngk's site. Here's what it reads for anyone interested.

Q: When should I use a resistor spark plug?

A: NGK "R" or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking.

NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.

They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.

In fact, using 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.