Spark Plugs

[GTS-t VSPEC]

This is why you must use resistor type plugs

I don't use resistor type plugs and have made 600rwhp, so not sure where you got your info from

[JonnoHR31]

The trionic system uses the resistor ® type spark plug to read combustion chamber conditions and "inform" the ECU about boost and ignition advance requirements for the engine in real time and continuously. This is why you must use resistor type plugs

wtf?

[PM-R33]

Hanaldo, here it is in a nutshell.

Iridiums and platinums have the benefit over coppers that the centre electrode lasts longer and therefore the plugs have a longer life. This you have understood correctly.

This is why nearly all cars from factory come with iridiums/platinums and why most people in a standard car run iridiums/platinums.

In a modified car pushing a lot of boost and horsepower the centre electrode and ground electrode fouls up quicker than they do in a stanadard car. Dependent on the tune they can foul up a hell of a lot quicker.

Since they foul up they will start to missfire. This has nothing to do with what the electrode is made out of, it will happen regardless.

Since plugs foul up quicker in a highly modified car, there is not much point using an expensive iridium/platinum spark plug. Hence people use the cheaper alternative, a copper.

Now the added benefit of a copper plug is they can be gapped down when high boost levels are used. You are not ment to gap down an iridum/platinum plug because the electrode can get damaged very easily and render the plug useless.

So yes your tuner is right, however I don't think you will need to go below a 0.8 gap. I have run 20psi and nitrous through mine on a 0.8 copper plug through Splitfire coilpacks and not had a missfire if the plugs were in good condition.

As for the resistor plug, yes he is correct, you are ment to use a resistor spark plug on a RB ignition system. Personally I don't know what the effects are of not running one on an RB are as I have never done so.

So to conclude you want the following spark plug in an RB engine:

BCPR6E

Obviously the heat change is dependent on mods. I use 7's because I need to for the nitrous and high boost level. Other plugs will fit such as:

BPR6E

BPR6ES

BKR6E

etc.

The main differences here are the S on the end stands for "Standard", which means the spark plug doesn't have a V groove on the centre electrode which is ment to give a better burn. So if you can, get one without the S on the end.

And the main difference between the BKR and the BCPR is that the BCPR is slightly longer on the end of the spark plug going into the coil pack than the BKR.

Inside the coilpack there is a little spring that makes the connection between the coilpack and the spark plug. The BCPR compresses this spring more and gives a better contact (once again helps against missfires.)

*I used to sell NGK plugs for years at Autobarn and had many talks with the NGK rep. On a weekly basis I would get guys in imports coming in complaining about missfires due to them running wrong plugs*

Edited November 25, 2010 by PM-R33

[JonnoHR31]

i've run both resistor and non resistor type with no noticeable difference, works the same either way but yes technically your supposed to use resistor type for skylines.

coilpacks are the biggest factor when it comes to plug gaps, for example when i had standard coilpacks, which were pretty tired, i had to gap the plugs down to ~.5mm to stop it misfiring under boost. yes this isnt ideal but its better than misfiring and fixes the problem until you can get new coilpacks. every cars different but basically you want to run the biggest gap you can without misfire. if you can play around with gaps yourself do some experimentation to find what works best, if your paying a mechanic then its probably best to just go straight to .7-.8

[snozzle]

i actually didnt know that last little fact about the length, cheers

[gt35slider]

Hanaldo, here it is in a nutshell.

Iridiums and platinums have the benefit over coppers that the centre electrode lasts longer and therefore the plugs have a longer life. This you have understood correctly.

This is why nearly all cars from factory come with iridiums/platinums and why most people in a standard car run iridiums/platinums.

In a modified car pushing a lot of boost and horsepower the centre electrode and ground electrode fouls up quicker than they do in a stanadard car. Dependent on the tune they can foul up a hell of a lot quicker.

Since they foul up they will start to missfire. This has nothing to do with what the electrode is made out of, it will happen regardless.

Since plugs foul up quicker in a highly modified car, there is not much point using an expensive iridium/platinum spark plug. Hence people use the cheaper alternative, a copper.

Now the added benefit of a copper plug is they can be gapped down when high boost levels are used. You are not ment to gap down an iridum/platinum plug because the electrode can get damaged very easily and render the plug useless.

So yes your tuner is right, however I don't think you will need to go below a 0.8 gap. I have run 20psi and nitrous through mine on a 0.8 copper plug through Splitfire coilpacks and not had a missfire if the plugs were in good condition.

As for the resistor plug, yes he is correct, you are ment to use a resistor spark plug on a RB ignition system. Personally I don't know what the effects are of not running one on an RB are as I have never done so.

So to conclude you want the following spark plug in an RB engine:

BCPR6E

Obviously the heat change is dependent on mods. I use 7's because I need to for the nitrous and high boost level. Other plugs will fit such as:

BPR6E

BPR6ES

BKR6E

etc.

The main differences here are the S on the end stands for "Standard", which means the spark plug doesn't have a V groove on the centre electrode which is ment to give a better burn. So if you can, get one without the S on the end.

And the main difference between the BKR and the BCPR is that the BCPR is slightly longer on the end of the spark plug going into the coil pack than the BKR.

Inside the coilpack there is a little spring that makes the connection between the coilpack and the spark plug. The BCPR compresses this spring more and gives a better contact (once again helps against missfires.)

*I used to sell NGK plugs for years at Autobarn and had many talks with the NGK rep. On a weekly basis I would get guys in imports coming in complaining about missfires due to them running wrong plugs*

i agree

[kidmase]

im using NGK platinums gapped to .711 and they havent missed a beat.

[chuckie]

I done 20,000 kms on my Copper`s,so WHY waste money

[SKITTLES]

So to conclude you want the following spark plug in an RB engine:

BCPR6E

Thanks for all the info, Phill.

Would the following be alright to purchase??

http://cgi.ebay.com/ebaymotors/4-NGK-V-Power-Performance-Spark-Plugs-BCPR6E-11-5632-_W0QQcmdZViewItemQQhashZitem45f4ff0ad7QQitemZ300463098583QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

[JonnoHR31]

apart from the 1.1mm gap they'll be fine. you'll probs have to gap them down a bit

[SKITTLES]

apart from the 1.1mm gap they'll be fine. you'll probs have to gap them down a bit

Thanks, ended up buying some other random sparks from a shop down the road. I'll get the deet of them when i get home (if I remember) and I'll post them up.

They seem to be running alright.