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RB20DET - Spark Plug Options

eXc

By eXc,
in Engines & Forced Induction

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R32Big_boy Veteran

R32Big_boy

Posted
Posted

I had platnum's in the car, when i ran 14psi through an rb25 turbo i found that it would blow out the spark. So i got some copper plugs at 0.8mm gap and it works a charm. You could spend big bickies on the iridiums and platnums but the coppers work well for me and cost be $17 for all 6.

rsx84 Veteran

rsx84

Posted
Posted

i use the spitfire Vs' in both my cars, one turbo one N/A, they have platinum tips with a V pattern. in the rb20 i run 10psi on a standard turbo but soon i'll see how they go with a rb25 turbo at 14psi.... about $13 each as well.

DCIEVE Mentor

DCIEVE

Posted
Posted

Very interesting sky30. Im using the bcpr6es at the moment, with a 0.6 gap and its still missfiring badly (19-20psi, 300rwhp). Going to check the coil packs but wouldnt mind trying the bcp6es if that fixed the problem in yours. Would you mind passing on any more details on your setup ?

Thanks

FATGTS-R Experienced

FATGTS-R

Posted
Posted

So what does the 'S" designate? I had the BCPR6ES and also had misfire problems and then they were changed for BCP6E which stopped the misfire.

I asked about the R which I was told was a resistor to stop interference from stereos or something but dont know what the S stands for. I double checked and they are definatelty BCP6E.

predator Grand Master

predator

Posted
Posted
DCIEVE:- I would try the BCP6ES non resistor plugs before anything else, i gap mine at .7mm for 20 PSI in my R32 making 306rwKW, no misfiring.

BCP6ES are just standard RB30/VL ones.. they are like $10 a packet.. lol

Don't you need the resistor type as to not interefere with the other engine electrics? that is what I was told anyhow. Not sure if its correct or not?

Sydneykid Grand Master

Sydneykid

Posted
Posted

I use BCPR6ES-8 for normal use, maybe BCPR7ES-8 for sustained high speed or track use;

B: Indicates 14mm thread diameter in the cylinder head.

C: Hex size 5/8"

P: Projected insulator type

R: Resistor type

1-9: Indicates temperature (1 Hottest - 9 coldest)

E: Indicates 19mm thread reach (approx 3/4")

S: Standard (copper) 2.6mmø center electrode

-8: Gap 0.8mm (0.032")

If you can't get -8 then you will have to adjust the gap to 0.8 mm before you fit the plugs.;)

Sydneykid Grand Master

Sydneykid

Posted
Posted
Sk what is your opinion on the non resistor typre plugs preventing missfire?

SKY30, what motor is in your 32?

Going to swap the plugs (again) for the non resistor type tomorrow.  Will let ya's know if works

The ceramic resister (usually ~5K ohms) is there to suppress the electronic interference from the ignition during sparking. Crackle n the stereo is the most obvious result, although I have seen the ECU and instruments interfered with by the noise generated from using non resistor plugs in a car designed for resistor plugs.

From the NGK tech journal

"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."

The botttom line, I would never use non resistor spark plugs in my Skyline:cheers:

  • 1 month later...
Waldo Proficient

Waldo

Posted
Posted

ok i dont know what to go on but what would be the best for my rb20det, it will be running 19psi, has high flowed turbs, hks front mount, 3.5inch exhaust, cai, bosch 040, gtr injectors, splitfire coilpacks, tomei poncams.

i want to know what are the best ones not value for money

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