RB20DET - Spark Plug Options

[Waldo]

with the ngk iridiums they are 1.1mm gap, im running 14 psi with standard coils, will i need to regap them to .8mm

[Cubes]

Whatsisname also had issues with the BCPR6ES plugs missfiring.

He went the BK or something.. It should show up in a search some where.

I use the BCPR6E plugs.

They are the v-groove plug, I've found them to feel a little better than the standard non-vgroove plugs.

The S plugs at 16psi on the rb20det used to have a little bit of a flat hessitation feeling where as the V grooves didn't.

I leave them in for 20k then pull them out. I've had them in for as long as 40k and they still appeared ok when I pulled them out, no miss-firing etc.

There are 2 plug gaps.

1.1mm or .8mm

The .8mm plugs have nothing after the part number i.e BCPR6E

The 1.1mm plugs have a -11 after the part number i.e BCPR6E-11

I use and always have used the BCPR6E plugs. They are pretty rare, Motor Traders keep them.

They are $16.50 inc gst for a set of 6.

or... $2.75 inc gst.

[SimonR32]

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.

<{POST_SNAPBACK}>

sorry to bump a old topic... but i also have gone from a bcp6e plug with no miss too a bcp6es plug and now have a miss

does anyone know if the copper centre could cause a missfire?

[SimonR32]

also have now been advised to go to a bcp7es plug to run things a little cooler

so now i have a choice

bcp6es

bcp6e

bcp7es

... or maybe even a bcp7e

any suggestions, so far i know that bcp6e on .66mm gap do not miss and bcp6es on .60mm gap do miss

[SimonR32]

ok i have been reading a bit and found this for anyone else who is interested... as it seems the lack of "s" stands for v-groove which is much better for preventing missfire

http://www.ngkspark.com.au/pages/bulletins/S97-1.htm

[Busky2k]

You might have to recheck every sparkie for a correct gap. Those gaps are pretty darn small if you ask me!

Also the BCP/BKR range are all copper.

If you have a lot of mods, I would probably go the BCP7E (or BKR7E). The only difference between the BKR and BCP range is that the little metal tip on the opposite end (where the coils touch) are about 1mm shorter, which should be of no problem.