The Great Spark Plug Debate

[Nesquick]

Share your experiences with different spark plugs in your RB's.

Pros and Cons preferred.

and dont just say "a plug is a plug", there are differences between them.

[Joe]

theres a debate?

NGK BCPR6ES

7 if you heavy track drive

[Nesquick]

not really a debate lol, just found alot of different threads on different people using a different plug.

so i thought i would make one main thread about it

[DeclareYrWar]

Never ran anything but BCPR6ES-11 gapped down to .8 mil. on my rb20 and NEVER had issues. If it aint broke don't fix it lol

[wrgibson]

I'm in the same boat as DeclareYrWar...NGK BCPR6ES-11. These plugs are the bee's knees and for the price, you can't beat em.

[marshallpre1]

Same plugs for RB25 as well?

[Carl H]

in all customers cars that come thru my hands the typically stock plugs (normally shot to hell) are replaced with the BCPR6ES-11's gapped down to .8mm.
the 6 heat range is a great street plug and good for occasional high boost pulls, for cars that are making substantially more power than stock then the BCPR7ES plugs go in.
7's are good for preventing detonation but also foul out much quicker unless you thrash the car often.

[Joe]

truth to that

i was running 7's on my rb and would foul them with tons of quick starts and stops like in the pits, garage, etc

[Largekid]

i'm with carl, 7s for me.

[eh?]

Never had a problem with bcpr7es, but I was never ever near stock.
It depends on how much power you are running, OP needs to say how much he plans to make.

[Nesquick]

for this summer ill be running the stock twins....

next summer i plan on maxing out a gt35r

[RB26needaparachute]

Ive had good luck with the NGK V power R5672A-8 so far. ALthough I dont have many miles on my rb26 and its already under construction again

[Sil240]

I've been using the BCPR6EY-11 AKA Stock # 3720.

This is the same plug as the BCPR6ES-11 except the one I use is a V grooved center electrode with extra projection 14mm 2.5 mm insulator.

http://www.spark-plugs.co.uk/pages/tech ... l_code.htm

[flatrate]

Ive been using Iridium 7's seem to get a better idle with them, my gap is around .023

[Sil240]

Just Dyno'd the other day.
I was told to use 1 step colder, .020" gap and a shorter ground electrode.

But I'm just going to switch to the same plug everyone is using.

BCPR7ES

Advanced auto only has the Autolite version available: 3922

http://www.autolitecatalog.com/PartDeta ... =A&pn=3922

Champion - RC9YC4 - Stk # 430

You can order these for a 99 Saab 9-3 2.0, according to Sparkplugs.com

Or a Audi A6/S4 5cyl 2.2 95-97/92-94

[justin s]

"BCPR7ES" do you leave these gapped to .044

[Joe]

i know you need to close the gap but dont remember to what, i havent gapped an RB plug in 3 years haha

someone will respond with the answer.

[Sil240]

run either .8mm / .038" or .020"

[wv240]

Ac delco 41-602. thats what I run in my rb20 at 18psi. and have never had a complaint or problem at all, I am running the grand national coilpack conversion on it also.

[Carl H]

the guys at advanced auto are morons...the ngk stocking code for the BCPR7ES plug is 6282, this number supercedes the old 3330 pn that it had.
fairly common plug but for some reason most stores only stock 4 of them at a time.

Just Dyno'd the other day.
I was told to use 1 step colder, .020" gap and a shorter ground electrode.

But I'm just going to switch to the same plug everyone is using.

BCPR7ES

Advanced auto only has the Autolite version available: 3922

http://www.autolitecatalog.com/PartDeta ... =A&pn=3922

Champion - RC9YC4 - Stk # 430

You can order these for a 99 Saab 9-3 2.0, according to Sparkplugs.com

Or a Audi A6/S4 5cyl 2.2 95-97/92-94

[ANVIL]

Bump an old good info thread but getting ready for race season and retune. Wondering if u guys recommend the BCPR7ES-11 for a high 300 possible 400hp ~24-26psi RB25, And what gap?

Mostly a summer DD but will make trips to the drag strip, and occasional pulls while driving.

[chad b.]

BKR7E. We run those is a bunch of different import engines requiring a 7 range plug. They're cheap and they work well.

[ANVIL]

Whats the difference vs BCPR7ES?

[ANVIL]

Should i go with a 6 range instead of 7 for my power/boost? Anyone? having a hard time deciding what plugs to get

[ANVIL]

Found this and figured it needs to be in here

[ANVIL]

From NGKs website

Spark plugs with V-groove in the center electrode
Bougies met V-inkeping in de midden-elektrode
NGK’s patented V-grooved spark plugs
NGK’s patented V-grooved spark plugs - The principle is technically simple but very effective. A V-groove is situated in the centre electrode of these V-Line spark plugs. This forces the spark to occur at the outer edge of the centre electrode where it is easier to ignite the fuel/air mixture. In addition, the voltage required to produce a spark is reduced. These two features give the benefit of improved ignitability.
NGK V-line spark plugs offer perfect ignition of the fuel/air mixture. Especially in modern low emission lean-burn engines, even under extreme operating conditions.

[RRRRB]

I run Iridium 8's they are the only resistor style plug offered by NGK that are in that heat range.

[HxC_Nismo]

I run Iridium 8's they are the only resistor style plug offered by NGK that are in that heat range.

im gonna be running the same here on my rb26

[Carl H]

bcpr7es for lightly modded to about 500rwhp sub 20psi boost works well (stocking code 6282).

else bkr8eix or for the longer plug denso iq24 for 500-700 and 20-25psi boost.

past that bcpr9es (which is a pain in the a** to find) or bkr9eix for anything higher than that...

of course this is all subject to the motor/tune/fuel/boost and plug heat range should only be used as a dirty rule of thumb unless you're reading the plugs.
too cold of a plug will not clean properly once up to temp and will foul faster but too hot will increase the motors propensity to knock/detonate.

Currently running the iq24 units in my car with no spark blow out issues, e85 and 16psi...if anything perhaps a touch too cold.