Spark Plugs

[nizmo_freek]

I gapped my plugs down to 0.8mm tonight and it has deffinatly made a difference, the hesistation down low has almost gone (still hesistates a little bit sometimes), and it dosent seem to feel sluggish down low anymore.

When i pulled the plugs out the tips and the white porcelain was all very clean (almost brand new looking), but the conductor (the part that you tap down to reduce the gap) was white, and also the white porcelain just above the hex part of the spark plug (same shape as a nut) looked like it had a little bit of white powder around it and also looked a bit blistered

Which possibly means that i need to go to a colder heat range spark plug (most likly a heat range 6) Can anyone confirm if my plugs heat range 5 is ok for my application (i only have a catback and decat pipe at the moment but will be adding more mods in the near future) or judging by my explanation above are my plugs overheating??

Cheers

Jason

[CEF11E]

Jason, I realy think a heat range of 6 is minimum even if the car is standard but you give it a good poke.

once you raise 1 or 2 psi above standard you need a colder plug.

[Trex101]

I gapped my plugs down to 0.8mm tonight and it has deffinatly made a difference, the hesistation down low has almost gone (still hesistates a little bit sometimes), and it dosent seem to feel sluggish down low anymore.

When i pulled the plugs out the tips and the white porcelain was all very clean (almost brand new looking), but the conductor (the part that you tap down to reduce the gap) was white, and also the white porcelain just above the hex part of the spark plug (same shape as a nut) looked like it had a little bit of white powder around it and also looked a bit blistered

Which possibly means that i need to go to a colder heat range spark plug (most likly a heat range 6) Can anyone confirm if my plugs heat range 5 is ok for my application (i only have a catback and decat pipe at the moment but will be adding more mods in the near future) or judging by my explanation above are my plugs overheating??

Cheers

Jason

I would be easier if you have a picture of your plugs but from your description, it looks like it's a case of overheating. A number 6 NGK would have solve your overheating & possible hesitation problem.

Edited December 27, 2006 by Trex101

[nizmo_freek]

I would be easier if you have a picture of your plugs but from your description, it looks like it's a case of overheating. A number 6 NGK would have solve your overheating & possible hesitation problem.

Sorry i didnt take a pic, i might just go and buy a set of NGK R's BKR6ES11 (heat range 6) and gap them down to 0.8mm and see how i go, if i do decide to do that i will post up the results

Cheers for all the help guys

[Trex101]

Sorry i didnt take a pic, i might just go and buy a set of NGK R's BKR6ES11 (heat range 6) and gap them down to 0.8mm and see how i go, if i do decide to do that i will post up the results

Cheers for all the help guys

Get the BKR6E-11 instead, that the better plug with V grove.

[The Mafia]

no, get the BKR7E.

Its a 7 heat range plug, and is pre gapped to 0.8mm.

Forget getting all of these other types. Its been proven about 10 tines on SAU that the best plug for the RB25DET is the BKR7E

[khunjeng]

no, get the BKR7E.

Its a 7 heat range plug, and is pre gapped to 0.8mm.

Forget getting all of these other types. Its been proven about 10 tines on SAU that the best plug for the RB25DET is the BKR7E

are they the coppers? BKR7E-11?

[The Mafia]

no no no

BKR7E

There is no "-11"

If there is no -11 on the end it means they are default gap of 0.8mm. Gapped from the factory.

[khunjeng]

no no no

BKR7E

There is no "-11"

If there is no -11 on the end it means they are default gap of 0.8mm. Gapped from the factory.

yeah thanks sussed that out...

can u get these still, I think they are hard to get.

[The Mafia]

nah, they're not rare, but people don't stock them. Just get them to order them in.

But make sure you ask for "BKR7E" only.

They are copper and have the V grove

[Cubes]

I've ran the BKR7E plugs for quite some time now.

I usually start the car, throw on my seat belt then drive slowly off.

Recently I've been having a play and decided to let it warm for ~1-2mins before driving off and the BKR7E's tend to foul a little. Its only very very slight fouling and they do clear up pretty quickly once driving.

I found Autobarn was the only auto store in Adelaide that I could get the BKR7E plugs from.

Motortraders/Coventrys, Sprints, Motormates, autopro etc said nope we can't get them.

Repco wanted to charge me freight costs or what ever it was.

Motortraders are well priced. 6 BCPR6E plugs for $18.

[nizmo_freek]

I just put in some NGK BCPR6ES (heat range 6 and come pregapped to 0.8mm) and the car feels alot better down low and up high, although there is still some slight hesistation around 2500-3000rpm which im not sure what the cause of that is.

[R33S2]

Edited first post with a short blurb.

I would also like to thank Trex101 and Cubes for thier detailed imput, without them and others I would be still in the dark.

[tom9999]

Can anyone tell me if the Splitfire Triple Platimun or the HKS spark plugs are any good.

I have NGK platimuns in at the moment and they work good and and have lasted a lot longer then the Iridium plugs.

[Gazee]

Just thaught i'd let everyone know... BRK7E Bursons are selling for $3.95 per plug..

[Cubes]

The BCPR6E plugs that are also suitable for the R33 can be had a Motor Traders / Coventry's for $2.85 per plug.

I've ran the BKR7E plugs in my R32 and found them to be a touch too cold for a daily driver.

I tried everything, leaned the water temp correction right out but found the plugs to live a short life, they did ~15,000km's fine before crapping out.

I've since shoved the BCPR6E plugs back in and they look much healthier upon inspection at 10k.

The 6's usually last 30-40k. 40k they really look worn but still work fine.

[iz32]

i just pulled my plugs out as im still having misfiring issues above 16psi and the are the bcpr7's gapped to 0.6 and the tips are white!!! they have only been in car for 5000ks

does this mean they are running too hot?

i have a set of 1.1mm iridiums in the 6 heat range, can these be gapped? the electrode looks pretty fragile

[The Mafia]

dea fuel pump? Sounds like your car is leaning and dropping fuel pressure? Go easy mate, you could kill her if thats the case.

White usually means lean...

[iz32]

dea?

aarrgh now u got me worried.

getting another rb20 dropped in next weekend but need all supporting stuff working..

fuel pump has been pretty noisey lately! how can u tell if they are buggered? will a pressure regulator help the situation?

[Cubes]

7's will definitely not be too hot unless your pushing 350-400rwkw.

My bet is on it running lean. Possibly the misfire is a lean misfire.