Spark Plugs

[Cubes]

I get a slight pop while reving through gears at WOT. Last 2 days its occured.

My coils are gone, well close too.

[markimak]

Im using Denso PQ20R or P20R.. whatever a GTR uses.

cost me $8 each at cost price. they are a platnium plug. and i re gapped them to a 0.75mm. they replaced my HKS plugs that came with the car. big difference very pleased.

[rob82]

Just to let you guys know we picked up 40awkw on a 420awkw WRX in changine from 99 coil pack system running dumb ignitor with autronic dwell control using a 0.6mm gap to using full CDI igntion with proper coils and 0.9mm gap!!! Mind you it was braking down slightly before hand but the results were throughout the rev range.

[Guilt-Toy]

Same - and i tell everyone that asks me to run them too. No problems at all! i went down to .6 once!

I run NGK BCPR6ES in RB25's gaped at 0.8 mm.

cheers

[Cubes]

Guilt-Toy,

Your running 6's with 260rwkw?

Have you had a good look at your plugs after wot to see if they are running too hot?

[Kinks]

for those 2 days it felt like new car !!

hahaha.. that's what my R31 was like. You could even give it a polish and it would drive like a new car for 2 days. I think it was just my mind playing tricks on me

[Cubes]

hahaha.. that's what my R31 was like. You could even give it a polish and it would drive like a new car for 2 days. I think it was just my mind playing tricks on me

A bit like the do an oil change and it feels faster or smoother syndrome.

[Craved]

A bit like the do an oil change and it feels faster or smoother syndrome.

no way .. that works

i lose 50km a tank if i use the oil too long in my run around lancer Gli

change it and i instantly (next tank) get that 50km back

[Kinks]

oil I can believe, because it's part of the mechanics of the engine and new, slippery oil should give less NVH than old crusty shit. But why it would drive better after a polish I have no idea

[Cubes]

I think some ppls need to do a little reading up on oil.

www.bobistheoilguy.com

[Craved]

I think some ppls need to do a little reading up on oil.

www.bobistheoilguy.com

please share, i cant see anything there saying anything about old oil

all i know is what i get

[Lithius]

Hey just out of curiousity, my tuner replaced my copper plugs with Iridium NGKs and all of a sudden i'm getting huge misfire around 5000rpm (at 0.8 bar) Nothing else has been changed as far as I know. Does it sound like they're 1.1mm gapped and I just need to change it to 0.8?

Gread thread by the way, very helpful to a newbie like myself.

Edited August 15, 2006 by Lithius

[noise]

Hey just out of curiousity, my tuner replaced my copper plugs with Iridium NGKs and all of a sudden i'm getting huge misfire around 5000rpm (at 0.8 bar) Nothing else has been changed as far as I know. Does it sound like they're 1.1mm gapped and I just need to change it to 0.8?

Gread thread by the way, very helpful to a newbie like myself.

crazy dude why pay to retune a car that already had a $500 tune?

secondly GTT's hate iridiums thats why the car had coppers in it.

put coppers back in and gap to .8

[R33S2]

Yah woohoo I finally found the plug for the RB25neo woot!

[tom9999]

whats the best plug for performance and power for a r33 gts-t. how do you rate the Splitfire triple platinum

[nizmo_freek]

Im using NGK IRIDIUM BKR5EIX-11, so i guess that means that they are heat range 5 and have a gap of 1.1mm, is this heat range ok (mods at the moment are hks catback and decat pipe)???

The reason i ask is because at the moment my car seems to hesitate randomly down low sometimes (usualy in 2nd and 3rd gear) and feels a bit sluggish down low aswell (goes fine at 100% throttle in every gear). And sometimes has a very quiet pop out the exhaust.

Do you reccomend i keep the plugs i am using now and gap them down to 0.8mm? or go and buy a different heat range plug and gap that down to 0.8mm??

I would really appreciate some help as its getting a bit frustrating lol

By the way someone should sticky this thread!! it will come in handy for alot of people im sure

Cheers

[Trex101]

Im using NGK IRIDIUM BKR5EIX-11, so i guess that means that they are heat range 5 and have a gap of 1.1mm, is this heat range ok (mods at the moment are hks catback and decat pipe)???

The reason i ask is because at the moment my car seems to hesitate randomly down low sometimes (usualy in 2nd and 3rd gear) and feels a bit sluggish down low aswell (goes fine at 100% throttle in every gear). And sometimes has a very quiet pop out the exhaust.

Do you reccomend i keep the plugs i am using now and gap them down to 0.8mm? or go and buy a different heat range plug and gap that down to 0.8mm??

I would really appreciate some help as its getting a bit frustrating lol

By the way someone should sticky this thread!! it will come in handy for alot of people im sure

Cheers

How does your plugs look now? If it looks white like the picture in the link, then you have overheated plugs. NGK

If not, then gap down by tapping lightly to 0.9mm or lower (use feeler gauge to measure). See if it helps. Iridium plugs normally perform better then normal copper plugs due to hotter kernel flame & lower voltage required to jump the gap.

Edited December 26, 2006 by Trex101

[nizmo_freek]

How does your plugs look now? If it looks white like the picture in the link, then you have overheated plugs. NGK

If not, then gap down by tapping lightly to 0.9mm or lower (use feeler gauge to measure). See if it helps. Iridium plugs normally perform better then normal copper plugs due to hotter kernel flame & lower voltage required to jump the gap.

Cheers for the reply mate, i will check if the plugs are overheating when i have some spare time

It says on the iridium box "Do not adjust spark gap due to extremly fine center electrode", i just tried gapping down a used set of iridium spark plugs and when you insert the feeler gauge (after they have been gapped down) to check if the gap is correct then remove the feeler gauge it bends the center electrode and because its so fine the electrode sometimes snapps off!

So i dont exactly want to risk trying to gap down $80 worth of ngk iridium plugs to find that the electrodes snapp off.

Edited December 26, 2006 by nizmo_freek

[Trex101]

Cheers for the reply mate, i will check if the plugs are overheating when i have some spare time

It says on the iridium box "Do not adjust spark gap due to extremly fine center electrode", i just tried gapping down a used set of iridium spark plugs and when you insert the feeler gauge (after they have been gapped down) to check if the gap is correct then remove the feeler gauge it bends the center electrode and because its so fine the electrode sometimes snapps off!

So i dont exactly want to risk trying to gap down $80 worth of ngk iridium plugs to find that the electrodes snapp off.

The correct way to gap a iridium.

Iridium gapping

[CEF11E]

I have a few questions that have not been covered yet.

Have a look at the plugs pictured below and you will notice that the plugs are different lengths from the plug seat (top ot the thread where they sit in the head) to the top of the pin that the coilpack connects to.

The height difference is approx 5mm.

The plugs that came in my R32 were BPR5EIX and were longer than the BCPR6EY-11. I gapped them down to 0.8.

The first thing I noticed is when you sit the coil on the new plug it only just compresses the spring at the top of the coil it is not a tight fit.

With the older plugs the top of the coil would actually click in and hold the top of plug like an octopus tenticle.

I have also tried BCPR6E and have found the same thing.

I have chronic missfire if I run over 14psi even with the BCPR6E. and believe it or not with the BPR5EIX-11 platinum plug gapped at 1.1 I have no miss untill 16psi.

does the plug height make a difference and has anyone else noticed this?

I have splitfires coming very soon and will not change the plugs as they are only 2000k's old and are BCPR6E and see if the coils alone fix the miss.