Jump to content
SAU Community

Recommended Posts

ferni,

Why are you opting for coppers?? you'll be changing them every 10K~ and they provide an inferior spark to iridiums [spelling]... Go to the ngk website they have a selector there. I recently changed mine, just can't remember the code, maybe give the boys at ICE a call, they cost me around $20each. Personally I wouldn't be putting coppers in a GTR, or even a skyline for that matter.

meshmesh - thanks for the input but i think thats a personal preference...

i do plan to change them every 10000ks... since running so rich, i'm guessing they will get fouled/dirty very quickly - no matter what type of plug they are... so i'd prefer to change them at a frequent interval.

I don't see how you can get a better spark out of plats or irids - copper is the best conductor and if the spark ignites the fuel/air then how can plat spark plugs be better? the gapping is what would matter?

Looking through the forum there seems to be different opinions... and i can see why people would choose to pay more for irids / plats, since generally a higher priced product is higher quality/better - and i guess they are but only for length of life as far as i am concerned.

I did a bit of research and it seems they created the longer lasting spark plugs primarily for cars that it is a pain int he ass to change the plugs - so high labour involved = you don't want to do it to often...

in cars like ours where its a pretty easy job i can't see what the benifit would be

I honestly don't mind spending money for better quality stuff, but i think i'd be better off in the long run if i changed them every 10000ks keeping them fresh/new

The main problem with the platinum and iridium plugs is that they never do last 100000k like they're meant to :) So you end up putting in the expensive stuff but having to change em after 20000km anyway. Stick to the coppers :D

thanks duncan - exactly what i'm talking about, i think people put in the more expensive ones then dont bother checking them because htey are suppose to last 100000ks, but i think thats only on a normal car - ie not turbo/boosted/running rich car...

Just as a note, my last iridum plugs which were NGK Iriway 7's lasted 5000km's before one of them basically "shattered"... am now running NGK Platinums at 0.8mm gap yet they still misfire at high rpm, going to put a set of coppers in this weekend as they are meant to have a strong spark and see how they go.

Coppers provide a better a spark, as copper is a much better conductor.

check here: http://www.eddy-current.com/condmat.htm

Iridium's last longer as it is a MUCH harder metal than copper, and are not as prone to thermal and chemical breakdown.

Go to this website for more info: http://www.babcox.com/editorial/cm/cm120032.htm

Bosch have a silver core or silver plated plugs. Silver is a very good conductor, much better than iridium (up to 4 times better), but I don't know much about these, as i have heared no reviews, and they have limited info on their website: http://www.boschautoparts.co.uk/pcPlug5.asp?c=2&d=1

So really you need to figure out what is best for you....

If it's a daily driver.... copper

if you take it to the track often, and want long intervals between changes.... iridium

if you take it to the track, and change often.... copper

but again, these are my personal opinions, and everyone else has theirs.....

Zahos

this is becoming an interesting thread... Not the real techy type, but as advised I went with the iridums after some thread searching & tuners advice. So based on Zahos general view for street, coppers are the way to go??? :confused: I also thought iridiums run colder~ and that was also a benefit???

Amaru could your misfire issue be related to say bad tuning, coil packs, etc etc... and that's why your spark cacked it? I had a misfire issue and that's when we changed the plugs, but they it turned out the misfire was due to bad tuning by my previous tuner.. ICE fixed the problems and all's sweet now.

There is nothing wrong with using copper plugs in a GTR or any skyline.

I used them for over 2 years changing them at around 5-10k kms and they looked to be in perfect condition when i took them out.

There is a difference in physical size of BCPRs and BKRs. From memory the BKRs are smaller (shorter), i had all my old plugs in the shed but threw them all out a couple of weeks ago.

They seemed to work the same, BKRs comes pre-gapped at 0.8mm and BCPRs don't. I think BKRs come with 'v' grooves as well which is meant to provide a better spark.

S on the end stands for standard copper plug

Hence BCPR6E = V groove gapped at 0.8

BCPR6ES = non V groove gapped at 0.8

Although they fit, BKR would have the incorrect thread reach, whouch could result in a build-up of carbon deposits (see http://www.stealth316.com/2-sparkplugtech.htm )

- wait, this is for a GT-R, so I'm not entirely sure which is correct, but make sure you get the righ one. Easiest way, is ask for the recommended platinum plug for your GT-R, a BCPR and a BKR, and compare them.

Zahos

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Maybe they'll look to do a bunch of presales to help inject some cash fast for their financial issues...
    • Does it also misfire equally when revving?   Josh is very correct in what you should do. The coilpack harness wiring loom itself is a known problem due to its age and the number of heat cycles it has gone through. Throwing parts at a vehicle to diagnose the issue isn't a smart or good way to do it. Secondly, you may have a bad coil pack, you pop replacements in, they fix that issue, but messing with the harness breaks it, so the issue persists. So now you think "well it wasn't the coil packs" and have to continue chasing your tail, potentially swapping back in your shit coil packs and returning the good ones (yes, I've seen people do this because 'it wasn't the problem' and they want to save money). And suddenly, you've got two issues with the same symptoms...   Diagnose, don't use the spare parts shotgun.
    • Well the articals keep saying a Q50s (Skyline in Japan) with a new Manual gearbox. I like the talk about the new looks with the round tail lights. I hope they bring back the retro look like they did with the Z
    • Off the back of feedback we have decided to mix up this next Motorkhana at Avalon to have some targeted skills practice for beginners to advanced. Saturday 6th September 2025 8:30am Capped 26 entries Standard Entry Fee: $89 Members Entry Fee: $55 (SAU Victoria Only) Entries Close: Friday 5th February  Where: 55 beach road Avalon. https://maps.app.goo.gl/HNUE3EuNue3sJxh38 Entries: Limited to 26 entrants (Passengers allowed over the age of 14 with a signed disclaimer and same safety gear) Disclaimer: Download  Please electronically sign and email to [email protected] or print and hand in and Driver Sign In. To compete in this event you will require A valid  AASA General Speed licence or (Day license via the AASA Website for $50) MA Licenses are no longer accepted by AASA https://aasa.com.au/  A helmet, long sleeve clothing and a 1KG mounted fire extinguisher recommended (But not Mandatory). Further details within Supp Regs on the enty link. Entry Link > https://www.sauvic.com.au/entry/deca/20250906 You can bring and have a passenger in the car but they need to comply to the same safety and clothing as driver. Bring your car and get to battle others, win, lose or draw. I can guarantee you will have lots of fun. Any questions email [email protected] Entry List: 1.Anna S 2. Luke S 3. Jesse Givens-Lamb 4. Luca Stamatescu 5. Madeleine Stamatescu    
    • Wanna rewrite all of that in, say, 2 or 3 separate sentences, so that we can read it?
×
×
  • Create New...