RB20 Spark Plugs?

Discuss the RB20, RB25 and RB26 series engines.
User avatar
xX RB Xx
Posts: 3719
Joined: Wed Jun 20, 2007 3:15 pm
Car: SE3P, FC3S, FC3C.
Location: Japan

Post

Ive found this..
Tastyratz wrote:iridiums are plugs that burn more of the fuel in the cylinder, require less voltage to spark, and can spark at LEANER air/fuel mixtures. iridiums have a much smaller electrode which creates a much smaller "hot spot" a copper plug produces a much better spark than a platinum plug, platinum plugs just last longer and thats what their true advantage is. iridiums properties far surpass platiums, as a metal Ir has 2 3/32 micro ohms per sq. inch, and platinum has 4-11/64 micro ohms resistance. obviously plug design and manufacturing process plays a very large roll, (a really expensive well designed platinum plug might outperform a 75cent copper) but that was just a generic comparison. please do your research on things before spreading mis-information, google is your friend. i thought id try to squelch that argument, this is a useful thread and id like it to stay on topic.
i understand some of this but most of this is like a diffrent language.. Im still using the plugs that came with the motor.. this looked good.. im planning on doing alot of matiance on the motor.

im still a noob when i comes to owning a boosted motor, this is my first one and i dont want to screw it up..


User avatar
Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

Post

use coppers...iridiums are a waste.copper > platinum > iridium.the reason why copper plugs are the best is because they are highly conductive which means they are willing to oxidize very easliy where platinum and iridium do not.there is quite a bit of chemistry behind a plain jane sparkplug and when you get down to it plats and iridiums are for lazy people.i have only had problems when using platinums and iridium plugs in boosted applications...copper all the way with no problems.

User avatar
splitime
Posts: 87
Joined: Tue Apr 22, 2008 4:21 pm
Car: 93 miotta-t
Contact:

Post

Carl H wrote:use coppers...iridiums are a waste.copper > platinum > iridium.the reason why copper plugs are the best is because they are highly conductive which means they are willing to oxidize very easliy where platinum and iridium do not.there is quite a bit of chemistry behind a plain jane sparkplug and when you get down to it plats and iridiums are for lazy people.i have only had problems when using platinums and iridium plugs in boosted applications...copper all the way with no problems.
Hooray! Another person who hasn't fallen for the iridium/platinum marketing.

ALso.... bang for the buck you can change the coppers all the time and have fresh plugs alot more frequently than the "longer lasting" plat/irids.


User avatar
xX RB Xx
Posts: 3719
Joined: Wed Jun 20, 2007 3:15 pm
Car: SE3P, FC3S, FC3C.
Location: Japan

Post

Carl H wrote:use coppers...iridiums are a waste.copper > platinum > iridium.the reason why copper plugs are the best is because they are highly conductive which means they are willing to oxidize very easliy where platinum and iridium do not.there is quite a bit of chemistry behind a plain jane sparkplug and when you get down to it plats and iridiums are for lazy people.i have only had problems when using platinums and iridium plugs in boosted applications...copper all the way with no problems.
ok thanks carl..what heat range plug do i need?

User avatar
DriftingisLame
Posts: 974
Joined: Wed Feb 02, 2005 1:41 pm
Car: '91 240sx coupe, rb20det

Post

Also under high cylinder pressure/extreme temperatures, iridium and platinum will crack and break, they are much more brittle than copper. Copper is a softer metal that can withstand more detonation, where platinums and iridiums will break apart. Sadly, I learned this the hard way with platinums.

BCPR6ES is stock I believe

The 7ES's are one step colder, thats what I run.

Good luck.


Return to “RB20DET / RB25DET / RB26DETT Forum”