Iridium NGK Plugs

[OnAhigh]

Would just like to add that this happened yesterday, well i was gonna pull everything out again today but thought i would give it one last start and surprisngly it seems to run fine now. So my thought is more on the coils now as i thought it might of been the plugs. seems as though the problem is arising as it gets hotter. but maybe i should still get some colder plugs as mine are 5 heat rating. when i changed to spitfires. or ill give the jjr ones ago.

[chrissyo]

I just purchased splitfire's and want ot change my plugs while im there. Just want copper ngk's 1.1mm to fit my rb25det. When looking at heat range i live in hobart atm it doesnt get over 20degrees anyone know the part number id need?

Thanks

Edited April 13, 2008 by chrissyo

[geraus]

Well i decided to go out today and buy the BCPR6ES ,they r going good so far... No miss or anything..... Currently gota 3inch turbo back and a pod.. hopefully its still good...

I had iridiums and i kept on getin miss fires but now puting in the BCPR6ES they were fine!

[85URK]

hey guys, i just had a fmic and avcr installed, car started running roughly and breaking down under load, i purchased some split fire coilpacks, and replaced my standard pones, and also im running the ngk iridium plugs BKR5EIX-11 in this thread, i orignially though it was plugs but i got the coilpacks. anyway i installed them didnt touch the plugs they are still standard gap, and car seems to run 100% better, didnt miss a beat all the way to redline just now when i took it for a run. but if i didnt buy coilpacks i would have tried to gap the plugs down to 0.8 because the spark from the coilpack must be weakening because of the age of them, and heat soak. and cant fire across the same distance anymore.

Cheers

Daz

[zebra]

Interesting read...Ive tried all the above plugs and found coppers to be less prone to fouling (using a commodore wasted spark set up)

Getting into the physics side of things, Heat kills Electrical current something fierce so keeping ignition coils cool makes a huge difference to the amount of current that gets to your plugs. also why colder plugs are needed in big HP applications.