Nissan 200SX Club - South Africa

What spark plugs are recommended and why?
Or what plugs works the best on CA18?

The standerd plug is NGK BCPR6ES (hot) BCPR7ES (cold)
I am currently using BCP8ES but I am looking for BCPR9ES, the colder s/plugs help against heat and detonation sothat you don't burn pistons so easily with higher boost.

I also heard about BCPR7ES but not BCPR8ES. I found that my car is fitted with those triple spark but I think those plugs are catching on the world of SH!T. The car seems to break down under heavy load.

I'll try new plug tonight and see if there is a difference. Does that plugs need to set with a specific gap, cause I was told to set it 0.8, any view points on this.

a colder plug can handle more boost without its spark being 'blown out'. Im running the BCPR7ES and theyr good till 300 brake

So technically Derek-SON would be the have better option there with BCPR8ES. Not that I am pushing out more than 300k.

I wouldnt recomend running too cold of a plug. Theres a good chance the plugs would foul up

The heat range of a plug is the amount of protrusion of the insulator - if the plug is too hot it cracks the ceramic white bit, too cold and the carbon doesn't burn off and the insualtor becomes a conductor = no spark.

Daniel could be right but I have not seen any of these problems on my car and I am also running a 0.6mm gap, no probs with plugs and and....

Gentleman I am a believer.
NGK BCPR7ES Damn those plugs are good. Changed my plugs and the devils came out. Clean throughout the rev range and boosting 0.9bar.

Took the car against Merc C320 (chipped) and Golf GTi Mk5 and it was neck and neck from the word GO.

Moral of this story: DON"T USE TRIPLE SPARK.

BCPR7ES - yep - that's the stuff.

Had them in my car right up till the bearing went *BOOM* putting heat range 7 NGK iridium's now

a colder plug can handle more boost without its spark being 'blown out'. Im running the BCPR7ES and theyr good till 300 brake

The heat range of a plug is the amount of protrusion of the insulator - if the plug is too hot it cracks the ceramic white bit, too cold and the carbon doesn't burn off and the insualtor becomes a conductor = no spark

Both of the above statements are incorrect. A colder plug has a shorter INTERNAL heat path this allows the electrode to run cooler a hotter plug has a longer internal path and thus the electrode runs hotter.

The reason for this is to allow the electrode to be kept at the correct temperature to burn off carbon deposits.
Running things like 8's and 9's on road cars will lead to hard starting and missfiring once they start to foul.

Running too hot a plug will allow the electrode to become a hotspot promoting detonation and preignition.

The bigger the plug gap the bigger the spark but the more easily the spark will be snuffed out at high boost and rpm.
Most stock coils also cannot produce a spark strong enough to ignite the mixtures under boost with a big plug gap.

Running smaller than .55mm will cause poor idling on most cars due to the small spark so run the biggest gap your combination can handle without missfiring under boost at high rpm.

Hit them They dont want to listen

I am not contesting anybody, all I am saying is I was and am still driving on BCR8ES plugs and tha car has no idling probs, no boost probs no starting probs no nothing but good stuff.

The way I see it, if any plug fouls up it is broken and will cause probs wheather it is a hot cold cheap expensive....., obviosly eridiems will last longer.

you can get the same heat range in both plugs, but one comes without the resister which makes it BCP7ES do we need the resistor if we run coil packs? Or does that not have anything to do with it?

you can get the same heat range in both plugs, but one comes without the resister which makes it BCP7ES do we need the resistor if we run coil packs? Or does that not have anything to do with it?

Me understand it this way: Also got it from internet reading:
Resistor prevent induction and noise into nearby electronics like ECU.
If not for that possability, it would be great running sparkplugs without those resistors. Less resistance better spark. I still need to be put at ease with the electronics interference. So , I am still not that sure.

Bcp7es all the way