Denso or NGK plugs?

[sparky_s13]

Done a bit of searching and looked in the rolling road section to see what plugs people are using.

Theres mixed opinions on the Denso's but I have always used NGK on my other cars so swaying towards NGK's but dont know whether to get grade 7 or 8, which would be best for a over 400hp (3071r) s14?

Currently have a misfire on full load in 3rd/4th gear (unknown plugs at the moment) so would like to change the plugs for piece of mind anyway.

Thanks Lewis

[s14ahunter]

Ngk all the way for me

[bahis]

I'm using NGK grade 8 iridiums with similar specs. Does run a bit rough when the engine is cold, but no missfires when it's warm.

[sparky_s13]

I'm using NGK grade 8 iridiums with similar specs. Does run a bit rough when the engine is cold, but no missfires when it's warm.

BKR8EIX?

Im sure I had some here might have to check before I go buying some.

What do you mean by runs rough?

[mark_clio2]

NGK, if you were happy with the previously then why change, stick to what you know works and is reliable

[Jez]

Ngk 7

[sparky_s13]

Thanks Jez I will give them a try, any particular gap I should be running?

[Jez]

I tend to leave them standard - so long as your coil packs are ok it should be fine.

[sparky_s13]

OK I'll see how it goes, do you mean iridium or copper Jez?

[ryry92]

Iridiums... that's what Jez supplied me



Sent from my GS-4 💥💫

[Neelie]

NGK.... only way to go. denso are for peugeots and opels....

[sparky_s13]

Yep I have ordered some Iridiums

Thanks