Which spark plugs

[maccavvy]

after reading the FAQ and reading other posts im still unsure on which plugs to go for .

Whats the advice .. 04 cv8

[SturdyHSV]

Either of the NGK ones in the FAQs will work

BCPR6ES-11

BCPR5ES-11

The 5 is hotter than the 6. Typically 'the internet' seems to think going 1 notch cooler if you're say 100bhp+ over stock. Otherwise the 5 is going to be better.

Both will probably work fiiiine though, they're normally a 2 or 3 quid each.

[maccavvy]

Cheers dude..I'm putting out 380bhp but with a gas conversion
Installer says oe...which I heard were iridium ..is this just a longevity thing.
So 6 would be better.?

[monkfish1]

maccavvy said:

Cheers dude..I'm putting out 380bhp but with a gas conversion
Installer says oe...which I heard were iridium ..is this just a longevity thing.
So 6 would be better.?

Yes, OE is iridium. Will last much longer than a copper plug, especially with gas. Just fit another set of stock plugs.

[KMud]

maccavvy said:

Cheers dude..I'm putting out 380bhp but with a gas conversion
Installer says oe...which I heard were iridium ..is this just a longevity thing.
So 6 would be better.?

Ringram isn't here to fight for copper...theoretically (although perhaps not noticeably) better, but does need changing more often. You pays your money...

[snowwolf]

monkfish1 said:

Yes, OE is iridium. Will last much longer than a copper plug, especially with gas. Just fit another set of stock plugs.

^^^^^^^^^
What roger said, if you have stock HT leads change at same time in my experience.

[TheLeatherman]

In Oz we used to ditch the Iridium plugs for copper V-groove as soon as possible......

[MadMaxHSV]

Went copper here. Partially because they were £10 for a full set on a Halfruads trade card