Colder plug for forced induction?

[Rob Furniss]

Is it advisable to run a colder plug for forced induction even a low boost setup around 8psi?
I used to run Denso IK22's previously and got away with but just wondering if I should run IK24's or is there a better plug entirely?

[Astron_Boy]

From memory the FTO, gpx namely uses a 7 heat plug?
If so then that's fine, you won't need anything else.

If they use a 6, then you could go a 7, but I wouldn't go anything lower than 6...

[Shane001]

Yeah it depends what you're going to use it for.

If it's a streeter, u don't want colder than 7 otherwise the plug will gum up idling around town.

If it's a racer you could go as cold as a 9. From memory I'm running a 9 in the racecar (non turbo), but only cause I had an almost new set of Iridiums from my previous racecar (turbo Supra) and they've been fine in the FTO, but I rarely run the engine under 4000 revs

[Bennoz]

Dont forget, you're are talking about NGKs ^^ I.e, the higher the number the colder the plug.

With other manufacturers like Bosch & Champion, it goes the other way (ie the colder the plug, the lower the number)



Oh & FYI, I use the NGK Platinums, PFR6J-11.

[Shane001]

Is Champion on drugs or what

And WTF is a Pulstar

[Bennoz]

I know! What's with the single digit, then bang up with the double

[Rob Furniss]

Oh right cool, a Denso IK24 would be ok then and slightly better than an IK22 without going too mad, maybe an IK27 is too cold for a car which is primarily used on the street (nipping to the shops) with the occasional drag run as it will get fouled up?

[Astron_Boy]

Dont forget, you're are talking about NGKs ^^ I.e, the higher the number the colder the plug.

Oh & FYI, I use the NGK Platinums, PFR6J-11.

Ha! learnt something new, I've only ever used NGK.

Interesting you have an 11mm gap, but not the first time an 11 has been recomended over an 8 for boost applications.

[Bennoz]

Dont forget, you're are talking about NGKs ^^ I.e, the higher the number the colder the plug.

Oh & FYI, I use the NGK Platinums, PFR6J-11.

Ha! learnt something new, I've only ever used NGK.

Interesting you have an 11mm gap, but not the first time an 11 has been recomended over an 8 for boost applications.

Probably should have added that I manually gap them down to 0.7mm.

[Astron_Boy]

probably a good bit of insight

[Shane001]

So Ben, what 'heat' number are those plugs?

[Rob Furniss]

Trying to source some Denso IK24's or equiv NKG's now, I can get a set of 6 off ebay for $105 delivered (they are in WA somewhere but prob not near me) but thought I would ring local first.
Supercheap - no
Repco can order NGK's in - at $32.99 each!
Anywhere else before I go with ebay?

[Dras]

I was able to get Bursons to get pretty close to the ebay price.

[Rob Furniss]

Just checked and there isn't one in WA - boo WA, Boo!

[Astron_Boy]

Just checked and there isn't one in WA - boo WA, Boo!

As I said before.

[Rob Furniss]

Hey we have sunday trading here now though you know, still no daylight saving yet as cows would be confused at milking time.

[Astron_Boy]

Hey we have sunday trading here now though you know.

Lawl.
So, they caught up to the 20th Century finally.

[vipfto]

Dont forget, you're are talking about NGKs ^^ I.e, the higher the number the colder the plug.

Oh & FYI, I use the NGK Platinums, PFR6J-11.

Ha! learnt something new, I've only ever used NGK.

Interesting you have an 11mm gap, but not the first time an 11 has been recomended over an 8 for boost applications.

Probably should have added that I manually gap them down to 0.7mm.

changing mine before tune as mine are starting to foul up esp since running so rich ATM, currently have NGK BKR6EIX-11 taking on board reccomendations should I stay with these (iridiums) or change to the above? Still going to run 7psi only (of course will replace more often now)