Colder plug for forced induction?

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Rob Furniss
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Colder plug for forced induction?

Post by 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?
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Astron_Boy
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Re: Colder plug for forced induction?

Post by 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...
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Shane001
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Re: Colder plug for forced induction?

Post by 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 :D
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Bennoz
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Re: Colder plug for forced induction?

Post by 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)

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Oh & FYI, I use the NGK Platinums, PFR6J-11.
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Shane001
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Re: Colder plug for forced induction?

Post by Shane001 »

Is Champion on drugs or what :lol:

And WTF is a Pulstar :lol:
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Bennoz
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Re: Colder plug for forced induction?

Post by Bennoz »

I know! What's with the single digit, then bang up with the double :lol:
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Re: Colder plug for forced induction?

Post by 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?
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Re: Colder plug for forced induction?

Post by Astron_Boy »

Bennoz wrote: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.
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Re: Colder plug for forced induction?

Post by Bennoz »

Astron_Boy wrote:
Bennoz wrote: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.
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Astron_Boy
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Re: Colder plug for forced induction?

Post by Astron_Boy »

probably a good bit of insight ;)
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Re: Colder plug for forced induction?

Post by Shane001 »

:lol:

So Ben, what 'heat' number are those plugs?
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Re: Colder plug for forced induction?

Post by 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?
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Re: Colder plug for forced induction?

Post by Dras »

I was able to get Bursons to get pretty close to the ebay price.
Me? Bitter? f**k no. I think it's hilarious.
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Re: Colder plug for forced induction?

Post by Rob Furniss »

Just checked and there isn't one in WA - boo WA, Boo!
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Astron_Boy
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Re: Colder plug for forced induction?

Post by Astron_Boy »

Rob Furniss wrote:Just checked and there isn't one in WA - boo WA, Boo!
As I said before. :lol:
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Re: Colder plug for forced induction?

Post by 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.
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Re: Colder plug for forced induction?

Post by Astron_Boy »

Rob Furniss wrote:Hey we have sunday trading here now though you know.
Lawl.
So, they caught up to the 20th Century finally.
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Re: Colder plug for forced induction?

Post by vipfto »

Bennoz wrote:
Astron_Boy wrote:
Bennoz wrote: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)
FTO GR-TURBO
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