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Author Topic: spark plugs  (Read 11100 times)

Offline robern2

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Re: spark plugs
« Reply #30 on: February 28, 2010, 09:14:49 am »
Question...
The NGK irdium plugs recommended by JKM are one grade cooler than standard ,where as the Densos recommended for stage2+ ed30s like mine are supposed to be 2 grades cooler.
Is one really better than the other ?

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Offline Hurdy

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Re: spark plugs
« Reply #31 on: February 28, 2010, 11:07:42 am »
Not much in it really.

Roughly speaking for every 70bhp the car increases in performance you should go 1 step colder with the plugs. So a stock car is 227bhp and a stage 1 is around 290-300bhp, so should go 1 step colder. A stage 2+ car will be anywhere between 340bhp and 370bhp and so should go 1-2steps colder with plugs.....simple :smiley:
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Offline xxx_mojo_xxx

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Re: spark plugs
« Reply #32 on: March 01, 2010, 12:08:16 pm »
Quote from: xxx_mojo_xxx on February 27, 2010, 10:03:08 pm
Quote from: Hurdy on February 27, 2010, 09:55:00 pm
The ones I mentioned earlier. IK24's!!!!!!!!

The long life ones aren't even a colder rating by the looks of it.

Cheers Hurdy... so how long do the IK24s last for?

Spoke to Opie oils... and the situation is as follows:

Denso Iridium need replacing after 50K
Denso Iridium Long Life need to be replaced after 100K

The thing exercising my mind now is that the IK24s have a gap of 0.4mm, whereas the VK20Ys have a gap 0f 0.8mm...

Will this impact the running of the car?
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Offline robern2

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Re: spark plugs
« Reply #33 on: March 01, 2010, 12:19:51 pm »
Personally, I change my plugs every 2 years regardless of mileage.
I think I'm taking comfort from the fact Densos are 2 grades cooler which presumably is a little cooler than the NGK plugs.
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Offline Hurdy

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Re: spark plugs
« Reply #34 on: March 01, 2010, 01:08:19 pm »
Quote from: xxx_mojo_xxx on March 01, 2010, 12:08:16 pm
Spoke to Opie oils... and the situation is as follows:

Denso Iridium need replacing after 50K
Denso Iridium Long Life need to be replaced after 100K

The thing exercising my mind now is that the IK24s have a gap of 0.4mm, whereas the VK20Ys have a gap 0f 0.8mm...

Will this impact the running of the car?

I've been running the IK24's now for around 3 months and they have been great. No lumpy idle, starts every time.

The gap isn't 0.4mm, it is the diameter of the tip :happy2:
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Offline xxx_mojo_xxx

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Re: spark plugs
« Reply #35 on: March 01, 2010, 01:39:28 pm »
Cheers Hurdy...it was Opie Oils who got me thinking as the IK24s don't come up when they tap in the GTi details.

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Offline xxx_mojo_xxx

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Re: spark plugs
« Reply #36 on: July 28, 2010, 12:14:55 am »
Car is due for it's 30K service very soon... any updates/or further feedback on the IK24s before I take the plunge?
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