spark plugs

[robern2]

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 ?

[Hurdy]

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

[xxx_mojo_xxx]

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?

[robern2]

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.

[Hurdy]

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

[xxx_mojo_xxx]

Cheers Hurdy...it was Opie Oils who got me thinking as the IK24s don't come up when they tap in the GTi details.

[xxx_mojo_xxx]

Car is due for it's 30K service very soon... any updates/or further feedback on the IK24s before I take the plunge?