The Denso IKH24 are great plugs, they are doing what they need to in my car. We will be tuning for 25psi + here shortly. Will report back then.

 

Putting the NGK ILFR7H Laser Iridium plugs in my EvoIX this weekend. Been long over due for a change!

I also checked the Gap on them and they came gapped at .021 all 4 of them.

 

Denso IKH24 are great plugs! perfect for high power!

 

How are people measuring the gap and gapping plugs without touching the electrode? Are they really as sensitive as the Denso website makes them out to be?

 

I put the ground strap on a counter top or solid bench. Then I lightly tap the top of the plug to bend the strap and close the gap to where I need it.

I use feeler gauges to measure mine, I set them to .018 .457mm

 

Thanks. I figure a very slight tap with a hammer and eyeballing with a feeler gauge will probably get the job done, without actually having to touch the electrode. Just curious to see what other people had done.

 

I use pressure on a solid surface to close the strap. I would be a little weary of tapping it with anything.

 

OK, dump question/thread resurrect:

Basically stock IX, Ebay exhaust and LICP, will add a DP soon, 23 psi, conservative tune. In other words, stock heat range ought to work best, am I right?

Just checking.

 

Does AutoZone, O'Reilly's, or advanced carry EVO 9 plugs? I'm basically stock power level. So the ikh22s are best? Which ngk plugs are stock equivalent?

 

Can someone list evo 9 plugs? I don't own a evo 9, but I want to avoid accidentally purchasing plugs recommended for a 9 & it won't end up fitting my evo 7. Are BPR9EiX, BPR9ES, BPR8EiX, BPR8ES for a evo 9?

 

Evo 7/8:

Iridium:

Stock heat range:
NGK - BPR7EIX
Denso - IW22
NGK - BR7EIX

1 step colder:
NGK - BPR8EIX
Denso - IW24
NGK - BR8EIX

Copper:

Stock heat range:
NGK - BPR7ES
Denso - W22EPR-U
NGK - BR7ES
Denso - W22ESR-U

1 step colder:
NGK - BPR8ES
Denso - W24EPR-U
NGK - BR8ES
Denso - W24ESR-U


Evo 9:

Stock heat range:
NGK - ILFR7H
NGK - LFR7AIX
Denso - IKH22

1 step colder:
NGK - R7437-8
Denso - IKH24

 

?BPR9EiX?

 

what spark plug would be recommended for Evo9
with 513 whp all bolt ons, spool in up cop, 25g turbo, 272 cams, larger &0mm Tb, ported Intake mani, tub exhaust mani, cat delete, peak boost 30psi and running on E85

densos.....which one? stock, or 1 step or 2 steps colder. Californian car, always good E85 available.

 

Can any of you respond to how things worked out for you? Which plugs did you go with?
I'm in need of some. I have basic bolt-ons 330 whp @26 psi.

 

No reason to run anything cooler than the OEM plug. NGK ILFR7H is what I use on stock turbo and 500whp+ setups.