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Evo 9 Spark Plug List, Also how to read plugs.

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Old Jan 31, 2008, 09:50 AM
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Evo 9 Spark Plug List, Also how to read plugs.
ITS RECOMMEND FOR EVERY 100HP OVER STOCK, 1 STEP COLDER

Here is a list I compiled from a few post:

NGK:
LFR7AIX - Stock Heat Range ($8.00 each sparkplugs.com), For those with local advance autos ($12.99 each)
ILFR7H - Factory Plug ($11.71 each sparkplugs.com), For those with local advance autos ($18.99 each)
R7437-8 - 1 Step Colder Racing plug ($41.52 each sparkplugs.com)

Denso:
IKH22 - Stock Heat Range ($11.95 each sparkplugs.com)
IKH24 - 1 Step Colder ($11.95 each sparkplugs.com)
IKH27 - 2 Steps Colder

Stock/Lightly modded cars I would use stock heat range.
Full Bolt-on/Swaped Turbo cars I would recommend colder plugs.

Originally Posted by mrich82

Stock gap for IX plugs is 0.020 - 0.024. This is different from the VIIIs.. so us folks with IXs need to be aware of this when reading about what other people gap their plugs to. Below is from the IX service manual..


And how to read the plugs:
http://www.ngksparkplugs.com/techinf...q/faqread2.asp

MORE INFO
Originally Posted by 31underpressure


Evo 8 spark plugs:

Stock heat range: Gap @ .024-.026

- BRISK Silver Racing LR14YS is performance upgrade spark plug replacing:

BPR7EIX
BPR7ES
IW22
W22EPR-U

1 step colder (modified applications):

- BRISK Silver Racing LR12YS is performance upgrade spark plug replacing:

BPR8EIX
BPR8ES
IW24
W24EPR-U

1 1/2 step colder:

- BRISK Silver Racing LR12S is performance upgrade spark plug replacing:

BR8EIX
BR8ES

2 step colder:

- BRISK Silver Racing LR10S is a performance upgrade spark plug.


Evo 9 spark plugs:

Stock heat range: Gap @ .024-.026

- BRISK Silver Racing ER14YS is performance upgrade spark plug replacing:

ILFR7H
IKH22


1 step colder:

- BRISK Silver Racing ER12S is performance upgrade spark plug replacing:

NGK - R7437-8


2 step colder:

- BRISK Silver Racing ER10S is performance upgrade spark plug replacing:

NGK - R7437-9



Evo 10 spark plugs:


Stock heat range: Gap @ .020-.022


- BRISK Silver Racing MR12S is performance upgrade spark plug replacing:

NGK - ILKR8E6 - OEM part #1822A021

1 step colder:


- BRISK Silver Racing MR10S is a performance upgrade spark plug.


Source: www.briskracing.com
Last edited by Done; Apr 28, 2009 at 12:01 PM.
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Old Jan 31, 2008, 09:59 AM
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lol you must have got tired of people asking

I'm running the IKH24 and they work perfect.
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Old Jan 31, 2008, 10:09 AM
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Dont forget Buschur sells NGK std. plugs for the IX, dunno what part # or where they got them because NGK doesnt even know about them.

But I talked to a guy who runs them and said the are NGK, they are non-iridium and they are the correct length.

I think they are like $25.00 for a set or something like that?

I asked for a part number but they wouldn't give it to me.....but I know of 2 people (myself included) who contacted NGK direct and they had no clue what I was talking about. So figure that one out?
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Old Jan 31, 2008, 10:11 AM
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Just wanted to make finding the information alot easier. It took me 40 mins to dig through all the crap.

Im at the point of need plugs now.
Stock Evo Plugs +18500 miles + GT30R = no power
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Old Jan 31, 2008, 10:26 AM
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Don't forget these plugs. They are copper core. So you will have to change them more often. For the price I don't mind changing them with every oil change.

NGK BPR7ES - Stock heat range. $2.24 each Sparkplugs.com
NGK BPR8ES - 1 step colder. $2.24 each Sparkplugs.com

From what I have read people gap these plugs at .026
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Old Jan 31, 2008, 10:33 AM
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Originally Posted by DrivinMissDaisy
Don't forget these plugs. They are copper core. So you will have to change them more often. For the price I don't mind changing them with every oil change.

NGK BPR7ES - Stock heat range. $2.24 each Sparkplugs.com
NGK BPR8ES - 1 step colder. $2.24 each Sparkplugs.com

From what I have read people gap these plugs at .026
THOSE PLUGS WILL NOT WORK!! THOSE ARE FOR EVO 8 ONLY. EVO 9s HAVE A LONGER REACH.

Those plugs you listed have a 19.05mm reach vs needing a 26.5mm reach.

SO I WILL REPEAT, DO NOT USE THOSE IN YOUR MOTOR!!!
Last edited by Done; Jan 31, 2008 at 10:36 AM.
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Old Jan 31, 2008, 10:39 AM
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People are giving out wrong info then. Damn good thing I never bought them.
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Old Jan 31, 2008, 10:43 AM
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Originally Posted by DrivinMissDaisy
People are giving out wrong info then. Damn good thing I never bought them.
Yes, thats the purpose of this post, to post FACTUAL Information!
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Old Jan 31, 2008, 10:54 AM
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you can also use HKS S40IL (1 step colder than OEM).
they look the same as the Denso IKH24 - so I guess they are Denso plugs

I also find a racing version of the IKH24 named IKH01-24 but I've never tested it.
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Old Jan 31, 2008, 10:59 AM
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IKH27 is 2 steps colder if you want to add those to your list as well.

Thank you for compiling all the info... this may stop me from answering 2 or 3 PM's per week

Are you sure about the stock gap ? i could have sworn it was .024
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Old Jan 31, 2008, 11:38 AM
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thanks, done
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Old Jan 31, 2008, 11:47 AM
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I have pretty much about every bolt on..! I use stock IX plugs.. would 1 step colder benefit me..??

Will these work on the EVO IX??

http://cgi.ebay.com/ebaymotors/4-DEN...ayphotohosting
Last edited by Redline06; Jan 31, 2008 at 11:58 AM.
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Old Jan 31, 2008, 12:06 PM
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those are the exsact ones i bought, so yes and i didnt gap them i just droped them in and ran them.

and when i say exsact, i bought mine from that guy.
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Old Jan 31, 2008, 12:14 PM
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I just bought them.. thxs for the review..!! I will let you guys know my experience..!
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Old Jan 31, 2008, 01:37 PM
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i have always gapped every set i install... usually .024 and then on meth .022. I run the IKH24's
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