Recomendations on spark plugs for my evo ix

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May 8, 2010 | 10:14 PM

#16

Spoolin4g63

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From: Monterey Ca.

stock ngk plugs

May 9, 2010 | 07:33 PM

#17

iTune

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From: Jacksonville

NGK Iridium IX plugs for any 4g63(or any other high output gasoline internal combustion engine). They are going to be different for depending on what gen your engine is. I can't recall the part numbers for the E9, but the E8 uses NGK Iridium IX BR{insert heat range}EIX (for non-protruded electrode) or BPR{insert heat range}EIX (protruded electrode). Please keep in mind, that regardless of engine, non-protruded electrode plugs run in half heat ranges. A BR8EIX plug is actually 1.5 times colder than stock heat range (BPR7EIX). A BR7EIX plug would be a half heat range cooler than the stock heat range.

The NGK Iridium IX plugs are the best plug on the market, bar none. In my years as a dyno tuner, i did a lot of research and testing on many different plug types on a myriad of different platforms. The NGK Iridium IX plugs exceeded all other plugs in every category on every platform.

May 10, 2010 | 09:56 AM

#18

golgo13

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From: @ a track near you

Quote:

Originally Posted by EvoIX505

hey wats up i need to change my spark plugs but i dont know which ones to go with wat do you guys recommend?

Funny you should ask...

Quote:

Originally Posted by Done

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.

Quote:

Originally Posted by mrich82

This is a good thread to keep everything together I think, so I'm going to add. This should be corrected in the first post!

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

Quote:

Originally Posted by 31underpressure

Here is application charts for Evo 8, Evo 9 and Evo 10 spark plugs. I got it from briskracing.com. I have them in my car and they work great. Before I ran the NGK R7437-8 spark plugs and I got tired of paying 140 bucks a set. The one's I bought from Brisk cost less and have already lasted much longer than the NGK's I was using before.

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

Mar 17, 2011 | 04:54 AM

#19

wally7714

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From: Milwaukee

I just got BBK-B Turbo, Tubular Manifold and GSC S2 Cams going on the car in 2 weeks I should be pushing 400-420 whp on the pump 93 My question with this power output should I go with 1 step colder plugs or not