Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Do spark plugs really make a difference??

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Old Oct 6, 2003 | 06:29 PM
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Kevin M's Avatar
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Car Info: 1993/2000/2001 GF4 mostly red
Use NGK coppers, part number BKR7ES-7 or -8. Experience less detonation. Make power with other mods. Spark plugs themselves don't make power unless you compare them to improperly gapped plugs.
Old Oct 7, 2003 | 12:09 PM
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From: Longing for my ol' white '02 WRX :(
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Originally posted by BAN SUVS
Use NGK coppers, part number BKR7ES-7 or -8. Experience less detonation. Make power with other mods. Spark plugs themselves don't make power unless you compare them to improperly gapped plugs.
What's the diff between -7 asnd -8 ?

NGK's website doesn't recognize that part number


NGK IX iridium BKR6EIX $6.95

NGK Double Platinum PFR6G 11.71

NGK GP platinum BKR6EGP $2.68

NGK Traditional spark plug BKR6ES $2.24
NGK Traditional spark plug BKR6E $2.24

That's all I saw on the NGK.com site.

jason
Old Oct 7, 2003 | 06:26 PM
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Kevin M's Avatar
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The -X number refers to the height of the electrode. -7 comes at like .025 and -11 is like .044 or something. On a WRX, you want to be gapped about .026-.028, so you want -7 or -8.
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