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Old 01-12-2005, 12:32 PM   #1
attitude
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Member#: 52043
Join Date: Jan 2004
Chapter/Region: MAIC
Location: Huntington WV
Vehicle:
04 sti

Default spark plug recommendation

any ideas for these mods
-green-25+psi
-full exhaust
-850cc pe's
-top mount for now, front mount later
-utec
-avc-r
-external
etc. any brands, or heat ranges come to mind?
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Old 01-12-2005, 12:52 PM   #2
SupraScooby
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04 AW STi GT30R [RIP]

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I got the same mods and the same question
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Old 01-12-2005, 01:20 PM   #3
Physics Junkie
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Old 01-12-2005, 01:25 PM   #4
Physics Junkie
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From what I've read one step colder should do it. You *can* consider two steps colder if you drive your car pretty hard regularly...but most people just stick with one step colder.

If you're lazy--
Denso Iridium IKH22 is the correct sized one step colder plug as seen on this thread.
NGK LFR7AIX is the correct sized one step colder plug as seen on this thread.
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Old 01-12-2005, 02:33 PM   #5
attitude
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i read that thread before, and just like this time, didn't find the info i needed. link to denso didn't work. i also wanted an opinion from people who had experience with my type of mods, and a spark plug choice. thank you for helping out with a step colder after siting the faq.
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Old 01-12-2005, 03:12 PM   #6
g0tb00st
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Redline Red

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Ngk Lfr7aix
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Old 01-12-2005, 05:07 PM   #7
2phless
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Im running densos just fine. Similar mods.
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Old 01-12-2005, 05:31 PM   #8
attitude
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ok, thanks guys
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Old 01-12-2005, 09:23 PM   #9
Brahmzy
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'15 WRX? '15 STI?

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SO what about just a Stage 2 COBB AP and TXS catless TBE? Any reason to do a colder plug?
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