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Stock Spark Plugs - heat range?

^^^ I'm really just speculating. My old 11.5:1 2ZZ took IK20's -- although, it only made about 180 at the crank. I can only assume the 24's clean up under

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Old 06-28-2010, 04:12 AM   #7 (permalink)
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^^^ I'm really just speculating.

My old 11.5:1 2ZZ took IK20's -- although, it only made about 180 at the crank.

I can only assume the 24's clean up under load -- irridiums have a pretty wide range they operate well under, don't they?

You're proably right about it being tuned to run relatively lean at low load (and maybe even during cold enrichment) -- I think this motor is considered ULEV.
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Last edited by Jordo!; 06-28-2010 at 04:15 AM.
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