Running a FlashPro on an 8th gen Civic Si (K20Z3) with a K&N Typhoon short ram intake (3”). I’ve hand-tuned the AFM flow table off fuel trims and it’s dialed when the intake’s cool — trims sit near zero around 75–90°F IAT. But when the IAT are 105-120 I’m getting +8%
The issue: as IAT climbs, my ...
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- Mon Jul 20, 2026 12:23 pm
- Forum: Civic Si 2006-2011 Americas
- Topic: 8th gen Si (K20Z3) — closed-loop trims climb with IAT, but WOT AFR stays fine. Use air temp compensation?
- Replies: 1
- Views: 576