Hondata

Have you tried contacting someone who specializes in KPro tuning for the EP3? They might have a known stock UK base map that works with the AEM 30-0300 without needing to guess from the Vault notes. Stickman Hook

It’s absolute pressure. So if you set the boost cut to 4.5 bar, that means 4.5 bar absolute, not 4.5 bar of boost. Basketball Bros

Has anyone got a reliable K20A3 base RSX turbo base map for around 8 psi in KManager, or is the EP3 map close enough despite the different cam gear, and what adjustments are recommended before tuning? Subway Surfers Online

Yes, it's likely an ECU definition limitation. If you're on the latest FlashPro software, there's probably nothing you're missing. Your 37820-5AN-EC1 ECU just doesn't have those features supported yet. FNF

Hey guys, hopefully im not asking you to beat a dead horse here, but im really struggling with closed loop here.

it seems to be hit and miss on these, ive done a few, im hardly a "honda tuner", usually standalone. Last hondata s300 i tuned, i simply turned on
closed loop after tuning the car in ...

qinyuan.zou wrote: Mon Mar 16, 2026 8:23 am When I tune the MAF on the FL5, should I refer to the short-term fuel trim (STFT Geometry Dash) or the total fuel trim value?

You should use Total Fuel Trim (STFT + LTFT) as your main reference when adjusting the MAF curve.

How about exploring an R18 ECU setup or using a Boomslang harness with a secondary ECU?
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