Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - V00C00G 17-20 USDM / JDM hybrid integrated ECU project (v60)

callisto · 10-14-2026, 05:32 PM

v60 is published, and may end up being the conclusion of my hybrid efforts. As revised heavily above now notes in detail, I've ended up removing all MY18 EUDM / S20G changes from the hybrid and a good chunk of MY20 JDM / U01A changes as well — changes that were, in fact, either region-specific emissions changes to old-intake S20G that weren't compatible with new-intake, or stock K00G values unchanged in U01A that were changed as part of US/CA emissions tuning in S10C/V00C. This one also incorporates my gen2 throttle smoothing work — it's like driving a car without a dip when driving mpg-ly rather than performance-ly. If I make significant changes that deserve another comment in the future, I'll do so, but I'm content with the outcome of 20US + the best of 20JP + the throttle of 22US on my 19US as of today (2026-10-14).

10-14-2026, 05:32 PM	#9
callisto Senior Member Join Date: Nov 2021 Drives: 2019 Subaru BRZ Location: PNW, US Posts: 123 Thanks: 99 Thanked 109 Times in 56 Posts Mentioned: 4 Post(s)	v60 is published, and may end up being the conclusion of my hybrid efforts. As revised heavily above now notes in detail, I've ended up removing all MY18 EUDM / S20G changes from the hybrid and a good chunk of MY20 JDM / U01A changes as well — changes that were, in fact, either region-specific emissions changes to old-intake S20G that weren't compatible with new-intake, or stock K00G values unchanged in U01A that were changed as part of US/CA emissions tuning in S10C/V00C. This one also incorporates my gen2 throttle smoothing work — it's like driving a car without a dip when driving mpg-ly rather than performance-ly. If I make significant changes that deserve another comment in the future, I'll do so, but I'm content with the outcome of 20US + the best of 20JP + the throttle of 22US on my 19US as of today (2026-10-14).