Dip in power after peak torque dyno

[Mach1]

Top dyno was a few days ago
Second was last year
A/F is solid, I'm wondering if it's ignition related, maybe I need to swap the plugs and wires, it dips at 4k and gets back on track at 4.5k. I think it's strange that it clears back up at 4,500 and is good all the way till 6k. Base timing is set to 10

[DON SVO]

VTEC butterflies stuck?

[Mach1]

Vtec was removed when i put the ecam in

[DON SVO]

Well there ya go.

[Mach1]

I've seen similar issues on LT1 cars with opti issues, I wonder if it's the TFI module.

[JETFAST]

could be a fuel issue, no A/F on the graph so it hard to tell. Could be also over timed in that area, and could be getting into some pre-ignition around MBT.

[Mach1]

could be a fuel issue, no A/F on the graph so it hard to tell. Could be also over timed in that area, and could be getting into some pre-ignition around MBT.

a/f looked pretty solid, timing is only 24 total on p's, but you made me think of the fact that the fuel in the tank was 4 months old, I wonder if that had anything to do with it.

[JETFAST]

very likely your issue. always test with fresh fuel. pre ignition and or detonation, usually looks real "wavey" like that threw the curve. Even with graph smoothing at it's greatest. Usually a cause of "riding" the knock sensor.