1.0 to 1.1 Air Jets?

Air box setup:


ND W24ES-U plugs:


Current Jetting:
Main:  125 1&4
            127.5  2&3
Pilot:   25
Air:   1.0

Considering 1.1 air jets to lean out the mix slightly, but I don't know if it's needed at this point with 60°~80° F. average air temps.
Maybe I should wait til later if/when Summer heats up here.

🙂

Those plugs look lean enough, especially 1,2 and 3.
4 looks better with a little more soot on the base ring and tan on the ground electrode unless it's the lighting.

Yes, plug 4 was slightly rich since the top-end was redone (roughly 1500 miles ago), but has gradually improved to where it is now similar to the others.

Compression is 180 psi. ×4

Deceleration is smooth/popless in the mid 70° F. (low humidity) air temps, and becomes subtle when the air cools to the 60's.

😃