Originally Posted by
engineermike
Cadillactech, you’re actually the second person that’s recommended that to me. I don’t know if the late fuel is wetting the piston, not having enough time for atomization, or a bit of both. Either way, my guess is the particulate matter is higher with late EOI. In the SAE articles they avoided late EOI due to soot formation, but were able to run much later than me. That said, they weren’t really looking for max power and all the tests were at relatively low engine speeds.