RPM:
Higher RPM move the EFFECTIVE timing closer to TDC. This results
in more expansion = lower EGT.
Walter, I understand why higher rpm moves the
effective timing LATER
but I don't understand why that results in "more
expansion"
...also & btw I didn't understand why 7.5:1
timing being two degrees earlier improves the relative bsfc to the
8.5:1
Colyn