I am about ready to fly again after installing everything new firewall forward. My new engine is IO375 w low, 8:1 compression and I am running dual Pmags along with the EI Commander.
The EI Commander gives me the opportunity to have different ignition timing curves that are selectable.
I would like to have one timing curve for 100LL, which I will certainly use throughout engine break in, and another curve for running auto fuel which I may choose to use as I have alcohol free auto fuel available locally.
So my question for anyone that knows:
How many degrees of ignition timing difference should there be between use of 100LL and 91 octane pure auto fuel?
I know the auto fuel will burn faster and thus will not need as much timing advance, but how much less?
Randall in Sedona
RV7A
The EI Commander gives me the opportunity to have different ignition timing curves that are selectable.
I would like to have one timing curve for 100LL, which I will certainly use throughout engine break in, and another curve for running auto fuel which I may choose to use as I have alcohol free auto fuel available locally.
So my question for anyone that knows:
How many degrees of ignition timing difference should there be between use of 100LL and 91 octane pure auto fuel?
I know the auto fuel will burn faster and thus will not need as much timing advance, but how much less?
Randall in Sedona
RV7A