EFIDynoTuning Forum

Does a lower compression engine require more crank spark?

How does crank spark effect crank load?

No

It doesnt.

If cranking spark is null then that leads me to believe that more throttle body bypass mass air may be needed along with some additional enrichment. I will try that out

Update: Adding additional crank PW (Load) has helped. I opened the throttle bypass more during cranking and In addition: I reduced returnless pump prime time to almost nothing. I am getting better “torch-offs” now