like the others said 80 PSI is doubtful to start. If you were to roll down a long hill that might get the motor to spin fast enough to create enough condition for it to start but guaranteed It will be weak and won't want to idle. once it heats up the expansion will more decrease the compression and it will die a slow death.
Dribble some 90 wt oil in the cilnder and then it will start. Just for smoke and fun. Good smell too.