Are some hacking timelines more advantageous than others?

Question

When hacking a portal and total time on scene is not the first concern, is there a strategy for timing hacks to receive better/more items or extend the life of the portal? Does hacking it 3 times back-to-back as fast as it cools off work better, or would giving it 10 or 15 minutes between hacks let you get more goods if you had an hour or so to stay at it?

Also, does leaving the scene and returning later have a different effect than staying in range for the same period of time between hacks?

Answer 1

No, nothing you mentioned has an effect on a portal.

• Minimum time between two portal hacks: 5 minutes
• Portal burn-out after 4 successful hacks
• Portal hackable again 4 hours after first successful hacking
• Only two things influence what items are dropped:
  • Own/enemy portal = more/less items
  • Portal level x => Items dropped with level x-2 to x+2

Example 1:

• Hack 1: 0:00h
• Hack 2: 0:05h
• Hack 3: 0:10h
• Hack 4: 0:15h
• Portal recovered at 4:00h

Example 2:

• Hack 1: 0:00h
• Hack 2: 3:45h
• Hack 3: 3:40h
• Hack 4: 3:55h
• Portal recovered at 4:00h

So if you have 15 (+ x) minutes, hack the portal 4 times and then leave, as there is nothing else to do for the next 4 hours.

Source: http://ingressfieldguide.com/content/faq

Answer 2

As far as is known, the results of a hack depend only on the portal level, your level as determined by your APs, the portal status (friendly, enemy, or netural), and random chance.