I have done asearch and could not really find anything dealing with this so I will ask now
I had a vAFC which was wired wrong with no vtec pressure I want to can this piggy back system and buy a hondata system I got a p72 ecu from a friend and am having it sockted for the s200 system --- I am running a japan p13 ecu right now and would like to know if I could use the hondata p72 ecu setup on race and track days (does the hondata eeprom write stay in memory i.e no way to earse it without hooking it into a computer) so I could use the hondata system plug and play on race days and the factory p13 during normal driving situations

 

If it's tuned correctly you should have no reason to switch it out... But... if you want to you can swap them without the chip getting erased or anything...