The MegaSquirt never powered the 8V injector,
I think the 8V injector to be lowZ and 50 PPH
Opening times are pretty typical, and the baseline
used is aprox 1 millisecond, anything lower than
this is questioned by the MegaSquirt program, which
uses the opening/closing time as part of the overall
time in Ms of the injection pulse, giving too long of
an estimated o/c time will be of little trouble with
stock injectors, but with large capacity injectors,
could really cause an over rich idle