barit1,
what confused me was that you didn't mention EPR/N1 relationship in your first post:
I'll wager that these are merely 100% gage calibration points. On a cold day N1% will certainly be lower than on ISA day. (Because of increasing air density).
Of course you will have a different N1% on a cold day over a hot day, as you will be setting a different
EPR, not because the indicated N1 % changes due to temp.
Hopefully you can see where there was confusion....
Sincerely,
N1 Vibes