how come now i have to turn my boost down to 14 instead of 17 now that it is cold my o2's are 750 with 17# with 61# of fp at wot and at 14# there 790 thats with 44# of fuel pressure and 58# wot
because colder air is denser than warm air, so for a given volume, you now have more air and therefor more oxygen in each chamber. This can also cause you to lean out if you push it hard boost wise.