The biggest contributors to climate in the context of what you are putting forth, would be the disruption of ocean currents in this region of the globe. the 2 most important The Arctic Circumpolar Current and the South Pacific Gyre.
Your land mase looks to be situation directly in the middle of the South Pacific Gyre. To make any prediction (even then would be complete guess work without a super computer) of how this land mass would have on climate you will have to state what the geography of the sub sea continental shelf. How shallow is the seafloor in the regions these currents now flow?
Without the South Pacific Gyre cool water would not be picked up from the south and brought north, thereby heating the northern pacific rising evaporation between your content and south america. Or the Mentor curent (part of the gyre that flows up South America's west coastline may instead be diverted up the coastline of your content. heating the SA coast causing greater rainfall in that region.
All if this is guess work and it gets even worse the farther out you get. Disruptions in the much talked about el nino cycle could have drastic effects as far as Australia Asia and North America.
Perhaps the issue with getting straight forward answers is that; Your not creating a new world and handwaving much of what we don't know. You are taking a lot of what we know, but don't fully understand anyway, and plopping a great big steaming question mark into the middle of it all. As I said, if there was an answer, it would have to come from a super computer and it still would not be correct. Because we can't get accurate predictions with all the hard data that exists in the real world.