I'm about to install some 1050cc injectors and am I going to have to compensate for dead time using evoscan/ecuflash or can I just put them in and be okay? I currently have 680cc injectors installed.

 

You will need to rescale them as with any injector.

 

The car will not run correctly without the correct scaling and latencies. Don't put them in until you get tuned.

 

Scaling and latency needs to be redone. There's a thread with all of the scaling and latencies people have done for numerous size injectors. Check it out and start with something similar to yours. Then do some logging to get it accurate.