I just got off the phone a little while ago with Wayne at RC Engineering and asked him about injector lag times.

He said "1300cc and 850cc injectors are not that different since they are both very large injectors, a corection of around .1 - .2 can be used as a precaution though."

I'm guessing what he means is, as injector size increases on "large injectors" lag time isn't as important as it would be for smaller injectors like say going from 400cc to 850cc +.

So for anyone using 1300cc injectors you can use between +.10 - +.20 for your injector lag time corrections.

I'm guessing a 1600cc would fall under the "large" injector category as well so you could use this correction factor as well or even go up to a +.30. You can always call RC Engineering and ask too.