I fitted two ducts from my bonnet scoop at the weekend and fed them into my air box to aid the flow of cool air. I fired it up for the first time today and went for a little play. It poped and burbled a bit more than usual and had a slight delay in take up before it started to shift, but once going seemed fine until I lifted off then it seemed to lose revs sharply?
I know I can just put it back the way it was and probably will but if I get it tuned to the new mix is it likely to improve performance? I'm pretty sure it's been dyno jetted as it revs past 8k.
Could this mix change cause any damage?

Dave