Hit NJFL (Joe) with a pm. he runs the atp intake.
Yes, I am running two of them. One on a 760 and one on an 860 (6mm). I don't seem to have any breathing problems with it. I have a single Novi 48. When run side by side with crammit442's similar motor, his hits a little harder, but he is running dual carbs, total loss, and MS109 ( although his hull is 40 pounds heavier than mine). At midrange and high speed though, ours were pretty comparable.
I have a Dominator/M16 with dual 46 Novis sitting at home. Now I just have to get home and mount them to see if it changes anything.
From the feedback from those who have ridden my boat, I can assure you that the ATP is not a limiting factor on power.
ATP single intake:
http://www.queenford.8m.com/inlet_manifold_anotherstepahead.html
Virgin, are you planning to run it on the new ADA you're building? I originally felt that it would work pretty well from seeing Marc Sickerling running one on a 920cc and then myself, calculating the engine's breathing needs for an 860 turning 8000rpm. A single Novi 48 fit right there in terms of airflow requirements. Then I just had to convince Chuckie (Team Scream) to allow a single to go on one of his motors. In the end he was quite surprised.
Now, after discussing with a few people, there will likely be a better bottom end hit with the duals, because of the dedicated carb per cylinder. I'll update my findings in a few weeks.
Anyway, keep us updated if you use it.
Joe