I was having a similar sounding problem with a 750 DP on my single turbo SBC Jaguar. I had to build a low profile carb hat to fit under the hood, and with it on it wouldn't turn any rpm or make any boost. I pulled the hat off after a short pull and found the carb was wet with gas above the venturies. The air flowing across the primary vent tube was drawing gas out of it. I welded in a deflector and now it's fine.
Kevin
|