I had the roadster on the track for the first time. The car did really well. It's amazingly rewarding to drive fast.

I'm getting an abrupt power loss at the end of the straightaway.
It's happening at 6000 RPM in 4th gear (~200 KPH / 125 MPH).
It's repeatable, on every lap.
Once the car slows down a hair, the power comes back full on.

The car is momentarily starved for air or fuel. It's not a rev limiter. (limiter is 6800 RPM)

I'm running a 750 carb. No induction. There is a lot of wind pressure at that speed. And the roadster is as aero-dynamic as a (flying) pig. Has anyone else experienced this?