I had a Floscan 201 in my carbed -3. Whenever the boost pump was on the indicated fuel flow went up by about 2 gph. Left on for any length of time, it caused an error in the Dynon fuel remaining displayed. Recently installed a Dynon D-180, fuel lines and red cube in my carbed -4 and decided to give the
damper a try. $30 directly from Floscan. With the damper the indicated fuel flow goes up about 1 gph when the pump comes on, but within 5 seconds returns to exactly the same flow as with the pump off. Supplied T is installed in the outlet of the red cube. The ball is SS and about 2" in diameter. With a carbed engine, I doubt the ball will ever fill with fuel. Photo
here.
Tony