Input delay through 75hz 240fps?

Do I have an input delay in fortnite when I play on a 75hz monitor with 240fps or on 240fps capping?

Nope. Why should?

What is definitely capped for you is your intelligence, uninstall Fortnite or you will own a dove like a friend like Isaac Newton.

If you are used to 144hz and go back to 60 / 75hz, you will feel an input delay (more in fighting games than in shooters, but also there). A cap at 240fps doesn't change anything, how do you figure that out?

Your car will not slow down on the country road if it has a top speed of 240km / h.