Lets run some number to see exactly how much fold equity you would need.
Assumptions
- You have 400 to start
- Opponent has you covered
- On the turn the pot is $60 and you are facing a $60 bet
- On the turn you have $376 left.
- If you get all in the pot will be $812
- If you get all in you will have roughly 25% of the equity
Results
- When you raise and take it down you will win $120
- When you get all in you will lose (812)(.25)-376 = $173
Basically to make money you have to take it down 3:5