You’re probably right. It sounds pretty slow. 250 is about as slow as my Massey Ferguson 165 will run at and not die when you rev it really fast. It’s a diesel.
@@Ford7710motors of all types need to be retuned after changes of any kind. And reruning may not being back lost power by itself. Any changes need to be balanced. And back pressures are a real thing.
Ole put put j.d. Every year in molena Georgia we have tractor pulls .A girl comes every time on a 620 b model 2 cylinder and makes a full pull..These are monsters..