Converter has to work with the chosen Camshaft . After that it totally depends on how the Converter is made , for example if you rode in my Fairlane with 5K stall you would never know it as it cruises fine 2350 RPM up hill grade no problems , it also applies smooth and not like a on-off switch that hits hard though it's probably not the best converter for racing it does street drive nice for 5K stall unit that can power brake 4900 RPM (if you wanted )