i i towed with my truck and i put to big of injectors i want somthing bigger than rv 275 but smaller than 8 hole . 01 i didn't push may truck but it will hit 1200 without trying a empty burnout is 1300 and a flat out race i have hit 1475 i have pulled it yet i going to put water injectionon pretty soon but not sure if it will cool down enough to keep her going.