I was just curious… Right now most light trucks (GM 2500/3500, Ford F250/F350, RAM 2500/3500) hover around having 750-900 lb-ft of torque and 400-500 hp. However, most heavy duty trucks (semi trucks, buses, fire trucks, etc) are hovering around 1,300-1,500 lb-ft of torque. Is there any limit on how much torque/hp a truck (light or heavy) can have? Limits based on frame design? Regulations? Other factors? I'm just curious because at some point no matter how powerful an engine is, there are things to heavy to tow/haul. I'm sure no light truck suspension could handle a space shuttle front tire crashing down in the bed (looking at you, Nissan). How far do you think hp/torque will go until other factors take over to say "you just can't move that"?