IZwack
Moderator Emeritus
- Joined
- February 5, 2003
- Messages
- 21,532
- Reaction score
- 50
- City, State
- Germantown, MD
- Year, Model & Trim Level
- 1998 Ford Explorer
I assumed the person doing the swap wasnt just going to weld straight to the chassis w/o doing any modificatoins to it -- along with stiffer coil springs, a new cross member (since the stock stamped one will have to be cut out), and all the little details.Newtons third law plays into supporting the engine as it pitches to the side, creating a twist the frame must resist with an engine weighs over double that of a 4.0.
My argument was not about how much torque the 6BT is putting out, but rather that this RBV frame will handle it just fine because the RBV frame will probably never get to "see" all that torque. There isnt enough weight at the rear axle and no one is going to put their vehcle in 4wd while on asphalt so all that torque is going to go to the rear wheels which can not get enough grip to push back that same amount of torque but in opposite direction -- it will spin and break free. So even if an engine puts out 1,000 ft/lbs of torque but the amount of grip at the rear axle (weight at rear axle * coefficient of friction) is less than 1,0000 ft/lbs, then we will never see 1,000 ft/lbs. Its like pushing against a block of foam vs a brick wall -- no matter how strong you are (engine's rated torque), you wont be applying that much much force (torque) against that block of foam (the road) because if you do, the foam will just fracture and crumble (when the tires break free).Also, 6BT put out about 450-500 ft lbs with in most stock forms without any gear reduction, an easy half of what you are claiming with the 4.0 with a doubler. Also with 600-1000 is not out of reason for a decently built cummins. Add any gear reduction and you have a wad more torque.