OVERKILL
$100 Site Donor 2021
@ZeeOSix and I were discussing this a bit in one of the other threads so I decided to go out and do a 0-60 in the Jeep (hot) to see where that put oil pressure and whether it would overwhelm the relief on the pump and allow pressure to rise beyond the relief spec.
This is the spec viscosity for this engine, which is 0w-40. Engine has a coolant/oil heat exchanger, displaces 6.4L and makes 475HP. For the purpose of this video the vehicle was just placed in sport and floored. It went a little squirrely (did a bit of a sidestep on the squat) but came out of the hole strong with minimal tire spin and was held to the floor until 60Mph was surpassed. How far past 60Mph I went for this exercise is irrelevant, but I'll note that the video does extend beyond that rate of speed before I let off.
Important notes beforehand:
- Pump relief pressure spec is 65psi
- Idle oil pressure in gear is ~30-31psi
- Cruising oil pressure @2,100RPM is 57psi
@Quattro Pete does your ZF8 shift this quickly? I know you were complaining about the shifts being "soggy" even in Sport.
This is the spec viscosity for this engine, which is 0w-40. Engine has a coolant/oil heat exchanger, displaces 6.4L and makes 475HP. For the purpose of this video the vehicle was just placed in sport and floored. It went a little squirrely (did a bit of a sidestep on the squat) but came out of the hole strong with minimal tire spin and was held to the floor until 60Mph was surpassed. How far past 60Mph I went for this exercise is irrelevant, but I'll note that the video does extend beyond that rate of speed before I let off.
Important notes beforehand:
- Pump relief pressure spec is 65psi
- Idle oil pressure in gear is ~30-31psi
- Cruising oil pressure @2,100RPM is 57psi
@Quattro Pete does your ZF8 shift this quickly? I know you were complaining about the shifts being "soggy" even in Sport.