Originally posted by WHITESTER
I am looking for power, effieceny pros and cons. Which is better and why??
Shaft driven cars:
Better efficiency, it can run very loose without failing putting large amounts of torque on the wheels.
Since they don't have 'elastic' parts in the transmission, the power output is more real and instantaneous since they don't have parts to stretch.
With a closed transmission design, the dust remains out of your delicate differentials and remains in good shape more time.
Dismantling a part of the transmission is clean and quick, you only need to remove few screws to access to the differential without battling with belt tensions and other weird things.
With a design with transmission bar and the bar stays loose on their place, it moves back and forth, creating some sound. Tip: install a blup MIP o-ring at each end of the bar.
Is more prone to create some noise when functioning. the shape of the gears is very sensitive to this.
Belt driven cars (I don't want to enter sepparating 1, 2 or 3 belt cars).
Since they rely on elastic parts to transfer the power from the motor to the wheels, the power output is filtrated by the elastic properties of the belt and their tension. This can be an advantage on low grip conditions.
Lesser noisy cars: since they don't have to battle with gear alignment and other noisy issues, those cars should be more silent.
On open case diff designs: The dust and small pebbles are quite interested on becoming a 'part' of your diff, ruining it or ruining the belt.
Closed case designs: changing a belt can be painful (ask about those to Street weapon owners and their front belt).
Knowing the shape of a belt on a closed transmission car is like a lotto: you never know when a belt should fail simply seeing the belt. And as Mr. Murphy teached us, they fail when you are TQ on the main final.
I tried to be as much impartial as I can be. I've driven cars with transmission bars, 3 belts, 2 belts and one belt.