01-03-2003, 01:32 PM
Join Date: Nov 2002
Location: Flemington, NJ USA
Depending on which one you get it (Associated ,IRS, etc) can be almost 2x as heavy as the graphite one.
The aluminum unit will be stiffer and make the car more responsive (torque-ier) because it wont flex as much.
Increase drivetrain efficiency as more power can be transfered the the wheels without much loss due to flex.
If it bends, it will stay bend.
Lighter but more flexible.
Will allow a faster spool up, but its flexibiltiy will make acceleration appear to be soft.
It it bends, it flexes but returns to its original shape.
Keep in mind that an increase in rotational mass is equal to increasing sprung weight threefold.
For example: say the stock shaft weighs 1 oz. The aluminum shaft weighs 2oz. Under rotation that 1oz difference actually becomes more like 3oz. Those 3 oz will increase the weight of the car.
In the end its a trade off - light and flexy, with a faster spool up or efficient but heavier.