Originally Posted by
TWILL
Whats the difference between a one way and a spool????
Originally Posted by
snoopyrc
A spool is like positraction. There is no differrential action at all. Front wheels brake and bite with the driveline.
Well, Kent is partially correct. Not like Posi-Traction at all, though, which is still a gear-driven limited slip differential. In a Posi, you can turn a corner with one wheel driving through the corner, and the other wheel not putting down any power at all (remember the legal strategy in "My Cousin Vinny").
A spool, properly installed, is a live axle—or solid axle, like a go-kart. There is ZERO slip between left to right side drive wheels. In this case, the front tires turning a corner are turning different radii, and relying on the slippage of the tires instead of a differential. Think of trying to make a rolling pencil turn a corner.
A one-way is just that—it's driving in one direction via a needle roller bearing. On power, it is driving forward via needle bearing friction in it's housing, and each wheel will slip on it's own necessary need. Once power is off, the bearings will allow it to spin freely with little internal drag, and behave like a 2wd car. Braking ability is decreased by 50% in a 4wd car, and again like lower class racing karts, only will use braking through the rear axles. For some, this is a really difficult setup to handle, and many prefer to not use it. A front one way is really nice in a situation where the track is flowing, long, and fast, and requires very little braking at all—if any. The car will have less drag from the setup, as it will behave as a 2wd drivetrain without a front differential.
One-ways are not recommended for new, inexperienced or slower drivers. The benefits are usually outweighed by the negatives for drivers who tend to make more than one mistake a race.
Make sense? HTH