spool

1. The act of spinning a turbocharger to optimum operating RPM to create boost

2. Device used to lock the axles of a differential in automotive use so that the axles work as 1 and the inner wheel travels the same distance as the outer. Also known as a locker and can come in a mini or full spool varient.
Usually illegal on the street. Mostly used in motorsport type events such as drag racing, burnouts and drifting.

1. Geeze hear that thing spool up? Must have a massive turbo!

2. My LSD is starting to play up, I might have to go a full spool if I want to keep doing burnouts.

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