Rolling coal is the practice of tampering with a vehicle’s emissions control system, causing it to spew black clouds of sooty exhaust.
Rolling coal is the practice of tampering with a vehicle’s emissions control system, causing it to spew black clouds of sooty exhaust.
A little smoke is a symptom of making more power. A lot of smoke just means you failed to add enough air to go with it and are pointlessly polluting and wasting fuel.
(Side note: my diesel VW, which is modified for more power but also is typically fueled with 100% biodiesel, produces less smoke than it did stock.)