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Fuel injection in NASCAR was introduced in 2012, having previously been announced for 2011, which was the last season to see the premier NASCAR series use carburetion. Only the Xfinity Series uses carburetors through into 2021, with no announced change to injection.
Fuel injection technology has been found to be one of the most important technical advances in stock automobiles since NASCAR was founded in 1947.[1] [2] While the sale of manual transmission vehicles would start to decline in the 1970s and plummet in the 1980s, NASCAR continued to hold a strict policy of only allowing manual transmission vehicles in the Cup Series until 2021, when the Next Gen specification featuring 5-speed sequential gearbox.
Cars that compete in the NASCAR Xfinity Series (previously known as Nationwide Series) cars are powered by carburetors; in addition to trucks that compete in NASCAR's Camping World Truck Series.
- ^ NASCAR: Shift to fuel injection a quantum leap Archived 2012-04-04 at the Wayback Machine at F1 Pulse
- ^ Going Beyond Gen-6 at NASCAR.com