Editing Formula SAE (section)

===Engine (IC Competition)===
The engine must be a [[four-stroke]], [[Otto cycle|Otto-cycle]] piston engine with a displacement no greater than 710cc. An [[air restrictor]] of circular cross-section must be fitted downstream of the throttle and upstream of any [[forced induction|compressor]], with a diameter no greater than 20mm for gasoline engines, forced induction or naturally aspirated, or 19mm for ethanol-fueled engines. The restrictor keeps power levels below 100&nbsp;hp in the vast majority of FSAE cars. Most commonly, production four-cylinder 600cc [[sport bike]] engines are used due to their availability and displacement.  However, there are many teams that use smaller [[V-twin]] and [[single-cylinder]] engines, mainly due to their weight-saving and packaging benefits. Very rarely do teams build an engine from scratch, few examples include [[Western Washington University]]'s 554cc V8 entry in 2001, [[University of Melbourne]]'s "WATTARD" engine in 2003–2004, and [[University of Auckland]]'s V twin.  In 2019, 120 student teams registered for competition, and 109 of them were found to be onsite. There was also 2567 students that participated from these teams that showed up.<ref>{{Cite web |title=About - Formula SAE Knowledge |url=https://www.sae.org/attend/student-events/formula-sae-knowledge/about |access-date=2025-03-12 |website=www.sae.org |language=en}}</ref>