Editing Supercars Championship (section)

===Engine and drivetrain===
All cars must be [[front-engine, rear-wheel-drive layout|front-engine, rear-wheel-drive]], and powered by a [[V8 engine]] designated by Supercars for use in the respected model of car, and balanced in power and weight.<ref>Regulation C.8 https://dscxx9mer61ho.cloudfront.net/wp-content/uploads/2022-Div-C-Final-Issued-10.02.2023.pdf {{Webarchive|url=https://web.archive.org/web/20230619155903/https://dscxx9mer61ho.cloudfront.net/wp-content/uploads/2022-Div-C-Final-Issued-10.02.2023.pdf |date=19 June 2023 }}</ref> Currently, the GM engine (for use in the Camaro) is a 5.7L V8 with a single camshaft and two valves per cylinder. The Ford engine (for use in the Mustang) is a 5.4L V8 with four camshafts and 4 valves per cylinder. These engines were designed to be cheaper and have a higher longevity compared to previous engines, along with being more road-relevant.<ref name=":0" /> The Toyota engine (for use in the GR Supra) introduced in 2026 is a 5.0L V8 with [[Overhead camshaft engine#Dual overhead camshaft|DOHC]] with 4 valves per cylinder.<ref name="GRSupraDebut"/>

As of the Gen3 Supercars, all engines for a given car model are built by a single engine builder - Herrod Performance Engines for the Mustang and KRE Race Engines for the Camaro.<ref name="engine-delivery">{{Cite web |title=First engine allocations complete for Supercars teams {{!}} Supercars |url=https://www.supercars.com/news/first-engine-allocations-complete-for-supercars-teams |access-date=2024-12-18 |website=www.supercars.com |language=en}}</ref> Each engine is tested on a [[dynamometer]] before delivery to ensure the power and torque characteristics are to specification, and engine allocation is randomised to preclude more powerful engines being allocated to a specific team.<ref name="engine-delivery"/> Engines are sealed upon delivery, and modifications are prohibited. Engine servicing is only permitted under strict conditions and after minimum distances completed with the engine. Teams are only permitted two new engines per car, per year.<ref name="2023-operations-manual-division-d">{{Cite web |title=2023 Supercars Championship Operations Manual, Division D (Sporting Regulations) |url=https://assets.ctfassets.net/xd502h20t7lh/3H42SlyV499tyTzr6Nagtv/d26be653eeb1c9acd18a9c63f123714a/2023-Div-D-Final-Issued-10.02.2023.pdf |access-date=18 December 2024 |website=Supercars Championship }}</ref>

Power is transferred from the engine to the rear wheels through a six-speed sequential transaxle with an integrated [[Locking differential#Spool|spool differential]].<ref name="tech">{{cite web |title=Next Gen V8 Supercars |url=http://www.v8supercars.com.au/championship/rules-and-cars/next-gen-v8-supercars |url-status=dead |archive-url=https://web.archive.org/web/20160302225544/http://www.v8supercars.com.au/championship/rules-and-cars/next-gen-v8-supercars |archive-date=2 March 2016 |access-date=25 February 2016 |work=V8Supercars.com.au |publisher=BigPond Sport}}</ref> The individual [[gear ratio]]s and the [[final drive ratio]] are fixed with drop gears at the front of the transaxle allowing the teams to alter the overall transmission ratio for different circuits.<ref>{{cite news | url=http://www.v8scglobal.com/features/qa-with-albins-the-v8-supercar-transmission/ | title=Q&A with Albins -The V8 Supercar Transmission | work=V8SC Global | date=26 February 2013 | access-date=31 March 2013 | archive-url=https://web.archive.org/web/20130621055043/http://www.v8scglobal.com/features/qa-with-albins-the-v8-supercar-transmission/ | archive-date=21 June 2013 | url-status=usurped }}</ref> The cars use a [[Clutch#Multiple plate clutch|triple plate clutch.]]<ref name="tech" /> The cars run on E75 fuel with a fuel tank capacity of about 130 Litres<ref>{{Cite web |date=2022-12-08 |title=Supercars won't dump fuel drop |url=https://www.motorsport.com/v8supercars/news/supercars-wont-dump-fuel-drop/10409120/ |access-date=2023-06-19 |website=www.motorsport.com |language=en}}</ref>

An [[electronic control unit]] (ECU), provided by MoTeC, is used to monitor and optimise various aspects of the engine's performance. Numerous sensors in the car collect information which is then transmitted to the team, allowing them to monitor things such as tyre wear and fuel consumption and find potential problems with the car. The ECU is also used by officials during the scrutineering process.<ref>{{cite web | url=http://www.v8scglobal.com/inside-v8-supercars/the-v8-supercar/ | title=The V8 Supercar | publisher=V8SC Global | access-date=31 March 2013 | archive-url=https://web.archive.org/web/20121124054351/http://www.v8scglobal.com/inside-v8-supercars/the-v8-supercar/ | archive-date=24 November 2012 | url-status=usurped }}</ref> During the race it can also serve functions such as to automatically limit a car's speed.