https://www.popularmechanics.com/cars/a6652/5-ways-nascar-stock-engines-arent-actually-stock/

Apr 8, 2011 ... The snarling engines that push Nascar drivers to insane speeds might ... In fact, these "stock" engines are really 850-hp beasts that have been ...

https://auto.howstuffworks.com/question588.htm

The engine in today's NASCAR racecars produce upward of 750 horsepower, and they do it without turbochargers, superchargers or particularly exotic ...

https://en.wikipedia.org/wiki/NASCAR_Cup_Series

The Monster Energy NASCAR Cup Series (MENCS) is the top racing series of the National Association for Stock Car Auto Racing ...

https://roushyates.com/engines/ford-fr9-efi/

This reliable fuel injected engine proves to be successful with our NASCAR ... on a NASCAR rule change the engine was redesigned to meet new specifications.

https://www.nascar.com/news-media/2018/10/02/2019-rules-packages-announced-monster-energy-series/

Oct 2, 2018 ... The smaller spacer will further limit airflow through the engine and thereby horsepower to a figure around 550, down from the current 750.

https://jalopnik.com/heres-how-modern-nascar-race-cars-compare-to-their-road-1827401884

Jul 9, 2018 ... NASCAR runs high-horsepower rear-wheel drive cars with V8s and four-speed manual transmissions, while the road versions of those cars, ...

https://www.espn.com/racing/nascar/story/_/id/24873415/nascar-rule-changes-lower-horsepower-larger-racetracks-2019

Oct 3, 2018 ... With the new horsepower targets, NASCAR hopes to increase the number of races an engine can be used. This year, a team had to pick 13 ...

http://www.ryr.com/nascar-spec-engine/

The NASCAR-Approved Spec Engine is an alternative for competitors in the NASCAR K&N Pro Series, NASCAR Whelen Modified Tour, NASCAR Whelen ...

https://www.enginebuildermag.com/2017/03/nascar-cup-series-chevrolet-5-8l-v8-engine/

Mar 28, 2017 ... At the Monster Energy NASCAR Cup level, it's no secret that the competition is fierce. Every little thing matters from the driver to pit stops to one ...

https://www.trdusa.com/trd-engines-behind-the-build.html

How hard is it to build a 725-horsepower V8 NASCAR racing engine—and build them for six Cup teams? Consider this: Wilson said, “All told, TRD supporting six  ...