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How much horsepower does a 377 Chevy have?

A 377 cubic inch (6.2 liter) Chevy engine typically produces around 450 to 500 horsepower, depending on the specific engine configuration and modifications. This powerful V8 engine is a popular choice for high-performance applications in classic Chevrolet vehicles and hot rod builds.


Detailed Overview of the 377 Chevy Engine


The 377 Chevy engine is a stroked version of the classic Chevrolet small-block V8 engine. It is created by increasing the engine's displacement from the standard 350 cubic inches (5.7 liters) to 377 cubic inches (6.2 liters). This is typically achieved by using a longer-stroke crankshaft, which increases the engine's piston displacement and, in turn, its power output.


The 377 Chevy engine is a popular choice among enthusiasts and hot rod builders due to its combination of power, reliability, and relatively affordable cost compared to other high-performance engine options. With the right modifications, such as upgraded camshafts, cylinder heads, and forced induction systems, the 377 Chevy can produce well over 500 horsepower.


Factors Affecting Horsepower Output


The exact horsepower output of a 377 Chevy engine can vary depending on several factors, including:



  • Engine Modifications: The level of engine modifications, such as camshafts, cylinder heads, and forced induction systems, can significantly impact the horsepower output.

  • Compression Ratio: A higher compression ratio, typically achieved through the use of forged pistons and other components, can increase the engine's power output.

  • Fuel System: A high-flow fuel system, including a larger fuel pump and injectors, can support the increased fuel demands of a high-performance 377 Chevy engine.

  • Ignition System: An upgraded ignition system, such as a high-performance coil and spark plugs, can improve the engine's combustion efficiency and power output.


With the right combination of these modifications, a 377 Chevy engine can easily produce 450 to 500 horsepower or more, making it a popular choice for high-performance applications.

How much horsepower does a 377 small-block Chevy make?


Even with four 58mm Weber carbs, the 377 only produced 485 horsepower.



What is so special about a Rotax engine?


WE'VE GOT THE POWER. Rotax engines are famous for their reliability and best-in-class power-to-weight ratio. Versatile, cost-efficient, and easy to use and maintain, Rotax engines have gained the trust of flight schools, home builders, and aircraft manufacturers alike.



Did Chevy make a 327 with 375 hp?


Despite being down on inches to the 350, the 327 Chevy still lays claim to the most powerful production conventional small-block ever produced, the L84. Rated at 375 hp, the fuel-injected 327 was a high-winding screamer, as satisfying to drive as any big-block.



What is the difference between Rotax 377 and 447?


The Rotax 447 is a development of the Rotax 377, increasing the power output from 26 kW (35 hp) to 29.5 kW (40 hp) by increasing the cylinder bore from 62 mm to 67.5 mm and the maximum rpm from 6500 to 6800. The modern 447 has a single breakerless, magneto capacitor-discharge ignition (CDI) system.



What is a 377 mag?


Brief Summary. Mercury MerCruiser's 377 MAG engine features a long stroke 4340 crankshaft and custom ground cam for big-boat power in a lightweight package.



Is a 327 more powerful than a 350?


The bottom line here is simple; no matter what you do to a 327, if you do the same thing to a 350, it WILL make more horsepower and torque than a 327 will, period. The same thing goes with ANY engine when comparing cubic inches and power, especially when you are talking about making more torque with longer strokes.



How much horsepower does a Rotax 377 have?


The Rotax 377 is a 35 hp (26 kW), twin-cylinder, two-stroke aircraft engine, that was built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft.



What is a 377 Chevy motor?


The 377 which is listed as a 6.2L engine is a 350 block that has a . 25 inch longer piston stroke which gives it the larger displacement. The 383 stroker is also a 350 block but it has been bored and larger pistons installed.



How much horsepower does a 327 Chevy engine have?


375 horsepower
Those early 375 horsepower models were the fastest factory 327's ever produced and by 1966 the engine dropped to 325 and 350 horsepower models that came with an 11-to-1 compression ratio.



How much horsepower does a 347 stroker make?


Our entry level 347 stroker Ford performance engines boast an honest 400 horsepower and 390 torque and run on premium pump gas. This part number is perfect to upgrade from your old 302. This 347 Ford Crate Engine will give you the reliability you want for your street cruiser while still having the power you need.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.