How much horsepower does a 318 Chrysler engine have?
The Chrysler 318 engine, a member of the LA (Light A) engine family, is a small-block V8 that has been a staple in Chrysler's lineup for decades. Known for its reliability and versatility, the 318 has powered a wide range of vehicles, from muscle cars to trucks. In this article, we’ll explore the horsepower ratings of this iconic engine and what factors can influence its performance.
Factory Horsepower Ratings
The horsepower of a Chrysler 318 engine varies depending on the year, model, and configuration. Here’s a general breakdown:
- 1967-1971: Early versions of the 318, equipped with a two-barrel carburetor, typically produced around 230 horsepower.
- 1972-1980s: Due to stricter emissions regulations, the horsepower dropped to approximately 150-170 horsepower during this period.
- High-Performance Variants: Some high-performance versions, such as those equipped with a four-barrel carburetor, could produce up to 240 horsepower.
It’s important to note that these figures represent factory ratings and may vary slightly depending on the specific vehicle and setup.
Factors That Influence Horsepower
Several factors can influence the horsepower of a 318 Chrysler engine, including:
- Carburetor Type: Engines with a four-barrel carburetor generally produce more horsepower than those with a two-barrel carburetor.
- Exhaust System: A more efficient exhaust system can improve airflow and increase horsepower.
- Camshaft Profile: Upgrading to a performance camshaft can significantly boost power output.
- Ignition System: A modern ignition system can improve combustion efficiency and add a few extra horsepower.
Can You Increase the Horsepower of a 318 Chrysler Engine?
Yes, the 318 engine is highly modifiable, and many enthusiasts have successfully increased its horsepower. Here are some common upgrades:
- Installing a performance intake manifold and carburetor.
- Upgrading to headers and a free-flowing exhaust system.
- Adding a performance camshaft and lifters.
- Porting and polishing the cylinder heads for better airflow.
- Switching to a higher compression ratio with new pistons.
With these modifications, it’s possible to push the 318’s horsepower well beyond its factory ratings, making it a popular choice for hot rodders and muscle car enthusiasts.
Conclusion
The Chrysler 318 engine is a versatile and reliable powerplant with a wide range of horsepower ratings depending on its configuration and era. While factory ratings typically range from 150 to 240 horsepower, the engine’s potential for modification makes it a favorite among car enthusiasts looking to extract more performance. Whether you’re restoring a classic or building a custom project, the 318 is a solid foundation for your automotive ambitions.
Frequently Asked Questions
How much horsepower does a 318 Detroit have?
Variants
| Model | Displacement | Power |
|---|---|---|
| 4-71 | 4.7 L (284 cu in) | 160 hp (119 kW) |
| 6-71 | 7.0 L (426 cu in) | 170 hp (127 kW) |
| 6V-71 | 7.0 L (426 cu in) | 238 hp (177 kW) |
| 8V-71 | 9.3 L (568 cu in) | 318 hp (237 kW) |
What was the last year for the 318 engine?
The "LA" and "A" production overlapped from 1964–1966 in the U.S. and through 1967 in export vehicles when the "A" 318 engine was phased out.
How much horsepower does a 1978 Dodge 318 have?
As for the 318, its meager 140 horsepower and 245 ft. -lbs. of torque were hard pressed to motivate the 3,800-pound Magnum GT like a true muscle car. An optional 360 ($109) with 175 horsepower and 270 ft.
How much horsepower does a 340 Mopar have?
320.3 horsepower
With the single four-barrel cast-iron factory dual-plane intake and exhaust manifolds, the basically stock 340 revealed the glorious truth with 320.3 horsepower at 5,500 rpm. Torque was 368 lb-ft at 3,500 rpm.
How much horsepower does a 1970 Plymouth 318 have?
Up until 1971 the 318 is listed as making 230 hp. In 1972 and up it drops to 150 hp.
How much horsepower does a 360 V8 have?
This 10.5:1 compression, 360 cid Mopar V8 makes 425 horsepower.
How much horsepower does a 5.9 Dodge Magnum have?
Magnum 5.9 engines commonly carried a rating of 245 horsepower, with the tiny factory hydraulic roller camshafts delivering a hair over . 400-inch lift.
How to get more power out of a 318 magnum?
To get 400 HP out of that 318, you are going to have to up your compression. Get a set of closed chamber heads(low cc),thin head gaskets, . 022 range. A good cam,480-500 range.
Can you get 1000 hp out of a 4 cylinder?
Yes, Cummins Makes a 1,000 Horsepower Engine for the Army—and It's a 4 Cylinder.
How much HP can you get from a 318?
Mopar 318 Engine - The Little Mopar That Could
| Dyno Results | ||
|---|---|---|
| Mopar 318 | ||
| RPM | HP | TQ |
| 3,000 | 190 | 332 |
| 3,500 | 241 | 376 |
