1970 Plymouth Duster 340 Engine Specifications
In 1970 the Plymouth Duster 340 came with only one engine.
For the 1970 Plymouth Duster 340, the 340 high performance 4 barrel engine was the standard engine. No other engine options were available. The engine was rated at 275 horsepower at 5,000 RPM and 340 ft. lbs. of torque at 3,200 RPM. The compression ratio was 10.5:1.
This article will include the 1970 Plymouth Duster 340 engine and its specifications. This includes the engine code, cost, displacement, horsepower, torque, compression ratio, camshaft, lifter type, valve sizes, bore, stroke, air cleaner, exhaust, fuel and carburetion.
1970 Plymouth Duster 340 Engine Specifications
The 1970 Plymouth Duster 340 was available with the following engine.
- 340 4-barrel
1970 was the first year for the Plymouth Duster and the Duster 340.
1970 Plymouth Duster 340 With a 340 4-barrel
The 340 4-barrel was the only engine for the 1970 Plymouth Duster 340. This was the first year for the Duster 340 but not for the 340 engine.
The 340 was available a few years earlier on other Chrysler models. The engine’s rated horsepower and compression remained the same from the previous year 340.
The engine code was E55. Let’s take a look at the specifications.
| Specifications | 340 4-barrel |
| Displacement | 340 |
| Bore and Stroke | 4.04″ x 3.31″ |
| Horsepower | 275 @ 5,000 RPM |
| Torque | 340 @ 3,200 RPM |
| Compression Ratio | 10.5:1 |
| Camshaft | High lift, high performance |
| Cam Duration/Overlap | 268°/276°/44° |
| Cam Lift | .429″/.444″ |
| Lifter Type | Hydraulic |
| Valve Diameter, Intake | 2.02″ |
| Valve Diameter, Exhaust | 1.60″ |
| Carburetion | Single Carter 4-bbl |
| Air Cleaner | Unsilenced |
| Exhaust System | Dual, low restriction |
| Fuel Recommended | Premium |
That’s the complete list of engines available for the 1970 Plymouth Duster 340. If you have any questions to ask me about the engine options or specifications for the 1970 Duster 340 car model, send us an email found specifically on my contact page or comment below.
About 39 years ago I assembled my first Mopar engine, it was for a 1970 ‘Cuda. It’s at that time my hands on experience with Mopar cars and engines, including the 440, started. Although my research of the engines started years earlier.
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Article Resources
- 1970 Plymouth Service Manual
- Google Books: Chrysler Engines 1922-1998
