1970 Plymouth AAR ‘Cuda Engine Specifications
In 1970 the Plymouth AAR ‘Cuda came with only one engine.
For the 1970 Plymouth AAR ‘Cuda, the 340 Six Barrel engine was the standard engine. No other engine options were available. The engine was rated at 290 horsepower at 5,000 RPM and 345 ft. lbs. of torque at 3,400 RPM. The compression ratio was 10.5:1 and it had three 2 barrel carburetors.
This article will include the 1970 Plymouth AAR ‘Cuda 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 AAR ‘Cuda Engine Specifications
The 1970 Plymouth AAR ‘Cuda was available with the following engine.
- 340 Six Barrel
1970 was the first and only year for the Plymouth AAR ‘Cuda and the 340 Six Barrel engine.
1970 Plymouth AAR ‘Cuda With a 340 Six Barrel
The 340 Six Barrel was the only engine for the 1970 AAR ‘Cuda. This was the first and only year for the AAR ‘Cuda and the 340 Six Barrel engine.
There were some differences between the 340 Six Barrel and the 340 4 barrel. The Six Barrel had the following:
- Three 2 barrel Holley carburetors.
- Edelbrok aluminum intake manifold.
- The block was reinforced with additional material in the main bearing webs so racers could modify it to 4 bolt mains.
- Cylinder head castings were modified (pushrods holes) so racers could expand the ports.
- The valve train used different rockers (adjustable and offset) and pushrods (longer) to accommodate the heads.
The engine code was E55. Let’s take a look at the specifications.
| Specifications | 340 Six Barrel |
| Displacement | 340 |
| Bore and Stroke | 4.04″ x 3.31″ |
| Horsepower | 290 @ 5,000 RPM |
| Torque | 345 @ 3,400 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 | Three Holley 2-bbl |
| Air Cleaner | Unsilenced |
| Exhaust System | Dual, low restriction |
| Fuel Recommended | Premium |
That’s the complete list of engines available for the 1970 Plymouth AAR ‘Cuda. If you have any questions to ask me about the engine options or specifications for the 1970 AAR ‘Cuda 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
- Plymouth Technical Service Bulletin No. 70-25-8
- Dodge Technical Service Bulletin No. D70-25-2
- Dodge Product Information Bulletin #11A
- Dodge Challenger T/A Price & Order Information Bulletin
- Dodge Challenger T/A Information Booklet
- 1970 Plymouth Service Manual
- Google Books: Chrysler Engines 1922-1998
