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The Mopar Performance 318 to 340 conversion is a popular upgrade among car enthusiasts looking to enhance their vehicle’s performance. This article explores the costs, steps, and expected power improvements associated with this conversion.
Understanding the Mopar 318 and 340 Engines
The Chrysler 318 and 340 engines are both part of the LA (Lightweight A) engine family. While the 318 is known for its reliability and decent power output, the 340 is revered for its performance capabilities. The key differences between these two engines include displacement, horsepower, and torque.
- 318 Engine: 5.2 liters, typically produces around 150-190 horsepower.
- 340 Engine: 5.6 liters, can produce between 240-300 horsepower.
Benefits of Upgrading from 318 to 340
Upgrading from a 318 to a 340 engine can yield significant performance benefits. Here are some of the advantages:
- Increased horsepower and torque.
- Improved acceleration and throttle response.
- Better overall performance for racing or street use.
- Enhanced engine sound and driving experience.
Cost Breakdown of the Conversion
The cost of converting a Mopar 318 to a 340 engine can vary widely based on several factors, including parts, labor, and whether you choose to do it yourself or hire professionals. Below is a general cost breakdown:
- Engine Block: $1,500 – $3,000 (used or rebuilt)
- Head Assembly: $800 – $1,500
- Intake Manifold: $200 – $600
- Exhaust Manifolds: $100 – $300
- Carburetor: $300 – $700
- Labor Costs: $500 – $2,000 (if hiring a mechanic)
Steps for the Conversion Process
The conversion process involves several key steps. Below is a general outline of the process:
- Step 1: Remove the existing 318 engine from the vehicle.
- Step 2: Prepare the new 340 engine by cleaning and inspecting all components.
- Step 3: Install the new 340 engine into the vehicle.
- Step 4: Connect all necessary components such as wiring, fuel lines, and exhaust.
- Step 5: Adjust the carburetor and ignition timing for optimal performance.
- Step 6: Test the engine and make any necessary adjustments.
Expected Power Improvements
After completing the conversion, drivers can expect notable power improvements. The following are typical performance gains:
- Horsepower increase of approximately 90-150 hp.
- Torque increase of about 100-150 lb-ft.
- Improved 0-60 mph times, often reduced by a second or more.
- Enhanced top speed capabilities.
Conclusion
The Mopar 318 to 340 conversion is a worthwhile investment for those looking to boost their vehicle’s performance. With a clear understanding of the costs, steps involved, and expected power improvements, enthusiasts can make informed decisions about their upgrade.