Decoding "350 Bored 60 Over": Understanding Engine Modifications
The term "350 bored 60 over" refers to a specific engine modification, primarily used in the context of internal combustion engines, particularly those found in vehicles and motorcycles. Let's break down what this means:
What is a 350 Engine?
The "350" refers to the engine's approximate displacement in cubic centimeters (cc) or cubic inches (ci). This is a measure of the total volume of all the cylinders in the engine. A 350 cubic inch engine is a fairly common size, particularly in American V8 engines. The exact displacement can vary slightly depending on the manufacturer and specific model.
What Does "Bored" Mean?
"Bored" refers to the process of increasing the diameter of the engine's cylinders. The cylinders are the tubes inside the engine block where the pistons move up and down. By enlarging the cylinder diameter, you increase the engine's displacement. This is done using specialized machining equipment.
What Does "60 Over" Mean?
"60 over" signifies the amount by which the cylinder diameter is increased. In this case, "60" likely refers to 60 thousandths of an inch (0.060 inches). This is a common increment used in engine boring. Therefore, the cylinders are bored out by 0.060 inches, resulting in a larger cylinder volume and, consequently, a larger overall engine displacement.
The Combined Effect: Increased Displacement and Power
Combining these elements, "350 bored 60 over" indicates that a 350 cubic inch engine has undergone a cylinder boring process, increasing the cylinder diameter by 0.060 inches. This directly leads to an increase in the engine's displacement, which, in turn, typically results in a higher power output. However, it's important to note that other engine components may also need adjustments or upgrades to fully utilize the increased power.
Frequently Asked Questions (Based on common search queries)
What are the benefits of boring an engine?
Boring an engine, as in the "350 bored 60 over" example, primarily increases the engine's displacement, leading to a gain in horsepower and torque. This can improve performance, acceleration, and towing capacity. However, it's a significant modification that requires specialized knowledge and tools.
What are the potential drawbacks of boring an engine?
Increasing the cylinder bore can weaken the cylinder walls, potentially reducing engine longevity. It's crucial to assess the condition of the engine block before undertaking such a modification. Also, increased displacement may require other modifications to maintain optimal performance and reliability (e.g., upgraded pistons, connecting rods, crankshaft).
How much horsepower increase can I expect from a 60 over bore?
The horsepower increase from a 60-over bore on a 350 engine is variable and depends on numerous factors including the engine's design, other modifications, and the quality of the work performed. There's no single answer – it could be a moderate increase or more substantial depending on the specifics. Consult engine modification guides for your specific engine model for estimates.
Is it expensive to bore a 350 engine 60 over?
Yes, this is a specialized procedure requiring professional machining expertise and equipment. The cost will vary depending on location, the machine shop's rates, and any additional work required (e.g., honing, replacing pistons, etc.). Expect a significant investment.
Can I bore an engine myself?
No, engine boring should only be performed by experienced machinists with the proper equipment and precision tools. Improperly boring an engine can irreparably damage it.
This explanation aims to provide a clear understanding of the "350 bored 60 over" terminology. Remember that engine modifications require careful planning and skilled execution. Always consult with experienced engine builders or mechanics before undertaking such projects.
