How much does it cost to bore a 350 030 over?

Are you aiming to increase your Chevy 350 engine‘s power a bit? You can do it by boring the engine. By increasing the engine’s cylinder diameter, one can easily increase the power, torque, fuel efficiency, and horsepower of the engine. But many people don’t know how to do it or how much cost the process involves. Therefore, many Chevy 350 engine owners ask, “How much does it cost to bore a 350 030 over?” There is no straightforward answer to this question. However, the cost can range from $275 to $1000

Go through the entire article to know about boring a Chevy 350 engine, and other relevant information. So, let’s start.

A brief overview of the Chevy 350 engine

A brief overview of the Chevy 350 engine

Since 1911, Chevrolet has blessed the world with their innovative automobiles. The company always tried to come up with something advanced and unique that would satisfy the customer’s needs. In 1955, it came up with a small block V8 engine that featured a 4.3-litre or 256 cubic inch engine. Later, it was upgraded to 350 cubic inch power by 1967. One will observe that Chevrolet had installed the fuel-injected Chevy 350 engine in the models produced from 1985.

The Chevy 350 engine is basically a 5.7-litre or 350 cubic inch engine, featuring a small block V8 with a 3.48-inch stroke and 4.00-inch bore. The horsepower of the Chevy 350 engine can range from 145 to 370, depending on the models, years, and configuration of the automobile. It was one of the then-best towing engines with a torque of 380 pound-feet. In contrast, the engine has limitations when it comes to fuel economy. However, the company discontinued the production of the Chevy 350 engine in 2002. 

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What is engine boring?

In simple terms, when people increase the diameter of the cylinder of the engine in order to increase its power, it is called engine boring. For this purpose, the professionals have to re-design the wall of the cylinder to make it a bit wider. For instance, one can enhance the diameter of an engine’ cylinder from 400 cubic inches to 500 cubic inches. 

However, one can not overbore a block according to one’s wishes. There are some limitations regarding the diameter enhancement. .030, .040, and .060 are some general ones when it comes to boring engine blocks. However, one must install new pistons for the most efficient outcome. 

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What does bore out .030 over mean?

What does bore out .030 over mean

Each engine has a long background history. Briefly, the cylinders in the block come from the factory with straight walls. But over time, the straightness of the cylinder walls distorts because of repeated use and therefore, wear and tear. One can not restore the previous power and compression just by replacing the rings and pistons. You must have to rebuild or “bored out” the cylinders in order to straighten the walls again. 

As aforementioned, one can not bore out cylinders at one’s will.  The most common amount to bore cylinders out is 30 thousandths of an inch or .030 inches. People often call it “30 over.” Besides, the bore out .030 over also indicates that the cylinder wall was re-designed once. 

For instance, If you own a second-hand car and see a “.030″ mark on the piston or in the rebuild receipts, it indicates that the cylinder wall was rebuilt. So, if you wish to bore out the cylinder again in the future, this mark will help the professionals to understand the rebuilt condition of the walls and do a ” .060″ bore out.

Now, some may question how much diameter, a .030 bored out will increase in a 350 cubic inch engine.  If you have done .030 bored out in a 350 cubic inch engine, the upgraded version would be 355 cubic inch.

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What are the benefits of boring a 350 030 over?

Here are some major benefits of boring a 350 030 over:

  • Significant improvement in the engine performance
  • Better automobile responsiveness
  • improvement in the torque and horsepower
  • Increased fuel efficiency
  • Increase the longevity of the engine by reducing damage to the cylinders

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How Much Does It Cost to Turbocharge a 350 030 Over Engine?How Much Does It Cost to Turbocharge a 350 030 Over Engine

If you’re wondering about the cost of turbocharging a car, specifically a 350 030 over engine, it can vary significantly. Factors such as the type of turbocharger, installation fees, and additional modifications required can influence the overall price. Consulting with a professional mechanic or a specialized tuner is crucial to get an accurate estimate for turbocharging a car costs.

How much does it cost to bore a 350 030 over?

How much does it cost to bore a 350 030 over (3)

The final cost of boring a 350 030 over depends on the components used for boring out the cylinders and labor rates. Let’s have a look at the factors that shape the overall cost:

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Required components:

New pistons and rings: 

For a 350 engine, 4.000″ is the ideal bore. Therefore, if you bored it out .030 over, it will be (4.000 + .030) or 4.030. Since the diameter is increasing, make sure you are using new pistons that will be 0.030 inches larger than the standard pistons. The price of pistons can range from $300 to $1000. 

Similarly, you will need larger rings to fit the larger pistons. The price of piston rings can range from $20 to $100.

New bearings:

It is necessary to replace all the existing bearings of the engine as the measurement of the cylinders is changing. These include rod bearing, main bearing, camshaft bearing, etc. 

The price of the main bearing can vary from $50 to $250 while one may need to spend $40 to $200 for the rod bearings. 

Gasket and seals: 

When the professionals progress with the engine boring job, it may damage the existing Gaskets and seals. Therefore, one will need new Gaskets and seals. The price of gaskets may range from $100 to $250 and for the seals, the cost can vary from $5 to $25.

Labor cost: 

If you can bore out your engine, you can indeed a lot of money. Otherwise, professionals will be better off doing this job. In fact, it is best to get this job done by professionals because if you can’t bore the engine properly, it will lead to numerous problems. The labor cost of professionals significantly varies from region to region. But in general, a professional can charge from $50 to more than $200 per hour. 

In sum, the cost of boring a 350 030 over may require you to spend from as low as $ 250 to $1000, depending on the region, component price, and labor rates. 

Frequently Asked Questions:

What are some factors to consider while boring a 350 030 over?

  • Always clean or hot-tanking the engine before boring the engine out. 
  • Don’t take any risk when it comes to the matter of the engine and get the engine boring job done by a professional. Remember, the engine is the main part of an automobile and any compromise in it can damage your life. 
  • Don’t look for excessive power. Try to balance between efficiency and power.

Is it better to bore or stroke a 350 engine?

One doesn’t need to prioritize one over the other since bore and stroke bring the best outcome when done simultaneously. As a result, most customers look for both bore and stroke in order to get the most out of the engine.

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Final Verdict:

Many people want to bore their 350 engine .030 over to improve the engine’s performance and efficiency. Therefore, they often ask, “How much does it cost to bore a 350 030 over?” I have gone through in detail the cost of boring the engine along with other necessary information. I hope the readers will find the information helpful in their practical implementation.

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