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How do I know if my BBC is a 4 bolt main?

How do I know if my BBC is a 4 bolt main?

Someone once told me that you could tell the difference between a 2 or 4 bolt main by looking at the size of a hole on the side of the block. If the hole is small, it’s a 2 bolt and if it’s large, then it’s a 4 bolt.

How much horsepower does a 350 4 bolt main have?

Stock 350. The four-bolt main 350 with two-barrel carburetor came with 8.5:1 compression, and was good for 145 horsepower at 3,800 rpm and 250 foot-pounds of torque at 2,200 rpm. 350s equipped with four-barrel Quadrajet carburetors produced 170 horsepower at 3,800 rpm and 255 foot-pounds of torque at 2,800 rpm.

How do I identify a 350 Chevy?

How to Identify a Chevy 350 Motor

  1. Look at the rear of the engine block for casting numbers, by where the transmission mounts to the engine.
  2. Write down that number, and go to MorTec.com.
  3. Look for a second casting number on the rear of the block.
  4. Look at the front of the block, just forward of the valve covers.

What vehicles came with a 350?

As a high-performance 350-cubic-inch power plant, it was used initially in the Chevrolet Camaro. In fact, it’s first appearance was as an L-48 option for the 1967 Camaro. However, the 350 later went on to power the Corvette, the Nova, the Caprice, and numerous other vehicles.

How much horsepower can you get out of a 350 Chevy?

a typical 350 Chevy can make upwards of 350 – 375 HP before you exceed the reliability of the components. For a big block with the same stock components it can make in the area of about 400 to 475 or so HP and handle upwards of about 500 HP before you exceed the reliability of the stock cast pistons.

Is Gen V 454 a 4 bolt main?

Here’s a pristine Gen V 454 from a 1990 Chevrolet 454SS pickup. Gen V, introduced in 1991, included a superior one-piece main rear seal, new oiling passages closer to the cam, and all blocks received four-bolt mains.

How do I identify a 454?

How to Identify a GM 454

  1. Identify the year and model.
  2. Look for decals on the engine.
  3. Locate the engine ID number located at the front of the engine block on the passenger side.
  4. Decode the ID number.
  5. Verify the casting numbers from either the cylinder head, intake manifold or crankshaft.

How much horsepower does a 1972 Chevy 350 have?

Introduced in 1967, it was based on the same cylinder block design of many small block engines dating back to the original 265 C. I. V8 engine introduced in 1955. The 1972 Chevy 350 has about 270 horsepower stock.

How can I make my 350 small block faster?

How to Get More Horsepower Out of My Chevy 350 Small Block

  1. Modify your air intake.
  2. Modify your exhaust.
  3. Change your camshafts and valve train.
  4. Purchase new cylinder heads, or have yours ported and polished.
  5. Have your motor rebuilt and blueprinted.

Why did GM use the 4-bolt main on their cars?

Over the years, GM used the 4-bolt main as a marketing strategy to convince consumers that it was the right choice and it was for blocks made in the 1970’s. As consumers fell in love with the idea, engineers understood the concept, and GM’s car sales improved. Everyone was happy until the 1980’s rolled around and here’s what happened…

How many bolts on a crankshaft?

Some engines have 2 bolts or 4 bolts on each main securing the crankshaft to the engine. The good-old American theory: MORE IS BETTER!! Right?… in this case, NO.

How to tell if main motor is 2 bolt or 4 bolt?

If the motor has both of these there is a good chance that it is a 4-bolt main. but i did see a late model ’90 block out of a 1 ton truck with the 8″ balancer and the oil plug and it was only a 2-bolt, so your best bet is to look for an older truck. The ONLY way to be sure that it is a 4-bolt is to pull that pan.

Is a 2 bolt main block better than a 4 bolt?

If you have your mind set on a 4 bolt main block, find a 2 bolt block and order up a set of splayed caps. This will require align-boring the mains, though. The end product is much stronger than a factory 4 bolt block. If you’re building a healthy street engine, there’s nothing wrong with 2 bolt mains.