How to identify a 400 SBC crankshaft?
The 400 small-block Chevrolet (SBC) engine is a popular and widely used engine in the automotive world. Identifying the crankshaft of a 400 SBC engine is crucial for ensuring proper engine rebuilding and replacement parts compatibility. This article will provide a detailed guide on how to identify a 400 SBC crankshaft.
Identifying the 400 SBC Crankshaft
The 400 SBC crankshaft can be identified by several key features:
- Stroke Length: The 400 SBC crankshaft has a stroke length of 3.75 inches, which is longer than the standard 350 SBC crankshaft's 3.48-inch stroke.
- Main Journal Diameter: The main journal diameter of the 400 SBC crankshaft is 2.45 inches, compared to the 350 SBC's 2.10 inches.
- Connecting Rod Journal Diameter: The connecting rod journal diameter of the 400 SBC crankshaft is 2.10 inches, while the 350 SBC's is 2.00 inches.
- Casting Number: The casting number for the 400 SBC crankshaft is typically "3932442" or "3932442-1".li>
By examining these key features, you can accurately identify a 400 SBC crankshaft and ensure that you are using the correct replacement parts for your engine rebuild or modification.
Importance of Proper Crankshaft Identification
Correctly identifying the crankshaft is crucial for several reasons:
- Engine Compatibility: Using the wrong crankshaft can lead to issues with engine assembly, balance, and performance. Proper crankshaft identification ensures that you are using the correct replacement parts.li>
- Rebuilding and Modifications: When rebuilding or modifying a 400 SBC engine, using the correct crankshaft is essential for maintaining the engine's integrity and performance.
- Aftermarket Parts Compatibility: Many aftermarket parts, such as pistons, connecting rods, and balancers, are designed to work with specific crankshaft dimensions. Proper crankshaft identification ensures that these parts will fit and function correctly.
By following the guidelines outlined in this article, you can confidently identify a 400 SBC crankshaft and ensure that your engine rebuild or modification project is a success.
What is a 350 bored 60 over with a 400 crank?
With a 400 crank in a . 060 over 350 it would be a 388.
How do I identify my Chevy crankshaft?
Chevrolet crankshafts have a casting number located on the rough surface of one of the counterweights or between the bearing journals.
What years did Chevy make the 400?
| Chevrolet 400 | |
|---|---|
| Production | 1962–1974 |
| Assembly | San Martín, Buenos Aires, Argentina |
| Body and chassis | |
| Class | Executive car |
What was the last year of the 400 SBC?
The Chevrolet 400 was introduced in 1970, and used in full size (Impala, Caprice, etc. and midsize (Chevelle) through the 1976 model year. It was utilized in light duty trucks through the 1980 model year. They were quite common in early to mid 70's full size wagons.
How to tell the difference between a 350 and 400 SBC?
The 350 has just under three and a half inch stroke. The 400 has a three and three quarter inch stroke. And it also has a larger bore. The the bore size on a 350. Standard is four inches.
How do you identify a 400 SBC block?
Look at the sides of the block - if they're perfectly flat, it's a 305 or 350. If it's a 400, there will be small bulges around each cylinder, between 1/8" and 1/4" tall. Chevy only made 3 different casting numbers of 400 blocks - it'll have to end in 817, 509 or 511.
What is the specs of the 400 crank?
Additional information
| Weight | 54 lbs |
|---|---|
| Snout | Standard |
| Stroke | 3.480, 3.750 |
| Rod Length | 5.7 |
| Rod Journal | 2.1 |
How much HP can 400 SBC handle?
With our low-compression, power-adder friendly 400-inch small-block easily exceeding 525 hp, it was time for some boost. And that's where things start to get very interesting.
What's the difference between a 350 crank and a 400 crank?
The 350 has just under three and a half inch stroke. The 400 has a three and three quarter inch stroke. And it also has a larger bore. The the bore size on a 350. Standard is four inches.
How to tell if you have a 400 crank Chevy?
Re: How can I tell a 350 crank from a 400 crank? 3951529 casting # of a 400 crank is a good definitive way unless you have a way to measure accurately..... The 2.65" main journals of a 400 crank can be turned to the 2.45" diameter of a 350, or even to the 2.30" diameter of the early small journal cranks.
