Question: Why Is A 4 Bolt Main Better?

What does a 4 bolt main mean?

A 4-bolt main refers to the number of bolts attaching the main bearing caps to the block of an internal combustion engine.

Four bolt mains are considered much stronger for high performance use than a 2 bolt main..

Why is a 327 better than a 350?

A 327 with it’s shorter stroke would need shorter gears so it can GET to its revs, where a 350, with its slightly longer stroke and more torque output will pull a little taller gear than the 327 will.

How much horsepower can a 350 block handle?

With a stock block, using after market crank, rods, pistons, bolts, heads, etc., you could expect a small block 350 to make upwards of 450 HP and for it to reliably handle upwards of 550 – 600 HP, and a big block with the same aftermarket components to make power in the 500 to 600 HP area, and be able to handle upwards …

Why is a 383 better than a 400?

The 383 is meant to be a higher compression engine, using either the 5.7″ or 6.0″ rods. 400 uses a 5.5″ rod. The less oversquare you have in an engine, the more torque that’s produced.

Is a 400 small block better than a 350?

A small block 350 and a 400 have an identical block design. Most accessories will fit either engine. The major difference is found in the casting numbers and the way they are balanced. Most 350 cubic inch engines are internally balanced whereas the 400 engines are not.

How can you tell if you have a 350 4 bolt main?

Use the suffix code on the block and determine if the engine is original or not. That code can’t always tell you its a 4 bolt but if its the origianl motor in a 4 wheel drive 3/4 ton its almost a guarantee its a 4 bolt block.

Will 327 heads fit on a 350?

They are perfect for a 350. Both the 327 and the 350 have a 4″ bore so they like the same heads. Old heads like that will have softer valve seats, so if you want them to last a long time, you should either replace the seats or run leaded gas in the engine.

Can you put 400 heads on a 350?

The only difference is that 400 heads have steam holes drilled in them for the 400 block. You can put 400 heads on a 350 but you should not put 350 heads on a 400 without drilling the steam holes.

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

A 2-bolt main with aftermarket studs is stronger than a 4-bolt main block, less prone to crack, and can take up to 600 HP on a seasoned block. … Most of the engine builders online, including some big brands, will drill extra holes on their 2-bolt main blocks and it makes the mains weaker and more prone to cracking.

How much HP can a 4 bolt main 350 handle?

4 bolt 350 010 blocks can handle 1200 hp all day.

Can you convert a 2 bolt main to a 4 bolt main?

Registered. It’s not worth it to take a factory two bolt and turn it into a 4 bolt unless you know someone who owns a machine shop and can do the work for free. You can get a used four bolt block for way cheaper than the four bolt conversion parts and labor charges.

Is there a 327 4 bolt main?

They never made a 327 4 bolt main block. You can make one with a large journal 327 crank in a 4 bolt 350 block due to the same bore that they have.

What year is the best Chevy 350 engine?

L31 (2002) From a purely technical standpoint, the most recent version of the Chevy 350 would naturally be the best of the bunch. Marketed as the “Vortec 5700” engine, but known internally by the moniker of L31, this engine was used primarily in GM vans and trucks until 2002.

How much HP can a 350 make?

The Chevy 350 engine is a 350 cubic inch (5.7-liter) small block V8 with a 4.00 and 3.48 inch bore and stroke. Depending on the year, make and model of a car, horsepower ranges from approximately 145 to more than 370.

How do you tell a 327 from a 350?

The compression height of the piston (1.67 for a 327; 1.56 for A 350), or the casting number on the crankshaft should tell you what it actually is.