Question: Can You Convert A 2 Bolt Main To A 4 Bolt Main?

How much HP can a 4 bolt main 350 handle?

1.

4-bolt blocks with OEM main bolts are good to 475 HP, and are good to 7200 RPM.

2..

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.

What does 6 bolt main mean?

6-bolt main refers to the number of bolts holding the main caps to the block of an internal combustion engine, and therefore holding the crankshaft in place. A main cap refers to the locating support for the crankshaft of a piston engine.

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.

When did Chevy stop making the 327?

The last iteration of the 327 appeared in 1969 with a two-barrel carburetor and a 9-to-1 compression ratio that produced 235 horsepower and 325 foot pounds of torque, but by then another Chevrolet small-block had already appeared on the market and had begun stealing what thunder the 327 had left.

How much power can a 454 block handle?

MonzaRacer. As for big block Chevy a factory 2 bolt 454/427/402 block with out large over bores will easily and safely handle 700+hp/torque, and never discount the cast cranks As I have seen 600-700 hp on cast cranks, they just dont like shock loading quite as much as sbc will take,,tend to have reliability issues.

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

Any time you increase horsepower, torque and cylinder pressure, you increase crankshaft load. It would take quite a bit more stress to rip-out 4 bolts than it would just 2, so that’s why the 4 bolt mains are stronger than the 2 bolt mains.

How do you make a 2 bolt main stronger?

Sometimes you can’t get a block with 4 bolt mains so a way to make a 2 bolt main block even stronger than a typical 4 bolt block is to use a “main support”. This is a brace that bolts across all 5 main caps, thus tying them all together and sort of creating a 10 bolt main engine.

How do I know if I have a 2 or 4 bolt main?

A four bolt main block will have four bolts that secure the main bearing caps to the block. A two bolt main block will have only two.

What is the difference between a 2 bolt and a 4 bolt 350?

Two bolt means each main cap uses two bolts to hold it down. Four bolt means there are four, which means more clamping force, and less likelyhood that the crank is going to push itself out of the bottom of the engine at high RPM / power. Here is the “splayed” 4-bolt mains. These are always aftermarket.

Are 327 and 350 pistons the same?

350 Pistons?? Smokie, the 327 has a stroke of 3.250″, while the 350 has a 3.480″ stroke. Both engines use 5.700″ rods and 9.025″ block height (undecked). So the difference is in pin location relative to the top of the pistons (compression height).

How much horsepower can a 2 bolt main 350 handle?

Stay away from the 2-piece rear 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.

How much horsepower can a 2 bolt main 454 handle?

The 2 bolt Big Block Chevy blocks are fine for anything up to 6500 RPM and 600 HP.

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.

What is a 4 bolt main block?

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.

What is the stock stroke on a 454?

454. For 1970, the Big-Block was expanded again, to 454 cu in (7.4 L), with a bore x stroke of 4 1⁄4 in × 4 in (108.0 mm × 101.6 mm).

Is there a 327 4 bolt main?

Never any 327 Large Journal 4-bolt engines in cars, that is a fact. They can be built with a LG 327 or 307 Crank and a 4-bolt 350 (4″ bore) block.