Quick Answer: Is A 400 Small Block Better Than A 350?

What size heads for 400 SBC?

A hot 400 SBC can easily use a head with 200+ cc intake port volume..

Can you put 400 heads on a 350?

400 heads on a 350 block is a great way to increase your midrange and top end power. The swap is a direct bolt – on deal, you just need to be sure to use 400 head gaskets when you do the swap.

What vehicles came with a 400 SBC?

The 400 small block Chevy was produced from 1970 until 1977. It was originally installed in big sedans and wagons, but later found its way into some trucks. I don’t believe it was ever put in the Chevelle or Camaro. A co-worker has a very healthy 400 in his ’88 Corvette.

How much does it cost to bore a 350 to a 383?

The machine work is usually in the $250~300 range for bore & hone to size ( including cam bearing install if desired). Bottom edges of block may need light relieving to clear rod bolts.

What is a 350 bored 60 over with a 400 crank?

60 over with a 400 crank is around a 388.

How much HP does a 383 stroker make?

That combo would probably make around 465 hp and nearly 500 lb-ft, but at less rpm. But never mind that. The point here is 502 lb-ft at 4,700 rpm and 500-plus horsepower from 5,700-6,200 rpm….Hot Rod’s Proven Recipe For A Simple Chevy 383 That Knocks Down 500 HP And 500 LB-FT.True 383 PowerRPMLB-FTHP6,20042550222 more rows•Oct 13, 2009

Why is a 383 better than a 400?

A 4.030 bore 350 block will give you 383 with a 3.75″ stroke crank. The SBC 400 has a much larger BBC sized bore of 4.125″ so it is bigger and better than the smaller bore motor (it has a bigger crank journal as well as being designed from the ground up for a 3.75″ stroke).

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 can you bore over a 350?

For a street engine, with a production 350, 4.030″ is the max for any power adder. for low-rpm torque, 4.080″ is okay. If you fill the water jackets with filler, a tall-fill for racing will give a 350 block a max bore of 4.125″. No production 400 should ever go past 4.185″, even with a tall-fill.

Which is better a 383 or 406?

If you were to build 2 motors, identical except that one was a 383, and the other was the 406, the 406 will make more power across the entire rpm range. Achieving you power goals at lower rpms means less stress on the internal components, which usually translates into longer engine life.

What is the most powerful small block engine?

LS9 engineThe most powerful small block ever produced is the LS9 engine used in the current Corvette ZR1. It is rated at 638 horsepower, making it the most powerful engine ever produced by GM for a regular-production car.

What is the best small block Chevy engine?

The 327 L84 remained the most powerful Chevrolet small block production engine ever until the quad-cam LT5 came out in the 1990s. And it was the most powerful naturally-aspirated single-cam small block until the arrival of the LS6 engine in the early 2000s.

Is a 400 small block a good motor?

Overall, the 400 SBC is a really good block. They do come with a bit shorter connecting rods (5.565″ compared to 5.700″ for the 350) than do most of the other SBC engines out there.

How many horsepower does a 400 small block have?

401 hpIn case you missed the story, the best power numbers were gained with a set of GM Performance Parts Vortec heads supplied by Scoggin-Dickey, and even then the 400 small block Chevy managed only 401 hp and 458 lb-ft of torque.

How much HP does a cam add to a 350?

Replacing the 2G with a Q-Jet and intake alone can be worth 25-30 hp. Toss in a mild cam and cylinder head upgrade and the power gains really start to add up.

Do you need steam holes on 400 SBC heads?

[edit] Introduction. The SBC 400 block was designed with steam holes in the deck and heads. … SBC heads with steam holes can be used on other blocks without problem by using a 350 head gasket.

How can I get more horsepower out of my 350?

How to Get More Horsepower Out of My Chevy 350 Small BlockModify your air intake. This can be done in a variety of ways, from simply installing a K & N air filter to installing a complete cold-air-intake system. … Modify your exhaust. … Change your camshafts and valve train. … Purchase new cylinder heads, or have yours ported and polished.

Can you put 305 heads on a 350?

305 heads on a 350 will raise your compression a good deal, maybe even too much for pump gas if you have flat tops or domed. I would go with 350 heads if I were you. If you have flat top pistons a set of 350 heads would be best.

How much HP can a stock 400 SBC crank handle?

Registered. 400 cranks are nodular iron and will handle 500 hp easy.

Are stroker engines reliable?

A few years ago stroker motors weren’t very reliable but with testing and redesigning now they are almost as reliable as a stock motor as long as you treat them right.

How much HP do heads add?

A set of heads for your car will probably set you back $700. Your engine probably won’t breath much better because of your cam, the smaller combustion chamber might bump your compression up a couple of points. You might get 20 hp or so.

What CI is a 350 bored .60 over?

Re: What is total displacement of 350 bored .060 over 4.06 x 3.14 = 12.758 x 3.48 = 44.364 x 8 = 354.915 or 355 cid.

What is the best 400 SBC block?

The 509 is one of the best 400 blocks to use because of the high nickel content and is probably the strongest of the stock 400 blocks. Becareful when you buy it check the boresize on it and make sure you will not have to bore any larger than 30 thousandths over stock bore.

How much to turn a 350 into a 383?

You can put a 383 together to handle about 400-450 horses for probably $1500-$1600. That would be a short block. It’s probably possible to build it for around $1200 everything off a 400 and 350 except for new pistons, rings, and bearings.