Question: How Much Horsepower Would A Stock 400 SBC With Vortec Heads?

How much HP can a 4 bolt main 350 handle?

Standard 4 bolt mains are plenty mate.

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

Are Vortec heads better than double hump heads?

The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.

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 you get out of a 5.7 Vortec?

The HT383 that was available from GM uses Vortec L31 heads, the GMPP 383 shortblock and the Ramjet 350 roller cam with specs of 196°/206° duration at 0.050″ lift and 0.431″/0.451″ of lift on a 109° LSA produces 340 hp@4500 and 435 lb/ft of torque at 4000rpm.

How much HP do Vortec heads?

GM Vortec cylinder heads are used with a Comp Cams Xtreme Energy 262° camshaft to produce 390 HP and 426 ft-lbs of torque.

Is a 400 small block better than a 350?

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.

Can you put LS heads on a 350?

They will not fit. The bolt pattern is completly diffrent from a gen 1 to a gen 3. They are completely different engines so no, they won’t fit. However the SBC engine has more high performance parts available for it than any other engine.

How much horsepower do headers add to a 350?

The length of the primary tubing determines the effective rpm range, but headers can be worth 15-20 hp on the right application. Run on our restrictive two-barrel 350, the headers improved the power output to 248 hp and 365 lb-ft of torque, with consistent gains through the rev range.

How much HP does a 406 small block have?

Henderson Power Sports tops 600 hp with a 406-cube pump-gas hydraulic-roller Chevy 400 small-blockBY THE NUMBERS406 Chevrolet Small-BlockCompression ratio:10.5:1Camshaft:custom COMP hydraulic rollerValve lift:.725/.734 inch19 more rows•Dec 16, 2013

How much horsepower does a stock 400 small block have?

376 hpWith the stock Vortec heads, the low-compression 400 managed to make 376 hp and almost 450 lb-ft of torque.

Can you put LS heads on SBC?

Just to be clear: You can’t bolt LS heads on a Chevy small-block. You can’t even do it on one of World’s regular Motown blocks. … With the block designed to use LS heads and LS lifter positions, the engine must also be capable of accommodating an LS valvetrain.

How can I get more horsepower out of my 350?

No matter what application your Chevy 350 motor is in, a few simple steps can get you more better performance and higher horsepower.Modify your air intake. … Modify your exhaust. … Change your camshafts and valve train. … Purchase new cylinder heads, or have yours ported and polished. … Have your motor rebuilt and blueprinted.

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).

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.

How much HP does a stock Vortec 350 have?

Originally Answered: How much horsepower does a 350 Vortec engine have? Somewhere around the 240 HP region ( In stock as in installed trim ) . on a Dyno with no accessories on it they dyno at about the 300HP region. But the heads can flow well enough for 400HP.

How much horsepower can a stock small block Chevy 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 …

How much power can a stock 350 bottom end handle?

Re: How much can a stock bottom end handle Assuming it was correctly rebuilt, a completely stock bottom end – main bolts, cast crank, stock rods, cast pistons is good to around 350 HP.

Why are LS Motors so good?

Chevy knew what they were doing when they designed the LS engines. They designed an engine family that made good horsepower and good torque. … They aimed for the LS engine to produce usable low-end torque and great top-end horsepower. They also focused on small features like the cam size.