How much HP can a Chevy 400 handle?

How much HP can a Chevy 400 handle?

Registered. I agree 500 HP and 6000 to 6500 is max. Its not just the crank you need to worry about though. The stock 400 blocks are weak in the casting around the mains and are bad about cracking or busting.

How much horsepower does a Chevy 400 have?

In 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.

Is the Chevy 400 a good engine?

Evening all… the 400 is a great motor especially for street use. It has the power where you really need it. As far as overheating goes, make sure you have a good cooling system and you should be fine.

What is a 434 engine?

The Big Dawg 434 was born from street racers who requested a more streetable version of the company’s rowdy—and race oriented—765hp Sportsman 434. The result is a small-block the pushes the dyno needle to 700 hp but still runs on 93-octane gasoline.

What is a SBC 400?

The 400 CID Chevy small block engine was produced from 1970 until 1980 and was the largest displacement engine made in that platform. It was intended as a low performance, high-torque engine primarily used in Chevy’s heavier passenger cars and light-duty trucks.

Did Chevy make a 400 small-block?

400. The largest version of the Generation I small-block was the 400 (6.6 liter). It was the only engine available with both the 4.125-inch bore and the 3.75-inch stroke crankshaft. It debuted in 1970 and was produced for 10 years.

What did the small-block 400 come in?

The 400 saw extensive use in full-size Chevrolet and GMC trucks; K5 Blazer/Jimmy, 1/2-ton, 3/4-ton, 1-ton, and even larger ‘medium duty’ trucks had an option to be equipped with a 400. The engine was available in midsize A-Body and full-size B-Body passenger cars until the end of the 1976 model year.

How much HP does a stock 400 SBC have?

Its a 2 bolt 1970-1980 block that made 150-180 HP stock.

How much horsepower does a Chevy 400 engine have?

With timing and jetting maximized, the 400 managed to produce 458 lb-ft of torque at a still low 4,000 rpm, while kicking up the peak horsepower to just 401 at 5,400 rpm. As is typically the case with larger-port heads, we traded some low- and mid-rpm torque in exchange for much more horsepower farther up the rpm chart.

How much does 400 Chevy engine weigh?

– OE 400 block 565Lbs. – OE 400 block 550Lbs. – Complete 400: OE heads, aluminum intake, engine cradle 550Lbs. – Complete 400: OE heads, aluminum intake, engine cradle

What are the specs of a Chevy 400?


  • Mike Goble. Depends on the year,some were rated at about 165,I think the most was in the mid-200’s.
  • Philip. Actually until the rpm gets up into the 5k range horsepower is not what you are feeling,it is torque.
  • reo78rally.
  • StoveBolt.
  • reo78rally.
  • Bscman.
  • StoveBolt.
  • Stock72Nova.
  • 1975ssnova
  • What is the best small block chevy engine?

    LT-1 (1970)

  • L98 (1992)
  • L31 (2002)