Can you put 454 heads on a 396?
Can you put 454 heads on a 396?
All big block heads will bolt up without problems with the valves hitting anything. I would advise against putting 71 and up 454 heads on a 396 since they have open combustion chambers unless you have a big dome like the factory 396/375hp piston.
How much horsepower can a 396 make?
The average power numbers from 4,000 to 6,250 rpm (where it carried over 400 lb-ft of torque) were 438 hp and 450 lb-ft of torque. While power peaked at a high 6,400 rpm, low-end torque was still plenty respectable with the motor peaking 483 lb-ft at 4,700 rpm.
Are 396 and 454 blocks the same?
396 is is pretty much the same as a 400 sbc, but heavier duty. A 454 is a stroked 427. The 454 has the most potential due to its size, and aftermarket support.
What are the best small block Chevy heads?
Peak Torque and Horsepower
| Cylinder Head | Peak Horsepower | Peak Torque |
|---|---|---|
| Dart | 419 at 6,200 rpm | 417 at 4,200 rpm (2) |
| Jeg’s | 408 at 5,900 rpm | 421 at 4,300 rpm (1) |
| Summit | 405 at 5,900 rpm | 416 at 4,400 rpm (4) |
| Edelbrock | 395 at 5,900 rpm | 409 at 4,200 rpm (5) |
What are double hump heads worth?
RIP: 2/16/2019. 461 and 462 double hump complete heads should be worth or priced at $200 a set at the very least. With all the choices in new motors and heads these do not have the interest they once had.
How much horsepower does double hump heads add?
25 horsepower
How much horsepower can you get out of a 327?
Rated at 375 hp, the fuel-injected 327 was a high-winding screamer, as satisfying to drive as any big-block. At the other end of the spectrum, the 327 was also offered at much more pedestrian power levels, as low as 210 hp (gross).
Is the Chevy 396 a good engine?
The 396 is a good revving engine, so you’d want to run a steel crank so it would live at the rpm you’d have to run it to make HP. And probably a roller cam, as flat tappet cams in big blocks have a nasty habit of “going away” relatively easily.
Can you put 5.3 heads on a 5.7 block?
Yes, they’re a direct bolt on. The advantage is that they have a smaller chamber, and bumps up the compression. The down side is that they have small valves. You can port them as much as you want, but unless you put bigger valves in they won’t flow as well as stock 243’s.
What is the difference between Vortec heads and regular heads?
The intake valve seat of the Vortec head has a three-angle grind straight from the factory and the combustion chamber design is a radical departure from former GM heads utilized in the market. The regular 350 head utilizes a 90 degree intake bolt angle while the Vortec makes do with a 72 degree bolt angle.
Are aluminum heads better than iron?
Both types of heads can be damaged if the engine overheats. Cast iron is much more durable. However, aluminum heads are easier to fix. The metal is softer and easier to weld and machine.
Are Vortec heads 23 degree?
GM Performance’s New Vortec Heads Promise Big Flow Numbers For A Modest Investment. GM Performance responded with the 23-degree, aluminum Fast Burn head. Its 210cc intake runners and raised intake valves made it capable of supporting more than 500 hp.
What is the difference between 18 and 23 degree heads?
The 18 degree heads are also taller than their 23 degree cousins, and require longer valves and special head studs. Eighteen degree pistons with domes and valve reliefs matched to the combustion chamber shape and valve locations are needed.
What heads should I put on my 350?
The more cubic inches the engine has, the more airflow the heads have to deliver. A head with 180 or 185cc intake runners will work well on a typical 350 Chevy street engine that makes 400 to 450 horsepower.
How do you get 600 horsepower out of a 350?
You can’t get 600 HP out of a 350 running standard pump gas. If you increase the cubic inches, then of course, the power will go up as the cubic inches increase because the engine can burn more fuel per revolution. Again, making power is a no brainer.