What is the difference between Ford 2V and 4V heads?

What is the difference between Ford 2V and 4V heads?

What is the biggest difference between the 2V and 4V heads? A: Starting with the basics, 2V heads are designed for use with a factory 2-barrel carburetor option (2V = 2 venturi), while 4V heads came on one of the five Ford 351C engine configurations that came with a 4-barrel carburetor (4V = 4 venturi).

How do you tell if you have 2V or 4V heads?

You can alwayss tell the 4V heads by looking at the exhaust port shape. 2V = true oval shape, 4V = almost square shape with an intrusion for the exhaust manifold bolt boss in one top corner.

How much horsepower can you get out of a 351 Cleveland?

Horsepower. The 351 was available as a two-barrel which was a basic engine and a four-barrel, or performance, engine. The two-barrel was rated at 240 horsepower while the four-barrel was rated at 285 horsepower.

Will 351 Cleveland heads fit on a 351 modified?

Hi dlone, 4V Cleveland heads will fit on a 351M (Midland) engine, but the ports are very much larger than the 2V ports in the 351M heads.

How can I tell if my Cleveland heads are 4V?

A 2V cleveland have a #2 in upper both corners of the cylinder head. A 4V have the #4 in the upper both corners of the cylinder head. If your heads is clevelandstyle but dont have the #2 or 4 its heads for the 400 or 351M.

What’s better 351 Cleveland and Windsor?

The 351 Cleveland is a member of the 335 series family of Ford small-block engines. Its large ports and oversize canted valves give it more horsepower and allow it to run at a higher rpm than the Windsor. The valve covers have a twisting curve and are attached by eight bolts.

What is the difference between 2V and 4V engines?

While the Apache RTR 160 2V looks larger, the RTR 160 4V has a more compact and sharper design. On the other hand, the RTR 160 2V’s 159.7cc air-cooled and fuel-injected motor uses a simpler 2-valve cylinder head. It makes more power in its BS6 avatar thanks to fuel injection.

How do I identify a 351 Cleveland head?

A 4V have the #4 in the upper both corners of the cylinder head. If your heads is clevelandstyle but dont have the #2 or 4 its heads for the 400 or 351M. They looks like 351C heads but is different with larger combustion chambers wich equals lower compression.

Can you put Windsor heads on a Cleveland block?

Will Windsor heads fit on a Cleveland block? they will but you’ll loose performance over cleveland heads.

How can I get more horsepower out of my 351 Cleveland?

It is all in what you want from your Cleveland. If you want highend horsepower, increase carburetor size conservatively in 50- to 100-cfm increments. If you want stump-pulling torque, go smaller in the 600- to 650-cfm range. Single-plane manifolds make sense for high-RPM use or when you increase displacement.

What heads will fit 351C?

The 351C 2V heads and M-block heads use the same size valves (2.04/1.66). The M-block head can be machined to use 351C 4V valves (2.19/1.71). The 351C and 400 pistons have the same compression height (dimension from wrist pin to top of piston), but the M-block wrist pin is slightly larger than the 351C wrist pin.

Are 351C and 351M heads the same?

Because the 351C and 351M/400M are from the same 335 engine family, many things are interchangeable. Heads are interchangeable with Clevelands so any stock Ford casting or aftermarket aluminum 351C head will work on a 351M/400M.

What kind of head does a 351 Cleveland have?

The 351C open-chamber head (2V and 4V) is a poor choice regardless of what you intend to do with your Cleveland. People associate this chamber with the smallport, 2-barrel head; however, it is also the 4-barrel head chamber for 1973–1974.

What are the different types of Cleveland cylinder heads?

351 Cleveland Cylinder Heads Guide: Factory Iron Heads 1 351C-4V closed wedge chamber, boss/high-output head (adjustable rockers with screw-in studs) 2 351c-2v open chamber (bolt-fulcrum) 3 351C-4V open chamber (bolt-fulcrum) 4 351C Australian head (2v ports with closed wedge chamber) 5 302C Australian head (smaller, closed wedge chamber)

What’s the difference between 351C and 302C iron heads?

Port sizing on this 302C Australian head is comparable to the North American 351C-2V head. What you get with the Australian 302C head is smaller, 57- to 59-cc chambers and higher compression. Casting numbers begin with β€œAR” along with a North American number on the valley side of intake ports.

What kind of intake port does a 351C-4V have?

The 351C-4V head has huge 2.50Γ—1.75-inch drive-through intake ports designed for high RPM use. Though the 4-barrel head is a factory iron piece installed on production vehicles, it was engineered primarily for racing. The same casting was installed on Boss 302 engines, except for water-passage differences.

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