How much horsepower does a 318 Poly have?

A two-barrel version of the 318 was rated at 230 horsepower, and the standard four-barrel was rated at 260, where they would stay through the 1962 model year.

What is a poly 318 motor?

318. The 318 is the most common version of the A engine, produced from 1957 through 1967 when it was replaced in all markets by the LA 318. Only Plymouth used this 318 in 1957 and 1958, but it was shared with the other Chrysler divisions from 1959 on.

What is a dodge poly engine?

The Polyspheric or Poly engines were V8 engines produced by Chrysler from 1955 to 1958 as lower-cost alternatives to the Hemi engines. These engines were based on the Hemi engines, using the same blocks and crankshaft parts, but completely different cylinder heads, pushrods, exhaust manifolds and pistons.

Is a poly 318 a big block?

Most commonly known as the “wide-block 318,” “big-block 318,” or “Poly 318,” official Chrysler nomenclature describes it as the A479 or A-series 318.

How much can you bore a poly 318?

See all 27 photos Buck says most 1967-’72 LA-series 318 blocks can safely be bored a full 0.105 oversize if sonic checks don’t reveal core shift. “In my research, the 318 (3.91 bore) and 340 (4.04 bore) share inner cylinder wall casting thickness. My bore recipe is essentially a 0.025-oversize 340.

Was the Chrysler 318 a good engine?

“The 318 was never a high-performance engine.” Maybe true, but we’ll show you how to make it one! The Good And The BadIn terms of durability, the Mopar 318 is robust. Two-barrel 318 engines were equipped with low-performance heads with small ports and valves.

How much HP does a 318 v8 have?

The 318 (5.2 Liter V-8) The power ratings of the new LA-series 318 were exactly the same as those for the old polyspherical-head design, 230 hp and 340 lb-ft.

What is the bore of a 318?

318 V8. The LA 318 was a 317.5 cu in (5.2 L) relative of the A 318. Like the A 318, it has a bore & stroke of 3.9062 in (99.2 mm) X 3.312 in (84.1 mm).

How much HP can a 318 handle?

A street-worthy 318 can easily make 400 horsepower, about what a lot of street 360s put out.

Is the 318 a good motor?

The Good And The BadIn terms of durability, the Mopar 318 is robust. The bottom end of most 318 engines used a cast-iron crankshaft, and though these are not as desirable as a forged crank, the cast-iron piece has proven to be very reliable.

How much power can I get out of a 318?

What is a Chrysler Valiant Charger?

The Chrysler Valiant Charger is a muscle car introduced by Chrysler Australia in 1971. It was a short wheelbase two door coupe based on the concurrent Australian Chrysler Valiant sedan.

Is the Mopar 318 Poly A good engine?

If you’re building for fuel economy, the 318 beats the Mopar 340 and 360, hands down. The 318 was produced in three versions: polysphere, LA series, and Magnum. Each are good engines, but for performance use, you should stick with the LA or Magnum because performance parts for the 318 Poly are hard to find. This article focuses on the LA version.

What kind of engine is a 318?

The 318 was used as a police engine, mainly in the M-bodies ( Diplomats and Gran Furys ); it was, in most years, the largest engine available in four-door Valiants. With the 340 and 360 around, the 318 kept its “economy carb” from 1968 through 1978, when it got a four-barrel option to make performance acceptable with California emissions systems.

What kind of engine does a Dodge Valiant have?

In the United States, where only the V8 was considered to be capable of any performance, the Valiant quickly gained a small V8 engine designed with the small car in mind — the 273 V8. This engine was based on the existing A-series V8 engines, but was considerably lighter, hence the designation LA — Lightweight A.