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 Mopar Poly 318?
The predecessor to the later LA engines, the Poly was an A engine that had several displacements: 277, 301, 303, 313, 318, & 326 cubic inches, the more popular engine that you will hear about is the 318.
What is a poly 318 V8?
From 1957 to 1966, Dodge made the 318 polyspherical engine, or the 318a. It was modelled on the popular Hemi engine. The Poly differs in that it is a small block and its heads are polyspherical rather than hemispherical1. The spark plug is located at the focus of the parabola.
What is a Mopar Polysphere?
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.
Is the 318 a good engine?
The 318 engine is absolutely the best all-around small block Mopar, in my opinion. It can easily make 400-plus horsepower and still has great street manners. 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.
Is a Mopar 318 a good engine?
How much HP does a 318 V8 have?
230 hp
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 cubic inch is a 318 bored 30 over?
If you bored your 318 block . 030″, leaving you with a bore of 3.940″, and installed a 4.000″ stroke rotating a$$embly in it, that would net you 390 cubic inches.
Is a 318 a Hemi?
No, the 5.2-liter Chrysler 318 is not a HEMI, though HEMI motors were available during the LA-series engine era.
Is a 318 A big block?
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.
What is a Chrysler poly 318?
Considered the “yank it out and put in a big block” engine, most people who have a poly 318 have heard it all. The Chrysler Polysphere, named for it’s polyspherical combustion chamber, was produced from 1956 to 1966 here in the states, and until 1967 in Canada. It had a similar design to the HEMI, but was less costly to build than the HEMI.
What was the horsepower of a 318 La Poly 318?
To put some numbers together for you, in 1957 a factory dual quad Poly 318 was rated at 290 hp! A single 4-bbl was rated at 260 hp in 1962, and that same year a 2-bbl was rated at 230 hp. So what was the horsepower rating for a 318 LA motor that replaced the Poly?
Is the Mopar 318 a good engine?
The performance was better than the LA that replaced it, but it was a very heavy engine that didn’t have a lot of performance parts available for it. The Mopar 440 big block was just a few pounds heavier, so this 318 was quite a heavy engine considering.
What is the performance of a 318 Poly cylinder head?
The canted valves of the Poly cylinder head are similar in design to the HEMI. The performance was better than the LA that replaced it, but it was a very heavy engine that didn’t have a lot of performance parts available for it. The Mopar 440 big block was just a few pounds heavier, so this 318 was quite a heavy engine considering.