What is the Mopar 318 Magnum firing order?
a simple animation showing the firing order of the LA series smallblock Chrysler, 273, 318, 340, 360.
How much HP does a 318 Dodge Magnum motor have?
It produces 234 PS (172 kW; 230 HP) at 4,100 rpm of horsepower and 400 N·m (40.8 kg·m, 295 ft·lb) at 3,000 rpm of maximum torque. The 318 Magnum engine has a cast-iron block with a five-bearings crankshaft supported system. by Scott Eilers.
What size is a 318 engine?
What size is a Dodge 318 motor? 5.2 L 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). What year did dodge introduce the 318? Birth of the 318 The 273 set the stage for the 318, which was introduced in 1967.
Is 318 a composite number?
Yes, number 318 is a composite number. Three hundred and eighteen is a composite number, because it has more divisors than 1 and itself. Is 317 A Composite Number? Is 319 A Composite Number? Is 318 A Prime Number? No the number 318 is not a prime number.
How much horsepower does a 318 Magnum have?
477 horsepowerHigh-tech and common sense together appeared to be a good combination, as his little 323-cubic-inch engine pounded out 427 foot pounds of torque and 477 horsepower!...BY THE NUMBERS323CI SMALL-BLOCK MOPARCylinder head:Mopar Performance R/T MagnumIntake valve diameter:2.020-inchExhaust valve diameter:1.600-inch30 more rows•Jan 1, 2009
What is the difference between the LA 318 and a Magnum 318?
I looked on Wikepedia, it says the LA 318 is 150 horse power. The Magnum 318 is stated to have 230 horse power. Seems like a decent upgrade, although not as much horsepower as the 360 swap, I would think it would be a noticeable improvement over my tired LA 318. BTW, the Magnum 360 is rated at 250 horsepower.
Is the 318 Magnum a V8?
It is essentially a six-cylinder version of the 318 V8. Output was 125 hp (93 kW) and 195 lb⋅ft (264 N⋅m) until it was replaced by the Magnum 3.9 starting in 1992. In 1987 it used a two-barrel Holley carburetor and hydraulic tappets.
How much horsepower does a 318 Dodge motor have?
Build A 400-Plus-Horsepower Chrysler 318 On A Working-Man's Budget.RPMTQHP3,4003512313,6003652533,8003742744,00037929315 more rows•Sep 4, 2008
How can you tell the difference between a 318 and a 360 magnum?
There is a casting number on the side of the block behind the starter that will look something like this XXXXXXXX-318-XX. The displacement is the 3 numbers between the 2 dashes, i.e. 273, 318, 340, 360. Chances are you have a 318 since they were far from gutless, even in the '70s. Hope this helps.
Can I put Magnum heads on a La block?
I put EngineQuest magnum heads (factory replacement head) on an LA block, with flat tappet cam. They offer a magnum head with LA intake manifold bolt pattern and LA style thermostat bypass hose. Everything fit great.
Is the 5.2 V8 Magnum a good engine?
The 5.2 Magnum used in Dodge trucks and Jeeps is a pretty solid engine. It doesn't suffer cylinder head cracks to the same extent that the 5.9 Magnum does. Additionally, the internals and major engine components seem to be fairly strong and adequate for good longevity at stock power levels.
When did Dodge stop making the 318?
The 318 (5.2 Liter V-8) US-built trucks may have used the A-series as well, but production was definitely closed by 1968 (Thanks, Marcus Reddish). 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.
Is a 4.7 liter engine a 318?
The 4.7-liter V8 engine found in Dodge vehicles is also known as the Powertech engine. It is the innovation of Dodge's parent company Chrysler. It set out to replace the legendary 318 cubic-inch pushrod small-block V8.
Does Chrysler still make the 318 engine?
The Dodge 318 V-8 engine was produced by the Flint, Michigan-based Chrysler Corporation, now Chrysler LLC, from 1967 to 2002.
Is a 318 A small block?
The other side of a decent quench quest is the cylinder heads, but the majority of small-block Mopar heads are of the open-chamber design, limiting our choices in production heads....A 400hp Bolt-Together Chrysler 318.Dyno ResultsMopar 3186,0003983486,2004003396,5003933188 more rows•Jan 1, 2004
What cars had the 318 engine?
The Plymouth Valiant, Barracuda, and Duster, as well as the Dodge Dart, offered a 318 in their lineup and the true abilities of the engine started to shine. The lightweight V8 offered a performance V8 sound and feel that matched the lightweight body and frame of the compact A-body cars, making it a perfect fit.
Why did Adney choose a Mopar 318?
He chose a Mopar 318 engine with a mix of old and new technology. His decision was based in part on the design benefits inherent in the engine. Adney also candidly admitted he thought no one else would build a 318.
What type of intake gaskets do Magnum engines use?
The engine uses a Professional Products dual-plane intake sandwiching Fel-Pro Performance intake gaskets. Regarding the use of an early-style gasket on the late-model heads, Adney set the record straight: "They say the Magnum heads are supposed to use a different gasket from the regular heads. I found out that the regular gaskets, the 1243 Fel-Pro's, work just fine. The only thing you have to do is slot the boltholes. It works better than any other gasket they've got." The slotting is necessary due to the fact that the Magnum intake boltholes go straight up and down, whereas the early-style holes are perpendicular to the intake manifold face.
What cylinder heads did Adney use?
Moving up higher on the engine, Adney used a set of Mopar Performance R/T Magnum cylinder heads, sourced from friend Randy Malik, owner of RM Competition. Randy "knew a guy who knew a guy," so they ended up with a set of former Super Stock heads that were in great shape. When asked about modifications, Adney responded: "They were ported when we got them; we just touched them up a little bit." Apparently, they were ported pretty well. (If we were to duplicate this buildup, we'd reach for a set of Engine Quest's iron Magnum heads, which will get you in the ballpark with minimal machinework and porting.) LS1-style Chevy valves were installed, along with a set of COMP Cams beehive springs and retainers. The combination worked great, as there were no signs of valvetrain instability with the tach climbing to 6,500.
What engine did Adney Brown use?
With a 10.5:1 compression ratio limit, 91-octane pump gas, and a mandatory flat-tappet cam, Adney had to find an engine with a good basic foundation to build from. He chose a Mopar 318 engine with a mix of old and new technology. His decision was based in part on the design benefits inherent in the engine. Adney also candidly admitted he thought no one else would build a 318. High-tech and common sense together appeared to be a good combination, as his little 323-cubic-inch engine pounded out 427 foot pounds of torque and 477 horsepower! Big-block numbers from the smallest of small-blocks.
Where is the Adney crankshaft made?
Adney owns and operates Performance Crankshaft in Roseville, Michigan, not far from Ground Zero of the automotive world: Detroit. Being a crankshaft guy, Adney knows the good and bad of OEM and aftermarket offerings, and chose to use a factory 340 forged crank for this build. The 273, 318, and 340 cranks all shared the same basic dimensions-stroke, rod journal, and main journal size-and he could have used any of them to get his final 323 cubic inches. The 318, and later-model 340 cranks, were cast iron, limiting their use in the high-performance arena, but the '68-72 340 engines use beautiful forged cranks with lightening holes, and Adney had access to a perfect donor. He explained some of his modifications: "It was a 340 crank we lightened up ... bullet-nosed the leading edges, and knifed the trailing edges." This aerodynamic modification allowed the crank to spin through the crankcase with much less resistance, reducing parasitic power losses.
What is the problem with a 318 magnum?
Just like its 5.9L big brother, the most common problem on the 318 Magnum is a leaking plenum gasket. The intake manifold on the Magnum engines is built in two pieces, a stamped steel plate is connected to the cast aluminum manifold. A plenum gasket, also referred to as a belly pan gasket, connects the plate and the manifold together.
What year was the Chrysler 318 made?
However, the 318 Magnum is not to be confused with its predecessor engine, the Chrysler LA 318. The LA 318 was produced from 1967 until 1991. The 318 Magnum is an upgraded version of the LA 318 and was given the Magnum name by the marketing department. The 5.2 Magnum produced 230hp and 295 lb-ft. of torque.
How long does a 5.2 Magnum last?
Age is certainly a factor in reliability and old engines will require more maintenance and overall repairs. The 5.2 Magnum can last to 300,000 miles and onwards, but expect to end up replacing a number of parts before you hit this mileage. You will certainly need a transmission rebuild.
What is a 5.2 magnum?
Launched in 1992, the 5.2 Magnum is a naturally aspirated 5.2L V8 engine produced by Chrysler. The engine was predominantly used in Dodge trucks and Jeep Grand Cherokee’s from 1992 until 2003 when it was replaced by the Hemi. The 5.2 Magnum is also commonly referred to as the 318 Magnum due to its 318 cubic inches of displacement.
Where does the ticking sound come from on a 5.2 Magnum?
On the 5.2 Magnum, a lot of owners have reported a ticking noise coming from the engine bay area. While most peoples initial reaction is that the sound is lifter tick, it is actually from the exhaust manifold.
Is a 5.2 magnum more reliable than a 5.9 magnum?
Despite being a very similar engine mechanically and design-wise, the 5.2 Magnum actually tends to be more reliable and have less common problems than the 5.9 Magnum.
Is a 5.2 Magnum a good engine?
Additionally, the internals and major engine components seem to be fairly strong and adequate for good longevity at stock power levels.
What is the difference between Magnum and OEM?
As noted earlier, the major difference with a Magnum package is the valvetrain. Naturally, Magnum specific rockers are need. The OEM rockers are actually a very good design, suitable for milder street performance applications. The aftermarket also has rocker kits, available from sources such as Crane and Comp Cams.
How does a magnum work on a Mopar?
The Magnum system utilizes rockers that are individually mounted on paired pedestals. Oil to the rockers is provided through the pushrods via the lifter, much like a small-block Chevy. The Magnum rockers feature a ratio of 1.6:1, providing an increase in valve lift of almost 7 percent, compared to the 1.5:1 ratio used on the LA engines. Early Magnum blocks still came through with the oil passage for the LA-style valvetrain oil feed, which simply terminates at the heads' deck. Obviously, the heads did not have a valvetrain oiling provision. These blocks can accept either LA or Magnum style heads interchangeably. Later magnum blocks still carry the boss for the oil provision, but are un-drilled, precluding traditional heads from being installed without modification.
Do you need a magnum valve cover for a magnum head?
Magnum valve covers are needed to work with the Magnum heads, since the number of attachment bolts are doubled for better sealing. OEM valve covers are a decent choice, but for a little more flash, Mopar Performance carries nice cast aluminum covers. The swap to a Magnum top-end is really a bolt-together deal on an LA engine, which shouldn't be too surprising, since that's the way Mopar essentially did it in the first place.
Is the Magnum crate engine interchangeable with the LA engine?
Magnum engines did, however make some inroads into the traditional performance world, thanks in part to the direct interchangeability with the earlier LA engines on which they are based. Mopar Performance offered the Magnum crate engine for years in performance trim, and these engines were fully interchangeable with the earlier units.
Does the 340 Magnum have the same oil pan as the 360?
With the Magnum, the 5.2 was standardized to accept the same pan as the 360.
Do you need a magnum intake manifold?
With the Magnum's vertical intake mounting pattern, a Magnum-specific intake manifold is required . There are those who have gotten around this problem with custom modifications to change the bolt pattern on the Magnum heads, or revising the intake bosses. There are several good aftermarket choices in Magnum carbureted intakes, making bolt-on manifolds readily available. Mopar Performance has both dual- and single-plane intakes available for the Magnum heads, and Edelbrock has recently introduced their excellent Performer RPM Air Gap for this application. Professional Products has a manifold that has a dual bolt pattern, which fits both Magnum and traditional LA heads. You'll need to get intake manifold gaskets for the Magnum application, to match the revised bolt pattern.
How much horsepower does a 318 have?
Suffice to say that the stars were aligned for the 318, and all the design specifications come together to produce an engine with excellent power potential for its size. A street-worthy 318 can easily make 400 horsepower, about what a lot of street 360s put out.
What pistons are best for a 318?
Hyperteutectic pistons are most likely your best choice for a high performance street or mild (no nitrous) racing engine. Hypereutectic pistons for the 318 are available from Speed Pro and Keith Black. The Speed Pro pistons cost $147.12 for a set from Summit Racing. They are more of a stock replacement style piston, but will give you a little higher compression ratio than either of the cast piston choices for not too much more money. They are also much stronger than regular castings and have a friction reducing coating on the skirts. If I were building a budget 318, these would be my pistons of choice. For a high performance street 318 I like the KB167 piston from Keith Black. It's still a flat top, but with a higher deck height than the Speed Pro hypereutectics. It will give you a compression ratio between 9.2:1 and 10.4:1 depending on what heads you're running. They're also heat treated to T6 hardness, making them very strong. They cost $310.69 from Summit and are in my opinion the best pistons to use in a street engine.
What is the replacement for the 273 on a 66 Barracuda?
When the engine in my 66 Barracuda needed to be rebuilt, I decided to replace the stock 273 with a modified 318. Forty five extra cubic inches equals lots more torque and horsepower, and the 318 is a bolt-in replacement for the 273. I'm running 302 head castings with 1.88/1.60 valves and mild porting, KB hypereutectic pistons (10.5:1 compression with my heads), Comp Cams 268H cam, stainless steel roller rocker arms, Weiand Action Plus intake, Edelbrock carburetor, and SSI headers.
What is the strongest piston?
Forged pistons are the strongest pistons available, and therefore the best, right? Probably not, at least not for a street engine. While it's true that forgings are the strongest, they are also the most expensive. Also, because forged pistons expand more than cast pistons, they must be installed with a larger piston to wall clearance. This allows the piston to rock slightly in the bore when the engine is cold, which is noisy and also affects oil control. There are some very good reasons to run forged pistons, but most of them don't apply to a street engine, not even a really hot Street 318. Unless you're running big shots of nitrous or lots of boost, you'll probably be happier with a set of KB167's. If you DO need forged pistons for you application, I'd suggest skipping the less expensive offerings from Keith Black, TRW, etc., and going with a good set of custome forgings from Aries, JE, Mahle, Ross, Wiseco, etc.
How long can a Mopar 318 run in a quarter?
Hot Street—Yes Virginia, a Mopar 318 can run 12 seconds in the quarter and still exhibit good street manners.
What is the best small block Mopar 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.
Why is my intake running with 318 ports?
Running a large port intake with 318-style ports causes a "damn" in the intake path where the intake mates to the head because of the port mismatch. Most intakes designed for the 318 ports are economy type manifolds that aren't really intended for high performance.
Rockerdude Rock n' Roll and A-bodies
Magnum motors are great upgrades over the la motors IMHO. Roller cam, better heads, and its a bolt in deal. Plus there's tons of them out there.
bighammer Well-Known Member
Also the Magnum 318 has the roller cam, just like the Mag 360; just thought I would mention that in case anybody wondered about it.
273 Well-Known Member
That's what they are rated, I think the extra 80hp come from better flowing heads and exhaust, but think the difference would shrink if you put the same carb, intake and exhaust on both of them.
rumblefish360 I have escaped the evil Empire State! FABO Gold Member
The HP ratings will vary a lot through our the years for the 318. Research the issue.
moper Well-Known Member
It's a much better technologically designed engine. But - it also uses the lower parasitic loss alternator, P/S pump, etc and has much better exh manifolding - all of which is included on the tests. So a "230hp Magnum" when outfitted with the older accessories and LA manifolding will probably make about 200hp.
Prine A-Body Fanatic
I hate "ratings"......its BS.....150hp is not what a stock 318 Longblock is capable of....its how it came STOCK....2bbl, smog pump, single exhaust system through a catalytic convertor.
64drtGt Slant Six Lunatic
I hate "ratings"......its BS.....150hp is not what a stock 318 Longblock is capable of....its how it came STOCK....2bbl, smog pump, single exhaust system through a catalytic convertor.
How big is the LA 318?
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). It appeared shortly after the 273, in 1967, and proved tremendously successful. The LA engine was available until 1991 when it was superseded by the Magnum version (See below).
What year did Chrysler make the 318?
In the mid-1960s , Chrysler decided to adapt the 318 cu in (5.2 L) small block V8 into a lightweight, high output engine equally suited for drag strip or street performance use. Its block was bored out to 4.04 in (102.6 mm) but 3.31 in (84.1 mm) stroke left unchanged, resulting in the 340 cu in (5.6 L) engine introduced for the 1968 model year. Anticipating higher loads resulting from racing operation, the engineers fitted a forged shot peened steel crankshaft instead of the cast nodular iron unit used in the 318. This also included shot peened hammer-forged steel connecting rods and high compression cast aluminum pistons with full floating pins. A 4-barrel carburetor was mated to a high-rise, dual plane intake manifold feeding high-flow cylinder heads that are still considered among the best of that era. Its big ports used 2.02 in (51 mm) intake and 1.60 in (41 mm) exhaust valves. An aggressive cam was fitted to take advantage of the much better breathing top end. The 1968 4-speed cars got an even hotter cam, but it was discontinued for 1969, where both automatic and manual cars shared the same cam. The engine was equipped with hydraulic lifters and two bolt main bearing caps, leading some to initially underestimate the 340's potential. The 1968-'71 340's compression ratio was 10.5:1, placing it near the limit of what was possible on pump gasoline during that era. The 340 also used additional heavy-duty parts, such as a double-row roller timing chain and sump-mounted windage tray. Power output was officially stated as 275 hp (205 kW) gross for the 4 barrel.
How to tell a bare magnum from a LA?
The easiest way to differentiate a bare Magnum block from a LA is by checking for the presence of the two crankshaft position sensor mounting bosses on the right rear top of the block, just to the rear of the cylinder head deck surface. Bosses = Magnum.
How much horsepower does a 5.2 Magnum have?
At the time of its introduction, the 5.2 L Magnum created 230 hp (172 kW) at 4,100 rpm and 295 lb⋅ft (400 N⋅m) at 3,000 rpm. Production of this engine lasted until 2002, when it was completely replaced by the newer 4.7 L PowerTech SOHC V8 engine.
How much horsepower does a 340 have?
In 1970, Chrysler offered a special Six-Pack version of the 340 with triple 2-barrel carburetors rated at 290 hp (216 kW) gross that was specific to Challenger TA and Cuda AAR models.
What year was the 273 V8?
273 V8. The 273 cu in (4.5 L) was the first LA engine, beginning model year 1964 and offered through 1969, rated at 180 hp (134 kW). It had a bore and stroke of 3.625 in × 3.31 in (92.1 mm × 84.1 mm).
When was the 340 detuned?
It remained a high performance engine through 1971, but was de-tuned in 1972 with the introduction of low compression (8.5:1) small valve heads, and by mid-year, a cast nodular iron crankshaft, and a variety of other emissions related changes. For the 1974 model year it was replaced by the 360 cu in (5.9 L) engine.
What year was the Dodge Charger 318?
The first Dodge Charger in 1966 was available with the 318 A, but it had some stiff competition because that was also the first year that you could get the famed Street HEMI. The real difference between the A series and LA series engines are the cylinder head and valvetrain designs.
Where does Poly 318 valve cover come from?
The only aftermarket valve cover you can get for your Poly 318 comes from Australia. A closer look while under the hood, the scallops in the valve covers were different and the assumption was made that the guy lied about it being a 318.
How much horsepower was a 1957 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? In 1967, a 318 4-bbl was rated at about 230, that means that based on cylinder head design alone the LA basically lost about 30 horsepower.
What is the shape of a cylinder head?
The cylinder head has a scallop shape on the exhaust side, and the intake and exhaust ports are directly across from each other just like the HEMI. Also like the HEMI, the intake valves are on the intake side of the cylinder head, and the exhaust valves are on the exhaust side.
Can a Poly 318 block handle a 120 over?
A couple of built Poly 318's, both with the dual quad intake made of unobtanium. You can still get .090 over pistons, and the block can actually handle .120 over.
Is a Mopar 440 a heavy engine?
The Mopar 440 big block was just a few pounds heavier, so this 318 was quite a heavy engine considering. But it was efficient, if anything, and the design of the cylinder heads made it breathe better and it wasn’t so bad on the fuel mileage, either.
