Magnum vs. LA. Side By Side Comparison
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- Опубликовано: 23 сен 2021
- The Magnum was Chrysler's final evolution of the true inline wedge engine. Here is a quick rundown of the differences and similarities between the 273 through 360 LA and the 5.2/5.9 Magnum engines.
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No pretentiousness, no clean hands, no looking down on the young guys. Just grit, knowledge and telling it the way it is and making sure that its accessible to everyone. Respect Tony.
Bahahahahaha
Just grit, and shear fucking "know it all" complex. This dudes a tool
@@nimwit0 having been called a "know it all" in the past I can safely there's a difference between actually knowing a specific topic and being a "know it all." UTG supports his arguments, you, on the other hand, do not. Failure to support one's arguments is a good sign of a "know it all."
Yes, UTG kinda pulls a bait and switch with a GM LS vs a Chrysler LA but he's actually showing the interchangeability between a Dodge Magnum and a Chrysler LA to make a better air pump as close as possible to a GM LS.
That you missed this point shows who the "know it all" actually is.
Don't come at me. I'm a Ford fan boy who's honest enough to admit Ford tends to miss the point about an engine being a glorified air pump first and a torque and/or horse power generator second, (yes torque and HP are a byproduct of moving as much air as possible from intake to exhaust with as little resistance as possible).
@@piwright42 🤣😂
No one looks down on younger guys. Younger guys initiate it by being cocky and stupid.
How does that old saying go? Your cook shouldn't be thin, your fishing guide should know the differences between fresh and salt water and if your mechanic is spotless by the end of the day...double check his work.
When Uncle Tony says F those cracks they don't matter, I believe him
I think that's also the case for the 5.7 Chevy Vortec heads, but machine shops don't want to use cracked heads
I have 4 magnum head from 318s one engine had cracks in every cylinder. The other engine had 2 cracks per head. Don't think it would make a difference as I didn't notice them un until I lapped the the valves and seats. They are very minor looking cracks.
They don't. This has been know for years
Well yeah might be a chance the crack could cause a check engine light to come on but since most of us are doing carbs definitely less of a problem.
Awesome man I've been waiting on a magnum video
Gotta appreciate how this was uploaded at 3:18
Thank you Tony, I know I have been bugging you for almost a year to do a side by side comparrison of an LA and Magnum.
It took me about 3 months of research to figure out the differences,
You reach alot more people, and have so much knowledge, that I am positive you have just helped a few hundred people out with this comparison!
Again thank you!
👍😁
Well, if he was all that knowledgeable, then he'd be hot rodding FORDS, not Mopars or GM's! 😁
@@HighlanderNorth1 ew.
@@HighlanderNorth1 he's knowledgeable enough to know not to waste his time with Fords 😂
@@HighlanderNorth1😅😂 Yeah, everyone in the hotrod market wants to mess with 4 cams. Reality is that when it comes to rebuilding your own engines Ford is the WORST of the 3 since they went to 4 cams, twin turbos, etc
Great explanation uncle Tony. Actually, better than great! I am always amazed at your memory and the knowledge you have retained. A walking Mopar encyclopedia! Thanks for the video.
I wish I new as much as he’s forgotten lol
5.9 Magnums make awesome power for cheap! Mine just pushed my 68 Satellite daily driver to 8.61 in the eighth with a little 600 CFM gas mileage carb, a 904 automatic with the stock converter and 3.55 gears! The only non stock stuff inside my engine is a Hughes cam and valve spring kit and a Cloyes timing set. My friends 56 Chevy with a 350, 4 speed and 5.13 gear runs high 8's/low 9's and a 650 horsepower 7 speed supercharged 2018 Z06 Corvette usually runs around 8.20 so I'm in the same ballpark as a lot of badass cars with a very mild and streetable combo.
NICE!! 👍🏻👍🏻
@@77yogurt Thanks!
@@kennywhiddon1497 Yes roughly according to the conversion chart. It says some cars may be quicker or slower though so it could likely be anywhere from 13.20 to 13.60
AND YOU CAN DO IT WITH JUNKYARD PARTS,thats the amazing ability of a magnum engine,just remember the magnum engines and the new hemi's, the valve springs are junk right out of the box,208 wide open pressure on a valve spring is a joke,need 125 to 135 on the seat and 280 to 335 for serious revs,the magnum 360's are available all the time for less that 300 for a complete core,904's can now be built to hold the power with space age materials[KEVLAR,KOLENE STEELS RED LINED CLUTCHES,AND STRONGER SPRAGS AND BANDS,STAB IT AND STEER--------------TIMING CHAINS CHECK THEM EVERY 65-85 K MILES,mopar timing components are junk after 65 thousand hard miles,good thing they're cheap
1/8 mile sucks, I won't even watch 1/8 mile.
360 are some of the greatest sounding V8's ever created.
I've got a magnum 5.2 I've been thinking about upgrading. We need more input from the pros like you on what our options are.. you know, mild upgrades on up to major mods.. I really think that would be an awesome series that so many of us would appreciate! Either way, I love your channel, keep up the awesome content!
I'm not a pro by any means but I've done a couple Magnum builds and I'm currently doing a stroked 360 LA for my drag car. My first step to upgrading the magnums has always been a bigger cam, new lifters and pushrods, and headers. This will at least get you the sound and attitude of a somewhat "built" V8. Next would be an inspection of the heads, magnum heads are nutorious for cracking and as a general rule of thumb it's always good to take them off and inspect them. If there's no cracks great! Now you just need to decide if you want to clean up the original heads or go with a new set. Me personally I'd go with a set of aluminum heads that have the ability to bolt on an LA style intake because there's so many more options for an LA as far as intakes go. But this gives you the option to swap a 4bbl carb on it, you could also use the original throttle body with a 4bbl to 2bbl adaptor or go all out and do a modern efi system. All depends on cost and what you'll use the engine for and your goals for it. And last but not least you have your bottom end, the factory bottom ends aren't bad in these engines at all, but if you're looking to raise your compression ratio, add more cubes or plan on using a power adder, a new rotating assembly would be in your best intrest. Hope this helps some! Goodluck with the build!
Richard Holdener is doing a series on the 360 right now, I know it's not a 318 but most of what he says and does to make power will still apply to it, the power gains may just be a little lesser on the smaller engine
My favorite was ditching the giant stock starter on my 69 Dart for one of the tiny modern magnum starters.
I miss the sound of the old starter.
its loud because of gear drive.@@danw6014
@@danw6014 Sounds like a horse dying but man if it ain't unique
I’m in Western Australia, I’m a Cleveland guy but I love UT knowledge and look forward to every episode.
Great stuff UT.
Keep it up. 👍🏽👍🏽
The Cleveland is hands down the king of small blocks. And I’m a die hard mopar guy.
At first, I didn't like Clevelands because they were odd Ford engines. But recently, I've been appreciating them more.
Cleveland was designed by a Team of Buick engineers
I subscribed right after the part where you said to not worry about the cracked heads.
You just made my day and you’re right it ran fine as is.
I've been running a LA roller cam long block using the 1986 2bbl factory fuel system & external electric fuel pump. Been daily driving/utility usage and does a great great job still.
Great information again Tony! makes me wish I was still in the hot-rod, race engine shops. As a machinist I loved to hone cylinders and line hone engine blocks just as close I could! I'm old now, retired but I still would love to do it all over again...
Hi Tony! In 1978 I took the head off a 318 in a 69 dodge polara and left the intake and exhaust manifolds on to change the head gasket and it worked. I was 17 and dumb, desperate ,and wild to get on the road I guess. That's my story and sticking to it.
This reminds me of the great magazine articles I used to read over and over again... Tony you're a legend. Thank you for being our guide. 🙂
They also made "fast burn" heads for LA motors. The valves were small, but that can be changed. The set I put on my 318 woke that little mill up quite nicely.
Excellent video. On the LA heads, if you strip an intake bolt you can use a longer bolt and with the valve cover off you can put a nut on the longer bolt that will extend into the rocker area of head. I had to do it before.
I will probably never put an engine together but listening to this info is interesting. Good job as always Tony!
I am not a mopar fanatic. But this was a very needed video. Your chrysler engine knowledge is impressive.
I am glad I watched this.
Thank you!
Duuuuuude. This is an AMAZING video. This is info I have been trying to compile in one place for years. THANK YOU!
Very good and very thorough video --- one thing you forgot to mention: if you're going to use stock rocker arms the LA rocker arms are 1.5 ratio and stock Magnum rocker arms are 1.6 ratio which would likely be a consideration when selecting a camshaft
Junkyard magnum heads are ok if you're on a tight budget. I went with EQ Magnum heads for my kids 360. Stock valve sizes, spring upgrade, some bowl work and gasket matching. Topped it off with a home ported Performer RPM intake being fed by a Performer carb (AFB clone). Last year he put it on a chassis dyno and it made 365 HP and 415 torque at the wheels. I'm a firm believer in the Magnum style head. BTW you can purchase EQ heads with the old LA style intake manifold bolt pattern.
Thanks Tony. I hope that ends a lot of confusion people have had about the difference between the LA and Magnum blocks.
So close but so different.
Like a 170 and a 225.
It's a lot like the differences between the 86 and earlier SBC and the 87 and later SBC. Fairly minor things for the most part.
Between your channel and Nick’s Garage, I can stay entertained for hours. Thanks for your approach to these videos; it shows your heart.
I can’t put into words how helpful this video was for me I just got a junkyard 5.9 magnum to build for my 1990 Dakota that I just put a custom built frame under that I plan on running some hard tire no prep drag racing with and a little street cruising. I have a fully forged and balanced scat stroker kit on the way for it and I gotta get it stripped down to the block this weekend to send to the machine shop to get bore .030 over, then I ordered a set of trick flow aluminum heads for it and a trick flow intake manifold. Now I plan on running it carbureted because the simplicity of it. Then I plan on running nitrous on it at the track but I don’t know how big of a shot yet because I’ve personally never dealt with nitrous but I have a couple buddy’s that have used nitrous since they first started drag racing and once the engine is in the truck and running they will help me with that decision.
My 1970 340 heads have 2.02 intake1.60 exhaust factory installed. The head looks like a ordinary early 360 head casting, but no air injector passages. The valve pockets under the seat right down to the bowl were shaped with a throat cutter at the factory. I never fully ported these heads, only gasket matched and blended. The hyd flat cam has about .550 lift and really works good with the near stock heads. I built the motor when I was a teen in the mid 80s, it's had cam, intake, exhaust changes since then, that's all. It is a great engine, 318 and 360 LA motors also are such tough motors!
My brother had a 1970 340 Dart Swinger 340. I had/have a 71 Demon 340. We bought them new in 70 and 71. They both had the newer 360 casting with 2.02 intakes and 1.60 exhaust. I even had Dodge pull one head on my car to prove it was the right head! They finally convinced me as I was there when they tore down my engine. Funny thing was the dealer mechanics didn't even know they started using that casting in 1970.LOL! I went on to race my cars in Super Stock and did quite well including setting my class record.
I have an 87 2wd Ramcharger that I transplanted the 5.2 in. I have the Edelbrock RPM intake with a Street Demon on top. I used the Magnum front drive. Everything fits good. Bolted to the 904 with one TQ hole slightly elongated. The motor had 200,000 miles on it. When I pulled the heads, all looked good, so I bolted it up! No other changes, really. Runs really good. I used a small-cap HEI distro and remote coil from Assault racing for spark.
Thanks, Uncle Tony!
Years ago one of the car magazines ordered a Mopar performance 360 that had a rather hot cam.
They stuffed it in a four door valiant they nicknamed, "the brick". With headers, huge carb, hot ignition and four speed trans, they were running it on a track with lots of curves and one fairly long straightaway and they were keeping up with BMW's and vettes. But they did a major job on the brakes and suspension. Can't remember what all they did but the brakes were huge ones from what would go on a cop car.
If I remember correctly that crate 360 cube engine was rated at 380 HP and 390 torque. But the torque came on strong at low rpm and carried all the way to 6000 before dropping off.
It would be a blast to build a 360 magnum to those specs, and stuff it in a Dodge Dart or Valiant and go street racing.
Thinking back long and hard, I believe it was a Mopar Performance magazine article.
Had to laugh at, "the brick". Comparing it to sleek, streamlined Vettes and BMWs it really was shaped like a brick. LOL
I bet it thoroughly pissed off some guys to have that "brick" keep up with them.
Love the knowledge in these videos just got my 360 magnum back from the machine shop to put in my 99 ram 1500
I put a 95 360 in my 78 truck. Has stock Chrysler ignition, M1 intake, and edelbrock on top. Kept the 46rh that was attached to the magnum but wired the od and lockup to two switches. Took the 9.25 rear and had to weld new spring perches because the 78 is a bit more narrow.
Thank you Sir for running this, it answers a lot of questions for me. For my 80 D150 I built an 88 360 roller engine . I had already rebuilt the 80 heads and tried to use them on the 88. The pushrods dragged on the openings where they pass through going into the block. Fortunately I was able to sell these heads for a decent price right away and got busy and cut the seats and valve faces on the 88 roller heads.
I've always wondered at the lack of love for the Magnum, I always placed it between the Vortec 5.0/5.7 and the LT1/L99 in evolutionary terms, I think the stock Magnum intake is a few steps ahead of the Vortec weirdness.
Yeah, and there are tons and tons and tons of them in the wrecking yards. So much power making potential there tossed away.
When ever I make it to meet you I will bring my early unmarked W2 heads for you do a video on them.
Tease
Thank you uncle Tony! As a new guy to Mopar I have wondered about the difference between the LA360 in my Cordoba versus the Magnum. Now I know. 😁
Thanks for this video, I have done magnum heads on an LA engine before, but this explained so many more differences.
Great info Uncle Tony! Glad you are paying some attention to the Magnum engines. Looking forward to more info on them. Very interesting that Chrysler reached back and used the AMC V8 rocker design for the Magnum.
I happen to be rebuilding a 5.9 mag for a friend so this is some great stuff to know thx Tony
Thank you! You taught me quite a few things I didn’t know about my 5.2 magnum.
I pulled a Magnum out of a 1995 Ram and when I took the heads off the block, it had the oil holes from the factory, as I was looking to run my 2.02 J heads on it.
Thank for the wisdom Tony! I have a 5.9 LA360 out of a 79' B300 Cargo van and planning on rebuilding it over the next couple of years or so... I've recently been running into more and more videos relating to the 360... It's motivating having more information to refer to!
I needed this video! I have a Magnum 360 with LA heads that came in a project. Now I know where to check to see if the oil passage was drilled out. Thanks UTG!
early early magnums had them drilled already. rare af though.
Seriously a solid teacher on this topic. none of the condescending talk and all the knowledge
Glad I ran into this video and channel. Very informative. I have a 94 Jeep ZJ with the 5,2 and am going to be making a junkyard run soon and was thinking about some heads to freshen up. I know now not to worry about those minor cracks when I do a light port and cleanup on them.
This is the video I've been WAITING for! Finally! Thank you!
We had one Magnum valve seat crack spread out across the chamber into water and start eating coolant at an impressive rate. It was bolted to a roller cam 360 block for a couple years. That's a grand total of one, out of maybe a dozen sets of Magnum heads I've had or worked with, maybe 70% of which had cracks. But it is definitely at least possible.
A few things you left out on the Mag blocks. The early 5.2 from 92 thru about 95 and the 93-95ish 5.9 still have the LA oiling drilled into the blocks and can be used if you use a cam with the 2 -4 oil hole in the cam. If your Mag block doesn't have the oiling hole you can use the Oil thru pushrod shaft mount rockers that are sold by a lot of companies now like Comp, Prw, Speedmaster, and Harland sharp when you run LA heads on a Mag.
Had tomstop this twice. I learned so much my head hurt. I will re watch tis often.
Tony, you rock. Some of the stuff I knew, a lot of it I didn’t. Awesome content as always!
273 v8 65-69 In Australia in our Valiants had a solid lifter, the whole assemblys are sought after rocker gear etc.
same in america. biiig money.
Love your videos! Always loaded with info..had a highly worked 5.7 hemi that was a monster! No LS infatuation here
I've been wondering about this for many years. Thanks!
Great class on my Mopar LA vs. Magnum heads! Thank you sir for posting this video here where we can all watch it.,
You're awesome. Seriously. That was the best time wasted. Learned a tonne, and wasn't bored. Straight forward and informative. I cant wait to watch some more videos and learn some more. Maybe one day i'll actually build something when I win the lottery and you will be the reason it works! Cheers mate!
Thank you for the great content .It's nice to see.I liked how you explained all the important details .keep up the good work.
Props to you Tony. Love your no nonsense, no bullshit videos. Long live those Chrysler engines!
Thanks Tony for another entertaining and informative video.
Love your honesty, UT. Good work as usual.
Tony, super useful video, about to run Magnum heads on an LA 318, watching this video helps confirm the modifications that need to be made. Thanks for imparting tons of great knowledge off the cuff!
Good information thanks for sharing
Thank You Professor. Another great classroom lecture. I learned alot. 2 thumbs up!👍
nobody tells it like uncle Tony he is such a GEM EVERYBODY THANKS YOU
Just put a 360 Magnum in my Fifth Avenue. Been a Mopar fanatic all my life 💪🏾
Wow I bet your 5th Ave scoots!
great video - cant beat seeing the bits & differences in the metal!
Always Love the content UTG puts out! This guy has more MOPAR knowledge in his pinky toe than most guys with a brain. Again, good shit Unc!
TONY! You missed, early TBI magnum blocks (or as you called (LA Roller) are drilled to oil the rockers. These are the blocks to have.
Also 5.2 magnum oil pan same as 5.9. 360 style.
And the cam snout.
Great Video!
@Daniel G
I would know how to answer if I know the comment.
You make no sense.
Thanks Uncle Tony.....great tech breakdown man. G'DAY from South Australia😆👍
Great rundown, thanks for bringing this to us
I have a 71 318 la block with the 80s heads, stock cam from 1969, cast crank and a 4 barrel intake with an edelbrock 600cfm carb, thing starts better than a new car
Great episode! I have an LA 318 original motor in my ‘73. I always wondered about a Magnum comparatively.
This is the video I've been waiting over a year for. I'm building a 5.9 Magnum to install in my '85 W150. Picked up a decent virgin core but the heads had those very cracks. Nobody could tell me definitively whether the cracks were benign or death sentences and I was about to pay for a pressure test. Not intere$ted in aftermarket heads for my truck if I don't need them and I was suspicious that the cracks were N.B.D. Uncle Tony says "Run 'em" and that's good enough for me. Also, I went with KB107 slugs (0.020" over) which should get me closer to zero deck than the stock ones that were 0.050"+ down. Just got it back from balancing. Now to drill the heads for my Performer spread bore and Thermoquad. Using OEM single pickup distributor and stock LA ignition. Just a work truck that covers a lot of highway so no idea what cam I'll use yet?
I don't have either of these motors and enjoyed every second of this video
Wow, Tony, that was a real tour de force. Very well done!
Great Video Tony!!! This is very useful for the classic vehicle people...
Thanks Tony, I have a 318 magnum and wanted to use the heads on a 73 318.. now I know what I need to do to use them
must be the 1st time i heard anyone say I WANT YOUR CRACKED HEADS. lol
Thank you. Filled in a lot of gaps for me. I seem to remember smaller intake valves and ports on 273 and 318 (68 to 73?). Volume on my lap top is poor....could have missed it.
Awesome Info!!!! gotta luv uncle Tony to break it down!
Thanks uncle Tony. You tought me more than what I was wanting to know. I appreciate it.💪👍
Ive got the best of both worlds sitting in storage. A late 92-93 360. "308" heads, with a factory roller cam, including the lifter retention "spyder". Mine also has a factory windage tray. Another sweet piece is the timing chain cover, which eliminates the mount for the mechanical fuel pump. Nice if you are running an electric pump only
I've had multiple Magnums go well over 300,000 miles in Ram wagons,and were still running when sold. Never even needed a starter. Fantastic motors. Transmission and fuel pump not so much.
Im working on some magnum heads right now. Doing some cleaning up work and valve relief no porting or polishing just smoothing things over. 1st head i done no cracks, 2nd head, watch this video took the 2nd head apart and BAM! flipping crack. Im trusting that your right that the crack doesnt affect the valve. Other wise ill have to tear down some other engines for the head off them.
I read in some magazine probably over 2 decades ago the Magnum heads crack and it absolutely is a non issue. Gotta give credit to the effective and efficient Magnum head design to AMC. Its what AMC had and Dodge bought them and their tech. When the Dakota came with the all new 318 "Magnum" rated at 220 hp in 1992 many were taken back how quick the new 318 was. It ran the 1/4 quicker than the on paper rating would suggest. The 454 SS Chevy muscle truck was easily dusted off by the Dakota and its improved 318.
Had a 92 Dakota Sport with a 318 in it it was an amazing engine.
Great Informative video Uncle Tony!👍👍 Hello Ultra Kathy, great camera work!👍👍
I've been waiting for Uncle Tony to educated us on the Magnums forever that's cool the Magnum head is basically the same thing as the Chevy Vortec head
Honestly I will be humble and modest when I say even as a hard-core mopar guy, the LS engines are the ultimate V8 engines. The power and reliability of all of them has just amazed me. I mean really even the old LA and magnums can't compete without putting more money into it then you would an ls for sub par performance
I pulled a 360 out of a '91 "Boys & Girls Club" van they junked with 62k miles. The '89-'92 318/360's seem to be a mix of the LA & Magnum.
edelbroc air gap for the magnum is very nice manifold big ports.
I have seen one of those cracks blow out into the water jackets but it was on a truck that was SEVERELY overheated
Another valuable lesson Tony, keep em coming mate 🇦🇺
i appreciate this information
i love these engines my dad has a 94 dakota with 318 330k
Great to see this. I'm think I'll need to build a Magnum for my Jeep project so I can keep the Ax15 I invested in.
I have a nostalgia for the LA engine. I've had both LA and Magnum, there don't seem to be enough advantage in stock form to quib over. I like the old style rocker shafts, the look of the LA is just what I remember best and have most experience with. If I have an LA 318, it can make the power levels I am after, if I want over 400 HP, I'll just go with a 383, or a 440, so a good video here, very good information.
Great video. Couldn’t turn it off. Thanks for sharing.
Nice job unk
Great info👍👍
Great video uncle Tony! How does all that knowledge fit in your head? Lol. All seriousness great job.
Great info love you're videos keep them coming 😊
This is what the internet was made for. Trying to figure all this out alone would be a headache
Great explanation of the differences!
i'm excited to see a video like this, i just got back into owning a mopar(i grew up in a mopar family) 5.9L magnum Durango r/t. please more magnum 5.9L videos!