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Another magnum motor question #1182112 02/19/12 01:16 PM 02/19/12 01:16 PM
Joined: Feb 2009 Posts: 773 Crofton, Ky. R rattler OP super stock
rattler OP super stock R Joined: Feb 2009 Posts: 773 Crofton, Ky.	I picked up a 5.9 magnum motor for the wife's Dart project. I know that i will have to change pans and pickups, but i was also wanting to put the original stle(72) pulleys and acceceries on. Can i just use the older sylye timing cover and water pump? The old drive brackets? And what do i do about the harmaonic balancer? Can you use the LA stlyle balancer and pulley off of a 360? 1957 Dodge truck, Snakeskin Green with a little stroker motor. 1964 Plymouth Savoy wagon ( my new project)

Re: Another magnum motor question [Re: rattler] #1182113 02/19/12 01:35 PM 02/19/12 01:35 PM
Joined: Feb 2003 Posts: 8,680 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,680	the whole front end does bolt up, pulley's and all, BUT the harmonic is different. I don't think you can reuse the LA stlye. you will have 1 bolt that doesn't line up on the crank pulley.

Re: Another magnum motor question [Re: Andrewh] #1182114 02/19/12 03:41 PM 02/19/12 03:41 PM
Joined: Feb 2009 Posts: 773 Crofton, Ky. R rattler OP super stock
rattler OP super stock R Joined: Feb 2009 Posts: 773 Crofton, Ky.	The serpentine pulley appears to be part of the harmanic balancer, that is why i thought that i might be able to use a regular LA style harmonic ballancer-pulley setup. 1957 Dodge truck, Snakeskin Green with a little stroker motor. 1964 Plymouth Savoy wagon ( my new project)

Re: Another magnum motor question [Re: rattler] #1182115 02/19/12 04:45 PM 02/19/12 04:45 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	To use your stock stuff you need a cam snout extension from Hughes. as far as the crank pulley Get you a balancer from a earlier MAG 5.9 & put it on & bolt your pulleys up 1 hole can be burred out to fit the sixth bolt. To use your stock Alt brackets you will need to grind a boss on the head down or move the tab on the bracket

Re: Another magnum motor question [Re: BulletBob] #1182116 02/19/12 04:47 PM 02/19/12 04:47 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	Which intake are you using?

Re: Another magnum motor question [Re: rattler] #1182117 02/19/12 04:53 PM 02/19/12 04:53 PM
Joined: Aug 2007 Posts: 2,356 Kentucky D dfsmopars top fuel
dfsmopars top fuel D Joined: Aug 2007 Posts: 2,356 Kentucky	I stuck the entire LA front end on the 5.9 I built for my Charger. I used the 318 timing chain cover, LA water pump, damper and all the accessories. I eliminated the mechanical fuel pump and am going with an electric one. I have not started it yet but so far everything looks good to go. I hope to fire it up in the next two weeks. ‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500

Re: Another magnum motor question [Re: dfsmopars] #1182118 02/19/12 05:44 PM 02/19/12 05:44 PM
Joined: Feb 2009 Posts: 773 Crofton, Ky. R rattler OP super stock
rattler OP super stock R Joined: Feb 2009 Posts: 773 Crofton, Ky.	I haven't decided which intake carb combo to run yet. This will be a mild set-up for the wife. But, back to one of my questions, can i use an early LA 360 balancer? 1957 Dodge truck, Snakeskin Green with a little stroker motor. 1964 Plymouth Savoy wagon ( my new project)

Re: Another magnum motor question [Re: rattler] #1182119 02/19/12 08:30 PM 02/19/12 08:30 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Maybe someone else can confirm, but I think the magnum and LA 360's are balanced differently, which is why you can't use an LA balancer.

Re: Another magnum motor question [Re: DaytonaTurbo] #1182120 02/19/12 08:51 PM 02/19/12 08:51 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	They do balance different that's why I posted about using A earlier 5.9 Mag balancer

Re: Another magnum motor question [Re: BulletBob] #1182121 02/19/12 08:56 PM 02/19/12 08:56 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	If you go back with the V belt drive that came with the car You will need the Crosswinds intake or the Dual plane from MP for a Mag. This way you can use factory off the shelf bypass hose & such. I've done this swap a few times

Re: Another magnum motor question [Re: BulletBob] #1182122 02/19/12 09:09 PM 02/19/12 09:09 PM
Joined: Feb 2009 Posts: 773 Crofton, Ky. R rattler OP super stock
rattler OP super stock R Joined: Feb 2009 Posts: 773 Crofton, Ky.	What year balancer would i need Bob? 1957 Dodge truck, Snakeskin Green with a little stroker motor. 1964 Plymouth Savoy wagon ( my new project)

Re: Another magnum motor question [Re: rattler] #1182123 02/19/12 09:17 PM 02/19/12 09:17 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	94-mid 99 I had to change the balancer on my 2000 R/T Dak to use a true underdrive pulley kit.. if there's any problems or questions I can help you. I've done the LA to Mag swap in different cars & trucks about 8 times or so in the last 5 years. 518 swaps too.

Re: Another magnum motor question [Re: BulletBob] #1182124 02/19/12 09:57 PM 02/19/12 09:57 PM
Joined: Feb 2003 Posts: 8,680 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,680	97 I thought was the cut off year. they change in 98, but could be just electrical.

Re: Another magnum motor question [Re: Andrewh] #1182125 02/19/12 10:21 PM 02/19/12 10:21 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	The electrical changed every time the 518 had changes it looks like to me. Some trans shops will put a 2 pin or 3 pin valvebody in a 46RE.

Re: Another magnum motor question [Re: Andrewh] #1182126 02/19/12 10:24 PM 02/19/12 10:24 PM
Joined: Feb 2009 Posts: 773 Crofton, Ky. R rattler OP super stock
rattler OP super stock R Joined: Feb 2009 Posts: 773 Crofton, Ky.	I was looking at online parts sources and it listed 94 thru 03 as one part, and 93 back to 79 as being another balancer. I am just trying to round up the right parts before i need them. 1957 Dodge truck, Snakeskin Green with a little stroker motor. 1964 Plymouth Savoy wagon ( my new project)

Re: Another magnum motor question [Re: rattler] #1182127 02/19/12 10:40 PM 02/19/12 10:40 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	That's correct 93 and back LA 360's used a different balancer (IIRC) than 94+ 5.9 Magnums. That is because the Magnum used a different crank, with lighter rods and pistons than the old 360 LA did. I'd be concerned that bad things will happen if you try and mix/match them. Are you sure the serpentine pulley won't come off of the Magnum balancer? I'm having a hard time visualizing that the pulley and balancer are one part... (balancer is iron and the pulley, stamped steel)? Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

Re: Another magnum motor question [Re: GO_Fish] #1182128 02/19/12 10:48 PM 02/19/12 10:48 PM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	If I remember correct the reason that I changed the balancer on my Dak because the pulley & balancer was two piece pressed together. I know I changed the WP to a bolt on pulley style (92-96) so the pulleys would work Find the balancer & put it on & ride.

Re: Another magnum motor question [Re: BulletBob] #1182129 02/19/12 11:12 PM 02/19/12 11:12 PM
Joined: Aug 2007 Posts: 2,356 Kentucky D dfsmopars top fuel
dfsmopars top fuel D Joined: Aug 2007 Posts: 2,356 Kentucky	Quote: To use your stock stuff you need a cam snout extension from Hughes. as far as the crank pulley Get you a balancer from a earlier MAG 5.9 & put it on & bolt your pulleys up 1 hole can be burred out to fit the sixth bolt. To use your stock Alt brackets you will need to grind a boss on the head down or move the tab on the bracket Alright, let me get this straight. With a '94 block, stock crank, KB pistons and an externally balanced flex plate from a Magnum, the LA damper from a '72 318 will not be good? What will happen? Is there a catastrphic imbalance or an annoying vibration? Is it something I can break-in the engine with and change later if I recognize a problem? I have everything put together and you have my gotten my attention. ‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500

Re: Another magnum motor question [Re: dfsmopars] #1182130 02/20/12 01:20 AM 02/20/12 01:20 AM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	You are asking for trouble, that thing is gonna be way out of balance. One...the KB pistons are lighter than stock. Two the magnum and LA are balanced different on the front and back of the eninge. When I was 19 I built a 360 once without balancing it and used the KB 107 piston, 360 rods, 360 crank and at first used 360 balancer and converter weight, vibrated real bad and ate HP. I got told to balance it, instead I looked up the weights and figured it would be closer to a 5.9 balance factor, put in a neutral converter a 5.9 plate and damper and it was better but still bad, finnally pulled it all, balanced it properly and no other changes it felt smooth as glass and felt like another 50 HP, so now any engine I build that is not all stock gets balanced, even stock rebuilds I try to swap pistons around so the heavy ones counteract heavy ones and light ones counteract light ones and same with rods. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Another magnum motor question [Re: HotRodDave] #1182131 02/20/12 08:08 AM 02/20/12 08:08 AM
Joined: Aug 2007 Posts: 2,356 Kentucky D dfsmopars top fuel
dfsmopars top fuel D Joined: Aug 2007 Posts: 2,356 Kentucky	Quote: You are asking for trouble, that thing is gonna be way out of balance. One...the KB pistons are lighter than stock. Two the magnum and LA are balanced different on the front and back of the eninge. When I was 19 I built a 360 once without balancing it and used the KB 107 piston, 360 rods, 360 crank and at first used 360 balancer and converter weight, vibrated real bad and ate HP. I got told to balance it, instead I looked up the weights and figured it would be closer to a 5.9 balance factor, put in a neutral converter a 5.9 plate and damper and it was better but still bad, finnally pulled it all, balanced it properly and no other changes it felt smooth as glass and felt like another 50 HP, so now any engine I build that is not all stock gets balanced, even stock rebuilds I try to swap pistons around so the heavy ones counteract heavy ones and light ones counteract light ones and same with rods. Rattler, I did not mean to derail your post. I hope you got the answer you were looking for. Apparently you ask the right questions ahead of your project unlike me. I did personally balance my rod and piston assemblies but it looks like I need to go shopping for a balancer. Thanks Dave. ‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500

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