Re: Another magnum motor question
[Re: Andrewh]
#1182114
02/19/12 03:41 PM
02/19/12 03:41 PM
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Joined: Feb 2009
Posts: 773 Crofton, Ky.
rattler
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super stock
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OP
super stock
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Posts: 773
Crofton, Ky.
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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)
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Re: Another magnum motor question
[Re: rattler]
#1182117
02/19/12 04:53 PM
02/19/12 04:53 PM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
top fuel
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top fuel
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Kentucky
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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
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Re: Another magnum motor question
[Re: dfsmopars]
#1182118
02/19/12 05:44 PM
02/19/12 05:44 PM
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Joined: Feb 2009
Posts: 773 Crofton, Ky.
rattler
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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)
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Re: Another magnum motor question
[Re: BulletBob]
#1182122
02/19/12 09:09 PM
02/19/12 09:09 PM
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Joined: Feb 2009
Posts: 773 Crofton, Ky.
rattler
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What year balancer would i need Bob?
1957 Dodge truck, Snakeskin Green with a little stroker motor. 1964 Plymouth Savoy wagon ( my new project)
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Re: Another magnum motor question
[Re: Andrewh]
#1182126
02/19/12 10:24 PM
02/19/12 10:24 PM
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Joined: Feb 2009
Posts: 773 Crofton, Ky.
rattler
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super stock
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super stock
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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)
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Re: Another magnum motor question
[Re: rattler]
#1182127
02/19/12 10:40 PM
02/19/12 10:40 PM
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Joined: Jul 2003
Posts: 6,167 Maryland
GO_Fish
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master
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Maryland
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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
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Re: Another magnum motor question
[Re: BulletBob]
#1182129
02/19/12 11:12 PM
02/19/12 11:12 PM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
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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
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Re: Another magnum motor question
[Re: dfsmopars]
#1182130
02/20/12 01:20 AM
02/20/12 01:20 AM
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Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,478
Kalispell Mt.
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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!
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Re: Another magnum motor question
[Re: HotRodDave]
#1182131
02/20/12 08:08 AM
02/20/12 08:08 AM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
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top fuel
Joined: Aug 2007
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Kentucky
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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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