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AMC Harmonic Vibration Damper Listing |
Post Reply | Page <1 789 |
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1969rebelsst
AMC Fan Joined: May/29/2019 Location: Indianapolis Status: Offline Points: 1 |
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So helpful, thanks guys!
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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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I thought the 70 390 had the 360 balance on it???
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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HannuV
AMC Apprentice Joined: Jun/19/2013 Location: Finland Status: Offline Points: 34 |
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I bought a vibration damper and crank pulley from a friend. He has a 74 Javelin with 360 engine on it. The damper came from that engine, but I don´t think the 360 really is the original engine.
The damper is three bolt type and also has 180 degree weight on it. There is casting number 3211454 on damper, this should be from 71´ 401 engine, or am I missing something here ? Could someone help me figure out, what I just bought ? Thank you
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HannuV
AMC Apprentice Joined: Jun/19/2013 Location: Finland Status: Offline Points: 34 |
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Here is a picture of the damper.
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5476 |
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I thought that I would post these pictures up based off of 3 bolt dampers and 4 bolt dampers to make it all a little more clear. Again, each damper was balanced individually to each engine. So if you are swapping a damper, the rotating assembly should be re-balanced. 3- Bolt Vibration Dampers. The '68-'69 390 damper is different than a '70 390 damper The '70 390 and the 3-bolt 360 damper is the same part but balanced differently. The 3-bolt 401 damper and the '68-'69 390 damper are the same but balanced differently. 4-Bolt Vibration Dampers. Easy to tell the difference because they are all different. If for some reason you wanted to replace a 3-bolt damper with a 4-bolt damper, just make sure the weight is the same and of course, have it balanced. In other words, A 4-bolt 401 damper could be used on a '68-'69 390 if re-balanced. A 4-bolt 360 damper could be used on a '70 390 if re-balanced. Not sure if a 4-bolt 304 damper could be used on a 290/343 or not - I will find out some day. Edited by SC397 - Jul/02/2020 at 6:41pm |
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MoGas
AMC Fan Joined: Nov/20/2020 Location: Katy TX Status: Offline Points: 1 |
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Do you know if this has been addressed? I am getting ready to assemble a 360 with an early cover and 80101 balancer. Do I need to go get a new cover? Do I still need to perform the other modification mentioned? Thank you,
Dave |
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klvn8r
AMC Apprentice Joined: Feb/26/2012 Location: Texas Status: Offline Points: 160 |
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Hey Rick, Could you describe how the 71 401 damper is different from the 68-69 390 damper? I'm working on a 72 401 (very early??) that has a 3 bolt damper....but am considering using a four bolt version from another 401. Thoughts?? klvn8r |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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For reference, DAMPENERS from AMC 67-72, AMC 73-78, & 1974-76 Jeep Parts Manuals:
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5476 |
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hacksaw1971
Supporter of TheAMCForum Joined: Feb/11/2020 Location: hopewell Status: Offline Points: 1398 |
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im using the 390 wheel (from a member) and a damper (from A P D) on my S/C. the shop will fine tune then when thay balence the spinny stuff. . the last time i swapped a damper on a flat crank 360 it was on the car. it worked fine. (again from A P D) in my case if it shook i never felt it. but yes ya should have it done if ya can. everything i said here was just what i did and it worked out well.. it mite act differnt for you if someone has been inside the mill your working with. i have been very happy with these folks, she will even pick up the phone and knows what she it talking about....
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its the little things that make the biggest difference
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Post Reply | Page <1 789 |
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