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Original Message
Internally balanced 428
By Ross - 08/23/2001 7:07:47 AM; IP 12.75.103.101
Shoe's right, but I'd like to word it a little differently. I wouldnt consider the early ones "front half" internally balanced although thats how it works out.

The early 428's and 410s made up the weight they needed for external balance at the flywheel and used a standard balancer up front. Th amount it needed wasnt as much as later SCJ's

SCJ's with the caprscrew rods needed more weight than could reliably be made up at the back of the motor, rather than add weight to a neutral balanced dampner, they added weight to the spacer and the flywheel.

Variations of balance weight do exist, but I havent found any reliable data, bottom line, 428 / 410 with std rods are all pretty close, and then 1UA and capscrew rods use the "hatchet" up front

All were externally balanced though
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=7759&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7759" onclick="return false;">'66 390 Internal Vibration</a>&nbsp;-- <font color=#0000ff>Paladin, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7759', contentMargin: 60, icon: $('anchor7759') }); </script>  '66 390 Internal Vibration -- Paladin, 08/22/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7761&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7761" onclick="return false;">The wrong damper won't make it shake.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7761', contentMargin: 60, icon: $('anchor7761') }); </script>  The wrong damper won't make it shake. -- Dave Shoe, 08/22/2001
 RE: Dampner may not be the problem -- Mel Clark, 08/22/2001
 RE: '66 390 Internal Vibration -- BOB HOPKINS, 08/22/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7777&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7777" onclick="return false;">RE: '66 390 Internal Vibration</a>&nbsp;-- <font color=#0000ff>Ray, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7777', contentMargin: 60, icon: $('anchor7777') }); </script>  RE: '66 390 Internal Vibration -- Ray, 08/22/2001
Collapse <a href=../ForumFE/reply.aspx?ID=7781&Reply=7759><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor7781" onclick="return false;">RE: '66 390 Internal Vibration</a>&nbsp;-- <font color=#0000ff>Mel Clark, <i>08/22/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=7781', contentMargin: 60, icon: $('anchor7781') }); </script>  RE: '66 390 Internal Vibration -- Mel Clark, 08/22/2001
 Not exactly. -- Dave Shoe, 08/23/2001
Collapse <b>Internally balanced 428</b>&nbsp;-- <font color=#0000ff>Ross, <i>08/23/2001</i></font>Internally balanced 428 -- Ross, 08/23/2001
 RE: Internally balanced 428 Revisited -- Mel Clark, 08/24/2001
 What I'd do -- Ross, 08/23/2001
 First Thing I'd Check -- Skip C., 08/23/2001
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