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New 390 vibrates
By Gary - 04/15/2006 1:10:52 PM; IP 24.66.94.141
Just fired up my fresh rebuilt 390 and I have an engine vibration, increases with RPM. The engine rebuilder said he put in a 428 crank and I used my 390 flywheel and harmonic balancer. After reading up on old posts regarding internal / external balancing, I'm concerned about the combination I have but would like to check without pulling the engine. Is there a way to find out what crank I have? Can I pull the tranny (I don't want to) and put on a 428 flywheel without balancing the crank and flywheel together? HELP!

Just about finished......
69 Mustang
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Collapse <b>New 390 vibrates</b>&nbsp;-- <font color=#0000ff>Gary, <i>04/15/2006</i></font>New 390 vibrates -- Gary, 04/15/2006
Collapse <a href=../ForumFE/reply.aspx?ID=27195&Reply=27194><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor27195" onclick="return false;">RE: New 390 vibrates</a>&nbsp;-- <font color=#0000ff>giacamo, <i>04/15/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=27195', contentMargin: 60, icon: $('anchor27195') }); </script>  RE: New 390 vibrates -- giacamo, 04/15/2006
Collapse <a href=../ForumFE/reply.aspx?ID=27200&Reply=27194><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor27200" onclick="return false;">RE: New 390 vibrates</a>&nbsp;-- <font color=#0000ff>Gary, <i>04/16/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=27200', contentMargin: 60, icon: $('anchor27200') }); </script>  RE: New 390 vibrates -- Gary, 04/16/2006
 RE: New 390 vibrates -- giacamo, 04/16/2006
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