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Original Message

Engine balancing and ring reuse

By Bryan Z - 10/29/2002 10:28:29 PM; IP 205.188.208.168

Hi all. Since a rebuild on my 390 (appr 8000 miles) I have been experiencing a vibration which has been getting worse. When I put the engine together I did not have the rotating assembly balanced. Within the next couple weeks (before something gives way), I am going to tear the engine down and have the rotating assembly balanced along with the flywheel and pressure plate. My question is depending on what I find upon teardown and if the cylinder walls still display good crosshatch, would it be ok to reuse the same rings, keeping in mind they will be installed in their respective bores. I will also have the oil mods done and install ARP rod bolts. Here is a breakdown of whats in the engine now.
Block--C7ME bored .030 over
Pistons--cast 10:1
Heads--C6AE-R fresh with comp valve job thermactor hump removed
Intake--Edelbrock Performer
Cam--Edelbrock EDL-2106 194 deg @.050
Carb--Edelbrock 600 cfm
exhaust--stock logs and dual pipes through unknown
mufflers
Transmission--4 spd toploader
Pressure Plate--Ram 2600#
Rear--9" 3.50 trac-loc
The engine runs good other than the vibration. Before installing the fresh C6-R heads I could only get about
4300 rpm out of a set of C8-H heads. At the track last year my best time was a 15.4 @90 mph in a 65 galaxie conv. With the C6 heads I can get into the 5300
rpm range but havent had it to the track yet.
Does anything in my setup look mismatched or could it just be that something in the rotating assembly is a bit whacked. Thank You Bryan

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Collapse <b>Engine balancing and ring reuse</b> -- <font color=#0000ff>Bryan Z, <i>10/29/2002</i></font>

Engine balancing and ring reuse -- Bryan Z, 10/29/2002

Collapse <a href=../ForumFE/reply.aspx?ID=15038&Reply=15034><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor15038" onclick="return false;">You definetly have a problem.....</a> -- <font color=#0000ff>kevin, <i>10/30/2002</i></font><script type="text/javascript">
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You definetly have a problem..... -- kevin, 10/30/2002

Collapse <a href=../ForumFE/reply.aspx?ID=15043&Reply=15034><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor15043" onclick="return false;">RE: Just my 2 bits</a> -- <font color=#0000ff>Mark Ernst, <i>10/30/2002</i></font><script type="text/javascript">
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RE: Just my 2 bits -- Mark Ernst, 10/30/2002

Collapse <a href=../ForumFE/reply.aspx?ID=15054&Reply=15034><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor15054" onclick="return false;">Problem....</a> -- <font color=#0000ff>John, <i>10/30/2002</i></font><script type="text/javascript">
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Problem.... -- John, 10/30/2002

Collapse <a href=../ForumFE/reply.aspx?ID=15058&Reply=15034><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor15058" onclick="return false;">Try this</a> -- <font color=#0000ff>Travis Miller, <i>10/30/2002</i></font><script type="text/javascript">
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Try this -- Travis Miller, 10/30/2002

Collapse <a href=../ForumFE/reply.aspx?ID=15061&Reply=15034><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor15061" onclick="return false;">Engine vibration and ring reuse</a> -- <font color=#0000ff>Bryan Z, <i>10/30/2002</i></font><script type="text/javascript">
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Engine vibration and ring reuse -- Bryan Z, 10/30/2002

RE: Engine vibration and ring reuse -- rick, 11/06/2002