Forum Reply - JCO Consulting Services


Home	Free Stuff	Graphics	Programming Services	Contact Us	Ford Stuff

Original Message

RE: 390 Rod clearances

By John - 10/12/2002 10:55:17 PM; IP 142.177.9.53

Piston Pin Bushing ID:
0.9752-0.9755

Piston Pin Bushing Max out-of-round:
0.0004

Bearing Bore Dia:
2.5907-2.5915

Bearing Bore Max Out-of-Round and Taper:
0.0004

Center to center Length:
6.486-6.490

Connecting Rod max Twist:
0.012 (measured with bars inserted and at 4" away from rod)

Connecting Rod max Bend:
0.004 (measured as above)

Side Clearance:
0.010-0.020 (wear limit 0.023 max)

Bearing to Crank Clearance:
0.0008-0.0026 allowable
0.0008-0.0015 desired

Wall Thickness:
0.0755-0.0760

These are the factory specs. Note that most HP engine builders go for a crank to rod bearing clearance of 0.0025. I prefer 0.002 unless it is meant to be revved over 5500 rpm.

This thread, so far...

Skip Navigation Links.

Collapse <a href=../ForumFE/reply.aspx?ID=14720&Reply=14720><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14720" onclick="return false;">428 NASCAR rods</a> -- <font color=#0000ff>nasgab, <i>10/02/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14720',
contentMargin: 60,
icon: $('anchor14720')
});
</script>

428 NASCAR rods -- nasgab, 10/02/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14768&Reply=14720><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14768" onclick="return false;">RE: 428 NASCAR rods</a> -- <font color=#0000ff>Gerry Proctor, <i>10/08/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14768',
contentMargin: 60,
icon: $('anchor14768')
});
</script>

RE: 428 NASCAR rods -- Gerry Proctor, 10/08/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14777&Reply=14720><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14777" onclick="return false;">RE: 428 NASCAR rods</a> -- <font color=#0000ff>nasgab, <i>10/08/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14777',
contentMargin: 60,
icon: $('anchor14777')
});
</script>

RE: 428 NASCAR rods -- nasgab, 10/08/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14784&Reply=14720><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14784" onclick="return false;">RE: 428 NASCAR rods</a> -- <font color=#0000ff>Gerry Proctor, <i>10/09/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14784',
contentMargin: 60,
icon: $('anchor14784')
});
</script>

RE: 428 NASCAR rods -- Gerry Proctor, 10/09/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14802&Reply=14720><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14802" onclick="return false;">RE: 428 NASCAR rods</a> -- <font color=#0000ff>Terry Bauer, <i>10/12/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14802',
contentMargin: 60,
icon: $('anchor14802')
});
</script>

RE: 428 NASCAR rods -- Terry Bauer, 10/12/2002

Collapse <b>RE: 390 Rod clearances</b> -- <font color=#0000ff>John, <i>10/12/2002</i></font>

RE: 390 Rod clearances -- John, 10/12/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14810&Reply=14720><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14810" onclick="return false;">RE: 390 Rod clearances</a> -- <font color=#0000ff>Terry Bauer, <i>10/12/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14810',
contentMargin: 60,
icon: $('anchor14810')
});
</script>

RE: 390 Rod clearances -- Terry Bauer, 10/12/2002

Although you can mic them....... -- kevin, 10/13/2002