Forum Reply - JCO Consulting Services


Home	Free Stuff	Graphics	Programming Services	Contact Us	Ford Stuff

Original Message

That's not a problem.

By Royce Peterson - 10/22/2002 9:21:56 PM; IP 205.188.209.172

Oversized big block Chevy size blanks are the answer using an FE ford Forging. So Chevy 427 standard rings at 4.250", .030" over at 4.280", .060" over at 4.310" are the typical choices used by most modern builders of 427 Fords. These yield overbores of .017", .047", and .077" respectively. Obviously the .077" oversize is a long shot but once in a blue moon someone gets away with it in a filled race only block. Ford 427 Pistons are typically available in .017, .030 and .047 for this reason and you need only find out the cylinder wall thickness available before boring, keeping these choices in mind. Boring can't acyually happen until the pistons are delivered and each bore can be carefully matched to a piston as sizes can vary from ordered spec.

People have actually used 427 Chev pistons but the valve reliefs are wrong and pin diameter is wrong so no money can be saved unless you are a machinist and the pistons are free. It's best to buy the pistons from Ross, JE, Venolia, Aries, Wiseco or one of the other custom piston companies. There are a lot of good ones with great CNC machines so prices are semi - reasonable.

Royce Peterson

This thread, so far...

Skip Navigation Links.

Collapse <a href=../ForumFE/reply.aspx?ID=14911&Reply=14911><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14911" onclick="return false;">427 bore</a> -- <font color=#0000ff>ErikB, <i>10/21/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14911',
contentMargin: 60,
icon: $('anchor14911')
});
</script>

427 bore -- ErikB, 10/21/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14914&Reply=14911><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14914" onclick="return false;">Get a sonic test of cylinder wall thickness</a> -- <font color=#0000ff>Royce Peterson, <i>10/22/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14914',
contentMargin: 60,
icon: $('anchor14914')
});
</script>

Get a sonic test of cylinder wall thickness -- Royce Peterson, 10/22/2002

Collapse <a href=../ForumFE/reply.aspx?ID=14926&Reply=14911><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor14926" onclick="return false;">Oversized rings and pistons</a> -- <font color=#0000ff>Travis Miller, <i>10/22/2002</i></font><script type="text/javascript">
new HelpBalloon({
dataURL: 'replyb.aspx?ID=14926',
contentMargin: 60,
icon: $('anchor14926')
});
</script>

Oversized rings and pistons -- Travis Miller, 10/22/2002

Collapse <b>That's not a problem.</b> -- <font color=#0000ff>Royce Peterson, <i>10/22/2002</i></font>

That's not a problem. -- Royce Peterson, 10/22/2002

RE: That's not a problem. -- Tim P., 01/08/2004

Sonic readings -- Steve M., 01/08/2004