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Original Message

It all comes down to bore spacing

By Bill Conley - 09/14/2005 12:10:58 PM; IP 68.120.231.207

The fundamental number for any engine family is the spacing between cylinder bores. You'll see members of the same engine family with different bores and strokes (390,427,428) and even different deck heights (302, 351W), but you'll never see memebers of the same engine family with different bore spacing.

It seems the big block/ small block nomenclature originated with Chevys. Our Fords are a bit more murky. The FE bore spacing makes it more of a "medium block", with bore spacing in between the Windsor engines and the "385" series Lima engines.

JMO, but I did work at Ford as an engine engineer.

-Bill

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Collapse <a href=../ForumFE/reply.aspx?ID=25777&Reply=25777><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor25777" onclick="return false;">Difference between big and small blocks</a> -- <font color=#0000ff>Tristan, <i>09/11/2005</i></font><script type="text/javascript">
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Difference between big and small blocks -- Tristan, 09/11/2005

Collapse <a href=../ForumFE/reply.aspx?ID=25779&Reply=25777><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor25779" onclick="return false;">RE: Difference between big and small blocks</a> -- <font color=#0000ff>Jeff H., <i>09/11/2005</i></font><script type="text/javascript">
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RE: Difference between big and small blocks -- Jeff H., 09/11/2005

Collapse <a href=../ForumFE/reply.aspx?ID=25784&Reply=25777><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor25784" onclick="return false;">That's superficial, Jeff, and can be proven wrong.</a> -- <font color=#0000ff>Gerry Proctor, <i>09/13/2005</i></font><script type="text/javascript">
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That's superficial, Jeff, and can be proven wrong. -- Gerry Proctor, 09/13/2005

Collapse <b>It all comes down to bore spacing</b> -- <font color=#0000ff>Bill Conley, <i>09/14/2005</i></font>

It all comes down to bore spacing -- Bill Conley, 09/14/2005

theory of relativity? -- John, 09/14/2005

Collapse <a href=../ForumFE/reply.aspx?ID=25801&Reply=25777><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor25801" onclick="return false;">RE: That's superficial, Jeff, and can be proven wrong.</a> -- <font color=#0000ff>Jeff H., <i>09/17/2005</i></font><script type="text/javascript">
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RE: That's superficial, Jeff, and can be proven wrong. -- Jeff H., 09/17/2005

Let's keep the arguments friendly, Ok? Just 'splain. :-) [n/m] -- Mr F, 09/18/2005

Gerry.... -- Jeff H., 09/20/2005