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Original Message
Nope.
By Dave Shoe - 12/07/2001 11:29:06 PM; IP 216.243.158.185
Basically, I was just spouting the notion that you can get a superior stretch displacement from the 3/8" rodbolt over the 13/32" hybrid which has a shorter stretch beam. Extra stretch assures a more constant clamping force, even if the rodcap relaxes as time goes on.

Also, if you do not use a socket extension on the torque wrench, it seems quite possible that you could stretch the bolt crooked, due to the slop in the hole and the side-thrusts of the torque wrench. An extension would eliminate side loading while torquing.

Note that Ford's trilobe capscrew for the LeMans rod would seem to have this ability to bend when torqued (0.365 shank in a .435" hole) - I wonder if any of these bolts ever broke simply because they were tightened a little off-center (due to not using a socket extension), creating tremendous stresses on the one side of the bolt. Maybe bending them is not possible - I don't know. If I'd engineered the tri-lobe bolt, I'd have built a step under the head to assure the bolt would remain mechanically constrained to the center of the hole. If you torque a 3/8" bolt in a 3/8" hole, there is no way to bend the bolt sideways while tightening, extension or not.

Also, the "comfy" notion that a 3/8" drilled FE conrod is meatier (less drilled-out) makes it easy for most readers to get the gut feel that the 3/8" rod is the way to go.

Looks like I managed to sidestep any hyperventilating this time around.. That's good.

I presently run stock 13/32" rods in my stroker 427, and I believe the ARP 13/32 hybrids are probably superior to these, but I'm not certain and I don't want to experiment on this topic. Future "moderate performance" builds will involve 3/8" rods w/Arp bolts, because I strongly believe these are the best value going.

Shoe.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=9868&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9868" onclick="return false;">New 13/32 connecting rod bolts?!?</a>&nbsp;-- <font color=#0000ff>Joshua Carroll, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9868', contentMargin: 60, icon: $('anchor9868') }); </script>  New 13/32 connecting rod bolts?!? -- Joshua Carroll, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9871&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9871" onclick="return false;">RE: New 13/32 connecting rod bolts?!?</a>&nbsp;-- <font color=#0000ff>Mike McQuesten, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9871', contentMargin: 60, icon: $('anchor9871') }); </script>  RE: New 13/32 connecting rod bolts?!? -- Mike McQuesten, 12/07/2001
 RE: New 13/32 connecting rod bolts?!? -- Joshua Carroll, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9876&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9876" onclick="return false;">I'd avoid the ARP bolts.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9876', contentMargin: 60, icon: $('anchor9876') }); </script>  I'd avoid the ARP bolts. -- Dave Shoe, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9880&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9880" onclick="return false;">RE: Now, I found out!</a>&nbsp;-- <font color=#0000ff>Mike McQuesten, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9880', contentMargin: 60, icon: $('anchor9880') }); </script>  RE: Now, I found out! -- Mike McQuesten, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9884&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9884" onclick="return false;">I think I may have started the bad rumors.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9884', contentMargin: 60, icon: $('anchor9884') }); </script>  I think I may have started the bad rumors. -- Dave Shoe, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9886&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9886" onclick="return false;">ARP bolts</a>&nbsp;-- <font color=#0000ff>Royce Peterson, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9886', contentMargin: 60, icon: $('anchor9886') }); </script>  ARP bolts -- Royce Peterson, 12/07/2001
Collapse <b>Nope.</b>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>12/07/2001</i></font>Nope. -- Dave Shoe, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9913&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9913" onclick="return false;">RE: Nope.</a>&nbsp;-- <font color=#0000ff>Mario428, <i>12/09/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9913', contentMargin: 60, icon: $('anchor9913') }); </script>  RE: Nope. -- Mario428, 12/09/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9917&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9917" onclick="return false;">I stand by my bad opinion.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>12/09/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9917', contentMargin: 60, icon: $('anchor9917') }); </script>  I stand by my bad opinion. -- Dave Shoe, 12/09/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9919&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9919" onclick="return false;">RE: I stand by my bad opinion.</a>&nbsp;-- <font color=#0000ff>Chip Huffman, <i>12/09/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9919', contentMargin: 60, icon: $('anchor9919') }); </script>  RE: I stand by my bad opinion. -- Chip Huffman, 12/09/2001
 ARP PI/CJ bolts are a special design. -- Dave Shoe, 12/09/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9918&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9918" onclick="return false;">About the strength of the bolt...</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>12/09/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9918', contentMargin: 60, icon: $('anchor9918') }); </script>  About the strength of the bolt... -- Dave Shoe, 12/09/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9930&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9930" onclick="return false;">RE: About the strength of the bolt...</a>&nbsp;-- <font color=#0000ff>Mario428, <i>12/10/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9930', contentMargin: 60, icon: $('anchor9930') }); </script>  RE: About the strength of the bolt... -- Mario428, 12/10/2001
 RE: About the strength of the bolt... -- Dave Shoe, 12/10/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9955&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9955" onclick="return false;">RE: Nope.</a>&nbsp;-- <font color=#0000ff>Bob, <i>12/11/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9955', contentMargin: 60, icon: $('anchor9955') }); </script>  RE: Nope. -- Bob, 12/11/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9957&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9957" onclick="return false;">An FE forging can be drilled either way.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>12/11/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9957', contentMargin: 60, icon: $('anchor9957') }); </script>  An FE forging can be drilled either way. -- Dave Shoe, 12/11/2001
 I found a bolt science web page !! -- Paul C., 12/11/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9879&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9879" onclick="return false;">RE: New 13/32 connecting rod bolts?!?</a>&nbsp;-- <font color=#0000ff>Bob, <i>12/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9879', contentMargin: 60, icon: $('anchor9879') }); </script>  RE: New 13/32 connecting rod bolts?!? -- Bob, 12/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9961&Reply=9868><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9961" onclick="return false;">Valve Spring Cups and Rod Bolts!</a>&nbsp;-- <font color=#0000ff>Joshua Carroll, <i>12/11/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9961', contentMargin: 60, icon: $('anchor9961') }); </script>  Valve Spring Cups and Rod Bolts! -- Joshua Carroll, 12/11/2001
 RE: Valve Spring Cups and Rod Bolts! -- Bob, 12/11/2001
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