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RE: What the heck you wanna overbore the thing for?
By Lew - 02/23/2004 6:22:28 PM; IP 63.187.73.36
Dave Shoe,

I have a 1967 390 Cast C7MEA. It has been OBed 60. I am concern about over heating. I have noticed that the 428 has the same casting number and is bored stock to 4.13. The 390 would be 4.05 + 0.06=4.11.

I tried the drill bit test on the front two core plugs. On one side, a 15/64 drill-bit would not go through. A 7/32 bit barely past in between the cylinders. On the other side, the 15/64 bit would only pass at the top of the cylinder. It would not penetrate between the cylinders at the center or below.
What does this tell me about the wall thickness and do you think I will have a problem with overheating?
Thanks in advance.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=5301&Reply=5301><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor5301" onclick="return false;">428 Wrist Pin Clearances</a>&nbsp;-- <font color=#0000ff>Rollie H, <i>03/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=5301', contentMargin: 60, icon: $('anchor5301') }); </script>  428 Wrist Pin Clearances -- Rollie H, 03/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=5303&Reply=5301><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor5303" onclick="return false;">RE: 428 Wrist Pin Clearances</a>&nbsp;-- <font color=#0000ff>kevin, <i>03/07/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=5303', contentMargin: 60, icon: $('anchor5303') }); </script>  RE: 428 Wrist Pin Clearances -- kevin, 03/07/2001
Collapse <a href=../ForumFE/reply.aspx?ID=5322&Reply=5301><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor5322" onclick="return false;">Oops! Need an extra zero.</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=5322', contentMargin: 60, icon: $('anchor5322') }); </script>  Oops! Need an extra zero. -- Dave Shoe, 03/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=5323&Reply=5301><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor5323" onclick="return false;">Oh, also...</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=5323', contentMargin: 60, icon: $('anchor5323') }); </script>  Oh, also... -- Dave Shoe, 03/08/2001
 RE: Oh, also... -- Rollie H, 03/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=5330&Reply=5301><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor5330" onclick="return false;">RE: Oh, also...</a>&nbsp;-- <font color=#0000ff>Jerry Wietzke, <i>03/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=5330', contentMargin: 60, icon: $('anchor5330') }); </script>  RE: Oh, also... -- Jerry Wietzke, 03/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=5374&Reply=5301><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor5374" onclick="return false;">What the heck you wanna overbore the thing for?</a>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>03/09/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=5374', contentMargin: 60, icon: $('anchor5374') }); </script>  What the heck you wanna overbore the thing for? -- Dave Shoe, 03/09/2001
Collapse <b>RE: What the heck you wanna overbore the thing for?</b>&nbsp;-- <font color=#0000ff>Lew, <i>02/23/2004</i></font>RE: What the heck you wanna overbore the thing for? -- Lew, 02/23/2004
 Your drill bit numbers are good. -- Dave Shoe, 02/24/2004
 FE Wall Thickness -- Leo, 03/10/2001
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