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RE: Derek, what do you think of the Lunati replacement
By Derek - 03/13/2002 5:52:24 AM; IP 207.102.191.65
James, since we're talking about the Lunati version, which is not necessarily 'exactly' the same as the stock Ford C6AZ-B, I'd have to say that your Comp Cams unit definitely gives something up to it.

If you check their listings for other engines (even different brands), you'll find that this same grind appears over and over, with just the lift varying due to rocker arm ratio. These are 'generic' cams, with little real development work for each engine.

Again, although there have been signicant improvements in camshaft design over the last three decades, it can still be said that NOBODY knew more about their motors than the factory.

On the 427, which was designed to run within a (relatively) narrow RPM range, Ford gave it lots of duration and lift (for its day), and a single-pattern design.

However, on the 390GT (which is where the 428CJ cam originates from), which was most often coupled to an automatic transmission and 'street' gears, they went with a dual-pattern design, to acknowledge the limitations of the factory heads and exhaust systems of the day, and make it more tractable on the street.

You don't have all that much duration in your Comp cam, but you do have the single-pattern design. With the Lunati profile at 224°/232° @ .050", and .481"/.490" lift, you're giving up 6°-14° duration, and gaining almost nothing in net lift.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=11936&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11936" onclick="return false;">any ideas on a 1/4mile time or hp guess on this CJ</a>&nbsp;-- <font color=#0000ff>mike allen, <i>03/10/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11936', contentMargin: 60, icon: $('anchor11936') }); </script>  any ideas on a 1/4mile time or hp guess on this CJ -- mike allen, 03/10/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11937&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11937" onclick="return false;">more on that cam please!</a>&nbsp;-- <font color=#0000ff>James, <i>03/10/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11937', contentMargin: 60, icon: $('anchor11937') }); </script>  more on that cam please! -- James, 03/10/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11944&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11944" onclick="return false;">cam specs</a>&nbsp;-- <font color=#0000ff>mike allen, <i>03/11/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11944', contentMargin: 60, icon: $('anchor11944') }); </script>  cam specs -- mike allen, 03/11/2002
 RE: cam specs -- James, 03/11/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11938&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11938" onclick="return false;">RE: any ideas on a 1/4mile time or hp guess on thi</a>&nbsp;-- <font color=#0000ff>Mike McQuesten, <i>03/10/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11938', contentMargin: 60, icon: $('anchor11938') }); </script>  RE: any ideas on a 1/4mile time or hp guess on thi -- Mike McQuesten, 03/10/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11946&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11946" onclick="return false;">RE: any ideas on a 1/4mile time or hp guess on thi</a>&nbsp;-- <font color=#0000ff>peter(pop428), <i>03/11/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11946', contentMargin: 60, icon: $('anchor11946') }); </script>  RE: any ideas on a 1/4mile time or hp guess on thi -- peter(pop428), 03/11/2002
 nope. High 13's more like it -- James, 03/11/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11952&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11952" onclick="return false;">shouldn't it be low 13's</a>&nbsp;-- <font color=#0000ff>mike allen, <i>03/11/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11952', contentMargin: 60, icon: $('anchor11952') }); </script>  shouldn't it be low 13's -- mike allen, 03/11/2002
 Middle maybe. -- James, 03/12/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11941&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11941" onclick="return false;">RE: any ideas on a 1/4mile time or hp guess on this CJ</a>&nbsp;-- <font color=#0000ff>Norm F., <i>03/10/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11941', contentMargin: 60, icon: $('anchor11941') }); </script>  RE: any ideas on a 1/4mile time or hp guess on this CJ -- Norm F., 03/10/2002
 My car had problems and still ran.... -- James, 03/10/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11961&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11961" onclick="return false;">RE: any ideas on a 1/4mile time or hp guess on this CJ</a>&nbsp;-- <font color=#0000ff>Derek, <i>03/12/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11961', contentMargin: 60, icon: $('anchor11961') }); </script>  RE: any ideas on a 1/4mile time or hp guess on this CJ -- Derek, 03/12/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11965&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11965" onclick="return false;">Derek, what do you think of the Lunati replacement</a>&nbsp;-- <font color=#0000ff>James, <i>03/12/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11965', contentMargin: 60, icon: $('anchor11965') }); </script>  Derek, what do you think of the Lunati replacement -- James, 03/12/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11966&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11966" onclick="return false;">RE: Derek, what do you think of the Lunati replacement</a>&nbsp;-- <font color=#0000ff>Norm F., <i>03/12/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11966', contentMargin: 60, icon: $('anchor11966') }); </script>  RE: Derek, what do you think of the Lunati replacement -- Norm F., 03/12/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11967&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11967" onclick="return false;">RE: Derek, what do you think of the Lunati replacement</a>&nbsp;-- <font color=#0000ff>Eric, <i>03/13/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11967', contentMargin: 60, icon: $('anchor11967') }); </script>  RE: Derek, what do you think of the Lunati replacement -- Eric, 03/13/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11968&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11968" onclick="return false;">RE: Derek, what do you think of the Lunati replacement</a>&nbsp;-- <font color=#0000ff>Derek, <i>03/13/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11968', contentMargin: 60, icon: $('anchor11968') }); </script>  RE: Derek, what do you think of the Lunati replacement -- Derek, 03/13/2002
 RE: Derek, what do you think of the Lunati replacement -- Eric, 03/13/2002
 RE: Derek, what do you think of the Lunati replacement -- Norm F., 03/13/2002
Collapse <b>RE: Derek, what do you think of the Lunati replacement</b>&nbsp;-- <font color=#0000ff>Derek, <i>03/13/2002</i></font>RE: Derek, what do you think of the Lunati replacement -- Derek, 03/13/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11976&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11976" onclick="return false;">does a few degrees of duration make a big diff.</a>&nbsp;-- <font color=#0000ff>mike allen, <i>03/13/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11976', contentMargin: 60, icon: $('anchor11976') }); </script>  does a few degrees of duration make a big diff. -- mike allen, 03/13/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11984&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11984" onclick="return false;">RE: does a few degrees of duration make a big diff.</a>&nbsp;-- <font color=#0000ff>Norm F., <i>03/13/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11984', contentMargin: 60, icon: $('anchor11984') }); </script>  RE: does a few degrees of duration make a big diff. -- Norm F., 03/13/2002
Collapse <a href=../ForumFE/reply.aspx?ID=11985&Reply=11936><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor11985" onclick="return false;">What if I were to advance the CJ cam 2 deg.</a>&nbsp;-- <font color=#0000ff>James, <i>03/13/2002</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=11985', contentMargin: 60, icon: $('anchor11985') }); </script>  What if I were to advance the CJ cam 2 deg. -- James, 03/13/2002
 RE: What if I were to advance the CJ cam 2 deg. -- Norm F., 03/13/2002
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