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RE: Cam Specs? Low Vacuum = No Brakes

By Derek - 03/21/2002 3:08:00 AM; IP 207.102.191.56

This sounds a little weird, Dave! I'm sure someone else will come up with the published specs, but my recollection is that the only FE cam in the early MotorSports program wasn't particularly wild...something about what you'd want in a tow rig, certainly not much hotter than a Comp 260-type cam.

You might want to verify WHAT the cam you installed actually is. Did it have any of Ford's typical casting symbols, between the last lobe and last journal? Were there any other marking on it? What kind of RPM are you getting out of it?

If you can positively rule out 'external' vacuum leaks, I'd suggest checking the cam timing, ie. is it Advanced/Straight Up/Retarded, and then checking your rocker arm adjustments, etc., to see if there's something amiss there.

You should be able to run a cam with up to something in the neighborhood of 230 degrees duration (@ .050" lifter rise) without any loss of idle vacuum bad enough to affect your brakes.

This thread, so far...

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Cam Specs? Low Vacuum = No Brakes -- Dave Alton, 03/20/2002

RE: Cam Specs? Low Vacuum = No Brakes -- Derek, 03/21/2002

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RE: Cam Specs? Low Vacuum = No Brakes -- Bob, 03/21/2002

Collapse <a href=../ForumFE/reply.aspx?ID=12171&Reply=12140><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor12171" onclick="return false;">RE: Cam Specs? Good HP = No Brakes</a> -- <font color=#0000ff>Ray, <i>03/21/2002</i></font><script type="text/javascript">
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RE: Cam Specs? Good HP = No Brakes -- Ray, 03/21/2002

Collapse <a href=../ForumFE/reply.aspx?ID=12172&Reply=12140><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor12172" onclick="return false;">RE: Cam Specs? Good HP = No Brakes</a> -- <font color=#0000ff>Bob, <i>03/21/2002</i></font><script type="text/javascript">
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RE: Cam Specs? Good HP = No Brakes -- Bob, 03/21/2002

Collapse <a href=../ForumFE/reply.aspx?ID=12174&Reply=12140><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor12174" onclick="return false;">RE: Cam Specs? Good HP = No Brakes</a> -- <font color=#0000ff>Dave, <i>03/22/2002</i></font><script type="text/javascript">
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RE: Cam Specs? Good HP = No Brakes -- Dave, 03/22/2002

RE: Cam Specs? Good HP = No Brakes -- Bob, 03/22/2002