Editing Cam and compression ratio compatibility
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==Matching cam to compression ratio== | ==Matching cam to compression ratio== | ||
Sometimes it's difficult trying to explain to fellows who are new to hot rodding that you have to match the characteristics of the camshaft to the static compression ratio of the motor along with the operating range where the cam makes power. The camshaft is not a stand-alone piece. It must be coordinated with other motor and drivetrain parts in order to arrive at a combination of parts that will all work together toward a common goal. | Sometimes it's difficult trying to explain to fellows who are new to hot rodding that you have to match the characteristics of the camshaft to the static compression ratio of the motor along with the operating range where the cam makes power. The camshaft is not a stand-alone piece. It must be coordinated with other motor and drivetrain parts in order to arrive at a combination of parts that will all work together toward a common goal. | ||
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==Additional reading/engine theory== | ==Additional reading/engine theory== | ||
{{Note1}} | {{Note1}} | ||
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====Dynamic compression ratio calculators==== | ====Dynamic compression ratio calculators==== | ||
− | *[http://www.empirenet.com/pkelley2/DynamicCR.html | + | *[http://www.empirenet.com/pkelley2/DynamicCR.html Kelly calculator/info] |
− | *[http://www. | + | *[http://www.kb-silvolite.com/calc.php?action=comp2 Keith Black calculator] |
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===Cam phasing=== | ===Cam phasing=== | ||
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*[http://www.wallaceracing.com/dynamic-cr.php Wallace Racing DCR calculator] | *[http://www.wallaceracing.com/dynamic-cr.php Wallace Racing DCR calculator] | ||
*[http://www.empirenet.com/pkelley2/DynamicCR.html Kelly DCR calculator] | *[http://www.empirenet.com/pkelley2/DynamicCR.html Kelly DCR calculator] | ||
− | *[http://www. | + | *[http://www.kb-silvolite.com/calc.php?action=comp2 KB/Silvolite DCR calculator] |
*[http://www.rbracing-rsr.com/comprAdvHD.htm RSR DCR calculator] | *[http://www.rbracing-rsr.com/comprAdvHD.htm RSR DCR calculator] | ||
{{Note1}} Some dynamic compression rtatio calculators (like KBs) ask for an additional 15 degrees of duration be added to the IVC @ 0.050" lift point figure. This works OK on older, slower ramped cam lobes, but the faster lobe profiles may need to have 25 degrees or more added to be accurate. | {{Note1}} Some dynamic compression rtatio calculators (like KBs) ask for an additional 15 degrees of duration be added to the IVC @ 0.050" lift point figure. This works OK on older, slower ramped cam lobes, but the faster lobe profiles may need to have 25 degrees or more added to be accurate. | ||
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===Static compression ratio=== | ===Static compression ratio=== | ||
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[[Category:Camshaft]] | [[Category:Camshaft]] | ||
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General Application Chart * | General Application Chart * | ||
Advertised | Advertised | ||
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290°+ 3.73+ 3400-8000 | 290°+ 3.73+ 3400-8000 | ||
10.5 to 12 3500+ | 10.5 to 12 3500+ | ||
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