Dynamic compression ratio
m (→Dynamic CR: fix link) |
m (→Dynamic CR) |
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===Dynamic CR=== | ===Dynamic CR=== | ||
| + | *[http://www.empirenet.com/pkelley2/DynamicCR.html Dynamic compression calculator] by Kelly | ||
| + | *[http://www.uempistons.com/calc.php?action=comp2 Dynamic compression calculator] by KB | ||
*[http://www.wallaceracing.com/dynamic-cr.php Wallace Racing DCR calculator] | *[http://www.wallaceracing.com/dynamic-cr.php Wallace Racing DCR calculator] | ||
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*[http://www.rbracing-rsr.com/comprAdvHD.htm RSR DCR calculator] | *[http://www.rbracing-rsr.com/comprAdvHD.htm RSR DCR calculator] | ||
| + | {{Note1}} Some dynamic compression ratio 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.<br> | ||
| − | {{Note1}}If the intake closing ( | + | {{Note1}}If the intake valve closing (IVC) point isn't known, it can be calculated: |
# Divide the intake duration by 2 | # Divide the intake duration by 2 | ||
# Add the results to the lobe separation angle (LSA) | # Add the results to the lobe separation angle (LSA) | ||
# Subtract any ground-in advance | # Subtract any ground-in advance | ||
# Subtract 180 | # Subtract 180 | ||
| − | This result does not need to have any amount added, like the KB calculator calls for. | + | This result does not need to have any amount added to the IVC point, like the KB calculator calls for. |
==DCR and pump gasoline== | ==DCR and pump gasoline== | ||
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