What real difference does the lsa on a cam make?
It's hard to say "always" and "never" in these cases.
Absolutely. I agree 100%. I am only saying what I have seen and done. There are so many variables there's no way to nail it down. But, I'll add this.
This is straight from the Wallace Racing site:
Here is the link:
http://www.wallaceracing.com/cambasics.htm
"The lobe separation angle is basically the measurement in degrees of the angle between the intake and exhaust lobes, and is generally between 104 and 118 degrees. This measurement may also be denoted as the lobe displacement angle. Intake and exhaust duration along with the lobe separation angle and camshaft lift combine to determine the amount of overlap, which is the amount of time in which both valves are open. Excess overlap can hurt low rpm performance, and will cause an engine to idle poorly. However, in some engines large amounts of overlap can help high rpm performance by scavenging the cylinders and improving volumetric efficiency. Assuming the lobe separation angle remains the same, the more lift and duration a camshaft has the more overlap it will have. A greater lobe displacement will decrease the amount of overlap, lift and duration being the same. Generally, smaller lobe separation angles cause an engine to produce more midrange torque and high rpm power, and be more responsive, while larger lobe separation angles result in broader torque, improved idle characteristics, and more peak horsepower."
