What does LSA do to a cam?

What does LSA do to a cam?

Airflow and LSA A wider LSA moves intake- and exhaust-valve events farther apart and creates less overlap, which hurts intake-wave tuning. “When you’ve properly tuned a performance motor, you create high- and low-pressure waves in the intake and exhaust that help cylinder filling,” said Comp Cams’ Billy Godbold.

What makes a cam choppy?

LSA (lobe separation angle) determines the choppiness, it has to do with the overlap of when both valves are open, as in when the exhaust valve is closing and the intake valve is opening to pull fresh fuel in on the intake stroke after pushing out the burnt fuel. Most GM cams come on a 112, 114 or 116 LSA.

How do I calculate my LSA cam?

To check your LSA you calculate it by adding the intake and exhaust Lobe Centerline figures together and dividing their sum by two (Ex: 112 intake Centerline + 116 exhaust Centerline = 228 / 2 = 114-degree LOBE SEPARATION ANGLE).

What is an aggressive camshaft?

What is an Aggressive Cam? “The ideal cam profile would raise the valves to full lift instantly, hold them open for a specified duration and then close them instantly.

Should I advance my cam timing?

Not to be confused with ignition timing advance, advancing a camshaft will change the timing of the valve events in relation to where the crankshaft is positioned. Changing either affects engine performance, but a camshaft that is properly installed in an advanced position can noticeably improve performance.

What is the best lobe separation?

Some engine specialists refer to it as that 106 sound—the NASCAR and short track oval sound where preferred lobe separation is usually specified between 104 and 106 degrees. The primary function of narrow lobe separation is to impel urgent acceleration off the turns when the throttle is opened.

What Is a Stage 2 cam?

Stage 1 cam sets are used to give increased Torque output in the RPM range below the engine’s Torque peak. Stage 2 cam sets are used to provide more power. If you want to ride situations with higher average speeds, these cams are for you.

What is considered a large cam?

It is listed in degrees of crankshaft rotation. When someone refers to a “big cam,” they mean it has longer duration, not higher Lift. Duration at 0.050″ is the degrees of crankshaft rotation between when the lifter is raised 0.050″ and when it is 0.050″ from its resting position.