What is a good lobe separation angle?
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 the difference between 114 and 112 LSA?
According to Super Chevy magazine: A wider LSA figure (i.e. 114) moves the lobe centerlines further apart and will smooth your idle due to the decrease in overlap that it creates. The lower the figure (i.e. 112) moves the centerlines closer and will increase bottom end power, but your idle will suffer along with it.
How does LSA affect idle?
A wide LSA reduces valve overlap, softens the idle and improves overall drivability–especially on the street where performance engines benefit from 112 to 114 LSA.
What does LSA on a cam mean?
Lobe-Separation Angle
What Is Lobe-Separation Angle? LSA is the distance from the centerline of the intake lobe to the centerline of exhaust lobe. It is the average centerline between both lobes and expressed in degrees ranging from 95 on the extremely narrow/tight side to upward of 120 on the wide end.
What does +2 mean on cam LSA?
The + 2 or + 4 designation after the LSA is the amount of advance ground into the cam if it was installed straight up. This will effect the intake centerline like you stated. Neal.
How can I tell what LSA my cam is?
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 does LSA engine stand for?
LSA=Loud Stupendous Accelleration.
What LSA makes a cam choppy?
Registered. 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.