Lobe Separation Angle "LSA "Jump to Latest Follow 1 - 17 of 17 Posts . If you take any of the . Whats a good LOBE Separation for nitrous | Yellow Bullet Forums But, you may wonder knowing that a higher valve clearance rate reduces the chance of damaging the valve by the piston. I normally run a 106 to a 108 because I like the "hit" a tighter LC cam has when it come up on the came. Howards Cam Vs Comp Cam: Which Is The Best Option For You? LSA helps determine the cam's behavior; you can take a given set of lift and duration figures, change the LSA, and get cams with vastly different characteristics. 13 The three power curves indicate that the wide (120-degree) LSA (green lines) lost considerable torque to the other two cams. 108 Lobe Separation These are my motors specs 1979 - 347 Stroker 10:1 Compression Holley 670 Street Avenger or a Holley 650 (I have both) Roush 200 Cylinder Heads (minor head work) 1.6 Roller Rockers Shorty BBK Headers 373 Rear End 5 Speed Transmission Cross Gap Intake (Power Band 1500-6500) FlowMaster Dual Exhaust (of course no Cats) MSD 6Al The Crane has a smoother idle, broader power band, and . LSA is a result of valve timing events. But, the internal processings are much more complicated. 106 LSA: The scale of efficient compression rises at 106 LSA. [img]http://i67.photobucket.com/albums/h291/downsideup09/DSCF2616-1.jpg[/img], [img]http://photos-g.ak.fbcdn.net/hphotos-ak-snc1/hs139.snc1/5928_111214857139_110806152139_2127222_6826389_n.jpg[/img]. 106 LSA: You can see an increasing EGR effect at 106 LSA. 106 LSA: As you know, the intake and exhaust lobes centerline distance is known as lobe separation angle. A 112-114 degree lobe center will have a better idle and produce more vacuum with less overlap. For example, an oval-track small-block that needs to motivate the car off the turns quickly might have a narrow LSA of around 106 degrees, resulting in more overlap. Boom, you get the lobe separation angle of that engine. Also know as Lobe Separation; Lobe Center is simply the distance between the peak opening points on the Intake and Exhaust lobes. Split duration/lift only helps when your intake/exhaust ratio is low on the exhaust side. If the exhaust valve closes too early it will trap some of the spent gases in the combustion chamber, and if it closes too late it will over-scavenge the chamber and take out too much of the charge, again creating an artificially lean condition.

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