Originally Posted by Superado

Originally Posted by TurboBerserker

For a turbo, reverse splits are awesome. For an SC, you need the exhaust bias so your standard dual pattern cam is preferred. The lsa is specific to try to get as close to 0* overlap as you can. See my rule of thumb in one of the first couple of posts.


Some general info on LSA and cam timing:

.........................Varying Lobe Separation Angle.....................................
...............Tighten............................ ..............Widen
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Moves Torque to Lower RPM..............Raise Torque to Higher RPM
Increases Maximum Torque................Reduces Maximum Torque
Narrow Powerband...........................Broadens Power Band
Builds Higher Cylinder Pressure............Reduce Maximum Cylinder Pressure
Increase Chance of Engine Knock........Decrease Chance of Engine Knock
Increase Cranking Compression...........Decrease Cranking Compression
Increase Efective Compression...........Decrease Efective Compression
Idle Vacuum is Reduced....................Idle Vacuum is Increased
Idle Quality Suffers..........................Idle Quality Improves
Open Valve-Overlap Increases...........Open Valve-Overlap Decreases
Closed Valve-Overlap Increases.........Closed Valve-Overlap Decreases
Natural EGR Efect Increases..............Natural EGR Efect is Reduced
Decreases Piston-to-Valve Clerance....Increases Piston-to-Valve Clerance
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.........................Advancing/Retarding Cam Timing................................
...............Advancing.......................... ........Retarding
*Begins Intake Event Sooner...................Delays Intake Event
*Open Intake Valve Sooner...............Opens Intake Valve Open Later
*Builds More Low-End Torque..............Builds More High-End Torque

*Decrease Piston-Intake........................Increase Piston-Intake
...Valve Clearance................................... Valve Clearance

*Increase Piston-Exhaust........................Decrease Piston-Exhaust
....Valve Clearance.....................................Valv e Clearance