moregrip

iTrader: (8)

Found this and thought it would be useful


.........................Varying Lobe Separation Angle.....................................
...............Tighten............................ ..............Widen
-------------------------------------------------------------------------
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
-------------------------------------------------------------------------

Lobe Separation Angle
-----------------------------------
Above 114 Deg. = Extremely Wide
114-112 Deg. = Wide
112-110 Deg. = Moderately Wide
110-108 Deg. = Moderate
108-106 Deg. = Moderately Tight
106-104 Deg. = Tight
Below 104 Deg. = Extremely Tight
-----------------------------------

.........................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

Sport Side

iTrader: (6)

That's helpful.

I find the lsa descriptions funny. A 112* lsa in the ls1 world is considered "tight". At least, that's what the general opinion is.

Good find. You should see about posting that in the Cam thread. I'm sure a lot will find the info helpful.

Zick

iTrader: (18)

Excellent find, I was just asking about the LSA's in the CAM thread but never got a reply.

Definatly sticky this into the CAM thread.

Zick

iTrader: (18)

Quick question since I'm here.
For my LS1, I'm thinking about the TR220/220. Would there be a huge difference between the LSA 112 and 114?
Don't really know which would be better and why.

moregrip

iTrader: (8)

try this:

http://www.ls2.com/forums/showthread...646#post327646

Zick

iTrader: (18)

Excellent find Grippy

FILE

iTrader: (5)

Very good info....

moregrip

iTrader: (8)

thanks guys, figured this might help

one03sierra

iTrader: (1)

damnit i need to quit reading thast. makes me want a smaller cam for mine. especially since the nos is gone. need to save some dough now and sell my cam.

rosscob

Seem like you go thru cams like they are disposable. Of course you are making more HP than anyone I know of on all motor. Please keep the rest of us informed when you swap again and what kind of power it makes.