need help with a cam question???
need help with a cam question??? i bought a coustom girnd cam which is .585intake, .595exhaust, 235/242 with a LSA of 112+4. here is my question, what does +4 on the 112 mean. and what does this mean when you install the cam? Does this mean i have to install the cam advanced 4 degrees or im i just going to line up the marks form the cam to the crank? 
Originally Posted by regorih
i bought a coustom girnd cam which is .585intake, .595exhaust, 235/242 with a LSA of 112+4. here is my question, what does +4 on the 112 mean. and what does this mean when you install the cam? Does this mean i have to install the cam advanced 4 degrees or im i just going to line up the marks form the cam to the crank?
Originally Posted by dhdenney
The +4 is 4 degress advance built right in. Just line up the marks. The guys at Comp told me that most cams for our car (off the shelf and custom) are all +4 anyway. No special installation necessary. Your cam is similar to mine, what's your cubes? What injectors are you running? I had a post on injectors but not getting anywhere. I'm needing to downgrade and was looking for what size of injectors people had. I had seen both 30# and 36# in 396 motors and was wanting opinions.
He has a 383 on 30# injectors.
The 112 is Lobe Seperation Angle which is pretty typical for LT1s, tighter like 108 would mean a nasty idle with bigger peak numbers, wider like 114 will mellow the idle and produce less peak power but have a wider powerband and is sometimes used to bandaid the selection of too big a duration. The +4 was already covered, playing with that number can affect where the powerband falls too.
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Originally Posted by regorih
NO i have the turbo 383 the n/a 383 is my friend , thats his build up 
Liar....just because I'm building something with boost now you all up on da nutz
....You and your wet dreams of boost 
(yet you don't know anything about it).....Look and learn boy! 
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FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Originally Posted by INTMD8
He does this too much
, just like that. He calls them his ballbats.... 
Originally Posted by regorih
NO i have the turbo 383 the n/a 383 is my friend , thats his build up
And to the cam question what those guys said are on...I just ordered a custom grind kinda like that...its 236/245 114lsa .569/.580