Hi, currently building a 406 sbc with 062 vortec heads. The valve guides have not been machined down. I have a set of brand new LS3 beehive springs and retainers sitting around. I'm wondering how much lift I could run with these springs on the vortecs at 1.698-1.708" install height. I believe at 1.800" install height LS3 springs are good to .570" lift. I would think the first cam would be better for my build news, but it has .008" more lift. The two cams I'm looking at are:
Lobe center 108
Advertised Duration: Intake / Exhaust 296 / 308
Duration @ .050" Lift: Intake / Exhaust 232 / 242
Lobe Lift: Intake / Exhaust .333 / .345
Rocker Ratio: Intake / Exhaust 1.5 / 1.5
Gross Valve Lift: Intake / Exhaust .500 / .518
OR:
Lobe center 108
Advertised Duration: Intake / Exhaust 300 / 308
Duration @ .050" Lift: Intake / Exhaust 240 / 248
Lobe Lift: Intake / Exhaust .328 / .340
Rocker Ratio: Intake / Exhaust 1.5 / 1.5
Gross Valve Lift: Intake / Exhaust .492 / .510
Looking to rev the engine to 6000-6500 MAX...
Any help would be appreciated,
Thanks
Lobe center 108
Advertised Duration: Intake / Exhaust 296 / 308
Duration @ .050" Lift: Intake / Exhaust 232 / 242
Lobe Lift: Intake / Exhaust .333 / .345
Rocker Ratio: Intake / Exhaust 1.5 / 1.5
Gross Valve Lift: Intake / Exhaust .500 / .518
OR:
Lobe center 108
Advertised Duration: Intake / Exhaust 300 / 308
Duration @ .050" Lift: Intake / Exhaust 240 / 248
Lobe Lift: Intake / Exhaust .328 / .340
Rocker Ratio: Intake / Exhaust 1.5 / 1.5
Gross Valve Lift: Intake / Exhaust .492 / .510
Looking to rev the engine to 6000-6500 MAX...
Any help would be appreciated,
Thanks