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Old 04-19-2011, 10:42 AM
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SBC cam selection

I'm doing a build for my 66 Nova SS. It's down to cam selection time. I have 4 cams that I'm considering. The car is street only. Looking to make 375-400 hp. with good low end, mid range power. Will definitely be getting a hydraulic roller. Need enough vacuum for PB.

355 ci, all forged, balanced
~10-10.25:1 SCR
Brodix IK180 heads
Edelbrock Performer RPM
Holley 670
MSD 6a
3:73 gears
THM 350 w/2500 stall
Scorpion 1.5 roller rockers
Sanderson shorty headers - 1 5/8 tubes into 2 1/2 exhaust
Power front disc brakes

The cam list:
Howards Cams CL110255
Cam Style Hydraulic roller tappet
Basic Operating RPM Range 2,000-5,600
Intake Duration at 050 inch Lift 232
Exhaust Duration at 050 inch Lift 236
Duration at 050 inch Lift 232 int./236 exh.
Advertised Intake Duration 288
Advertised Exhaust Duration 294
Advertised Duration 288 int./294 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.510 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.533 in.
Valve Lift with Factory Rocker Arm Ratio 0.510 int./0.533 exh.
Lobe Separation (degrees) 112

Howards Cams
• Manufacturer’s Part # CL110245
• Cam Style Hydraulic Roller
• RPM Range 1800 - 5500
• Intake Valve Lift 0.501
• Exhaust Valve Lift 0.509
• Advertised Intake Duration 280
• Advertised Exhaust Duration 292
• Intake Duration @ .050 224
• Exhaust Duration @ .050 230
• Lobe Separation (degrees) 112

Lunati 60111 LK Voodoo
• Advertised Duration (Int/Exh): 270/278
• Duration @ .050 (Int/Exh): 219/227
• Gross Valve Lift (Int/Exh): .515/.530
• LSA/ICL: 112/106
• Valve Lash (Int/Exh): Hyd/Hyd
• RPM Range: 1800-5800

Lunati 501A4LUN
• Advertised Duration (Int/Exh): 280/288
• Duration @ .050 (Int/Exh): 226/234
• Gross Valve Lift (Int/Exh): .530/.530
• LSA/ICL: 112/106
• Valve Lash (Int/Exh): Hyd/Hyd
• RPM Range: 2000-5800



Last edited by 2005vette; 04-19-2011 at 10:50 AM.
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Old 04-19-2011, 02:06 PM
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These are all going to make the same peak hp and torque. All you will be doing is moving the power band up and down.
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