Description
Valve springs: VSH3 install 100-115 lbs closed stay below 300 lbs open
Basic RPM Range: 1800-5500
Intake Valve Lift with OE Rocker Ratio (1.50): .466
Exhaust Valve Lift OE Rocker Ratio (1.50): .487
Intake Valve Lift with 1.60 Rocker Ratio: .497″
Exhaust Valve Lift with 1.60 Rocker Ratio: .519”
Intake Valve Lift with 1.65 Rocker Ratio: .513
Exhaust Valve Lift with 1.65 Rocker Ratio: .536
Lobe Separation Angle: 114 Degrees
Intake Centerline: 109 Degrees
Valve Adjustment: Zero Lash Plus ½ Turn
Best for 455 and larger engines
Install cam straight up – degree with 109 intake centerline
Ok to install 2 ° advance for lower power range
Cam has noticeable lope, but good idle, decent vacuum and excellent low end torque.
Works on high and low compression
(9:1 or higher for 400 engines – 8.5:1 and higher 421/428/455 and stroker engines)
ok for AC and power brake cars.
Buy from a Pontiac engine builder!
Bid in confidence – I’ve been building Pontiac’s and supplying parts since 1979
US made!
high quality lifters made by Eaton
Cam int – INT .311 EXH .325
Lift 1.5 – INT .466 EXH .487
Advdur Int – INT 298° EXH 303°
.050 dur Int – INT 224° EXH 234°
Open Int – INT 3°BTC, 56°BBC
Close Int – INT 41°ABC, EXH -2°ATC
Overlap – INT 1° EXH —
Lash Int – INT HYD
Cntr Int – INT 109° EXH 119°
Lobe sep – INT 114
