SOLID ROLLER LIFTERS ON HYDRAULIC ROLLER CAM
I have a ’69 Chevelle with a 454, Air Flow Research 305 heads, a Weiand Stealth intake, a Holley 950 HP carb, a five-speed, and 3.90:1 gears. The current cam is a Comp custom—245/252 degrees at 0.050, 0.650/0.650-inch valve lift, 110-degree lobe-separation angle (LSA)—that will pull 6,600-plus, which I know is pretty good for a hydraulic roller (HR) cam. I attribute this to the 175/450-pound valvespring pressure, titanium retainers, good Crane lifters, and roller rockers. Before shelling out about $1,200 for a new cam kit and a weekend, I’d like to know what I’m giving up in power with this cam due to valvetrain stability issues that are commonplace with HR cams, including valve bounce and/or lifter bleed-down. A lot of boat guys…