Cylinder Heads
Blueprinting isn't just a bottom-end dynamic. It applies to every aspect of an engine build from top to bottom. What's more, no matter why you're building an engine, including a oncours-original restoration, blue-printing is good common sense. McAfee's blueprinting regiment includes taking the ragged edges off everything, even valvesprings. Each valvespring is massaged to remove rough edges that cause internal friction and power loss. Internal friction is one of the leading causes of excessive heat and power loss. Each source of friction, no matter how small, makes heat and robs power. Add up these sources and the losses mount.
Inner and outer valvesprings...
Inner and outer valvesprings are massaged to remove rough edges, then coated with 321 dry lubricant to reduce internal friction. When you add up 16 inner and 16 outer valvesprings, frictional losses become enormous.
Valve-seat contact is crucial...
Valve-seat contact is crucial to seating as well as cooling. The more seat contact, the cooler valves run because there's more contact area to transfer heat from the valve to the water jacket. The downside is reduced flow. Seat contact is more critical at the exhaust valve.
McAfee wants solid stability...
McAfee wants solid stability at high rpm, which is why he opted for a Comp Cams CCA-4013 stud girdle. These are Comp Cams Pro Magnum 1.7:1 roller rockers with needle-bearing fulcrums. This stuff doesn't come cheap, but it sure beats engine failure due to stinginess.
McAfee opted for an MSD-8479...
McAfee opted for an MSD-8479 billet distributor, custom ignition wires, and a Blaster coil to light the mixture. Because he has been building engines for most of his 73 years, he leaves nothing to chance when it comes to ignition.
MCE Engines never installs...
MCE Engines never installs a distributor right out of the box. They need proper curving, and the distributor gear must be positioned 4.031- 4.038 inches from the bottom of mounting flange to the bottom of the gear. McAfee has this simple go/no-go gauge that guarantees perfect fit.
This is a Holley HOL-0-12-289-11...
This is a Holley HOL-0-12-289-11 fuel pump, which delivers 110 gph at up to 8 psi under the most demanding conditions.
McAfee trusts his fuel systems...
McAfee trusts his fuel systems to Holley, which has been designing and building quality fuel systems for more than a century. This is Holley's 870-cfm (PN HOL-0-80870) Avenger four-hole atomizer with vacuum secondaries. It has been blueprinted by Benton Jackson, MCE's fuel system specialist. Jet sizes are written on the fuel bowls. When we get this on the dyno, Benton will do a pinpoint carb tune.
MCE Engines demonstrates options...
MCE Engines demonstrates options we haven't always considered before. McAfee dimples the end rails for gasket security. You can also run a large bead of high-temp RTV along the end rails, which also provides excellent sealing. Check out the screw-in oil galley plug atop the block.
McAfee decided to go with...
McAfee decided to go with this Milodon road-race pan to ensure oil concentration around the pick-up under all driving conditions. And yes, it has been blueprinted to MCE specs. All doors work freely, with all ragged edges and imperfections removed. McAfee always installs road-race pans with the engine right side up. This keeps the doors where they belong. If you install a road-race pan upside down, you risk having the door hang up in the open position against the pickup, which is where it will stay causing oil starvation in turns.
Cam Selection Help From Comp Cams
Did you know cam selection is easier than ever with Cam Quest 6 software from Comp Cams? Cam Quest 6 is the fastest path to power because it's never further away than your computer. It enables you to dial in both horsepower and torque, as well as when each happens. For more informa- tion, visit www.compcams.com.