HPP Engine Buildup Worksheet
Engine Displacement: 467 ci
Bore/Stroke: 4.185 / 4.250-in
Bore/Stroke ratio: 0.98:1
Rod/Stroke ratio: 1.6:1
Bottom End
Block: Stock ’75 455
Deck height: 10.205-in
Crank: Butler/Eagle forged
Balancer: Summit Street/Strip, steel, elastomer, 6.610-in, SFI 18.1
Rods: Eagle forged H-beam, 6.800-in
Bearings: Clevite, plain shell, tri-metal
Pistons: Butler/Ross forged flat-top with valve reliefs
Piston-to-deck height: 0.010-in below
Piston pins: Ross, 0.990-in floating, 0.155-in wall
Method used to retain pins in pistons: Spiro Locks
Rings: Total Seal, moly top, ductile second, 3-piece oil, 1⁄16, 1⁄16, 3⁄16-in
Rod bolts and head bolts: ARP
Balancing specs: Internal
Oiling System
Windage tray: Canton in pan
Crank scraper: Canton in pan
Oil pan: Canton Racing Road Race Series 5-quart, wet-sump
Oil pump: Melling M54DS high-volume
Heads
Casting number: 6X
Combustion chamber volume: 96.2 ccs
Maximum flow at 28 inches of pressure
| Lift | Intake Flow CFM | Exhaust Flow CFM |
| 0.100 | 66 | 55 |
| 0.200 | 133 | 106 |
| 0.300 | 191 | 149 |
| 0.400 | 224 | 170 |
| 0.500 | 236 | 182 |
| 0.600 | 250 | 186 |
Compression ratio: 9.1:1
Valves: Manley SS 2.11/1.77-in
Angles used in valve job
Intake: 45, 60, 75, and 82-deg, 82 is hand-blended into 75-deg.
Exhaust: 45-deg, 12mm radius
Retainers: Comp Cams, steel, 10-deg Beehive
Keepers: Comp Cams 10-degee, 11⁄32-in
Valve Guides: K-line bronze liner
Valve Seals: Steel/Viton
Rocker Studs: ARP 7⁄16-in
Rocker Arms: Comp Cams aluminum full roller, 1.65:1
Pushrods: Manley 3/8x8.900-in
Cam
Brand: Comp Cams Xtreme Energy hydraulic roller
Duration At 0.050: 224/230-deg
Lift: 0.552/0.561-in
Centerline: 106-deg
Lobe Separation Angle: 110-deg
Installed Position: 106-deg
Lifters: Comp Cams roller
Valvesprings: Comp Cams Beehive
Seat Pressure: 137-lb/in
Open Pressure: 290-lb/in
Timing Chain: Cloyes double roller
Induction
Carb: Quick Fuel Technology 750-cfm, set up for blow-through supercharger
Intake Manifold: Edelbrock Torker II
Supercharger: . . Gear Head Designs Paxton Novi 1500
Ignition
Distributor: MSD Pro-Billet Ready-to-Run
Wires: MSD 8.5 mm
Exhaust
Headers: Hooker
Primary Tube Diameter: 1.75-in
Primary Tube Length: 32-in
Collector Size: 3.00-in
[Corrected Horsepower] 18. The red line represents a normally aspirated pull on 92-octane from our previous oil test. Blue is the baseline with the supercharger, 4.00-inch pulley, 92-octane, and no methanol injection; green is the 4.00-inch pulley, 92-octane, with methanol injection; aqua is the 3.25-inch pulley, 100-octane fuel, and methanol injection.
[Corrected Torque] 18. The red line represents a normally aspirated pull on 92-octane from our previous oil test. Blue is the baseline with the supercharger, 4.00-inch pulley, 92-octane, and no methanol injection; green is the 4.00-inch pulley, 92-octane, with methanol injection; aqua is the 3.25-inch pulley, 100-octane fuel, and methanol injection.