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
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
Valveguides: 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: 130 psi
Open Pressure: 275 psi
Timing Chain: Cloyes double roller

Induction

Carb: Holley 750-cfm HP
Intake Manifold: Edelbrock Torker II

Ignition

Distributor: MSD Pro-Billet Ready-to-Run
Wires: MSD 8.5mm

Exhaust

Headers: Hooker
Primary Tube Diameter: 1.75-in
Primary Tube Length: 32-in
Collector Size: 3.00-in

Gaskets

Brand: Fel-Pro

Parts Sources

Engine Components: Summit Racing Equipment
Reciprocating Assembly: Butler Performance, www.butlerperformance.com

Dyno results

Ported 6X Heads
32-degrees total timing and #79
jets, square

RPM TQ HP BSFC
3300 544.0 341.8 0.40
3400 547.6 354.5 0.40
3500 550.5 366.8 0.39
3600 550.0 377.0 0.38
3700 548.5 386.4 0.39
3800 547.4 396.1 0.39
3900 546.4 405.7 0.39
4000 545.8 415.7 0.38
4100 547.0 427.0 0.40
4200 547.3 437.7 0.38
4300 545.9 447.0 0.38
4400 545.0 456.6 0.39
4500 544.0 466.1 0.39
4600 539.1 472.1 0.40
4700 536.8 480.4 0.41
4800 531.7 485.9 0.41
4900 523.0 488.0 0.43
5000 514.8 490.1 0.43
5100 507.3 492.6 0.43
5200 496.2 491.3 0.44
5300 482.5 486.9 0.44

Edelbrock D-port Heads
34 degrees total timing and #79
jets, square

RPM: TQ: HP: BSFC
3300 566.7 356.1 0.38
3400 569.5 368.7 0.38
3500 570.7 380.4 0.38
3600 569.3 390.3 0.38
3700 566.9 399.4 0.38
3800 565.1 408.8 0.39
3900 564.2 418.9 0.39
4000 563.4 429.1 0.39
4100 562.9 439.4 0.39
4200 563.3 450.5 0.40
4300 563.2 461.1 0.37
4400 563.3 471.9 0.36
4500 559.7 479.6 0.37
4600 556.7 487.6 0.37
4700 554.1 495.8 0.38
4800 547.3 500.2 0.38
4900 538.5 502.4 0.40
5000 528.1 502.8 0.41
5100 506.2 491.5 0.44
5200 491.2 486.4 0.45
5300 487.2 491.7 0.45

SOURCE
RaceKrafters Automotive Machine
1140 Dillerville Rd.
Lancaster
PA  17601
717-399-8780
www.racekrafters.com
Edelbrock LLC
Torrance
CA
310-781-2222
800-416-8628
http://www.edelbrock.com
Summit Racing Equipment
PO Box 909
Akron
OH  44398
800-230-3030
330-630-0240
www.summitracing.com
Comp Cams
3406 Democrat Rd
Memphis
TN  38118
800-999-0853
www.compcams.com