HPP Engine Buildup Worksheet
| Engine Displacement |
505 CID |
| Engine Dyno Horsepower |
920 pump gas, 1,073 racing fuel |
| Torque |
829 pump gas, 1,079 racing fuel |
| Bore/Stroke |
4.350x4.250-in |
| Bore/Stroke ratio |
1.02:1 |
| Rod/Stroke ratio |
1.57:1 |
| BOTTOM END |
| Block description |
IA II |
| Deck Height |
10.220-in |
| Crank |
Forged 4.250-in stroke with 3.00-in mains from Butler Performance |
| Preparation |
Balanced by Wheeler |
| Balancer |
ATI |
| Rods |
Scat 4340-forged steel, 6.700-in |
| Bearings |
Sealed Power |
| Pistons |
Ross forged, 49cc dish |
| Piston-to-deck height |
0 |
| Piston pins |
Ferrea (big-block Chevy style) full-floating |
| Rings |
Total Seal, file-to-fit |
| Fasteners |
ARP |
| OILING SYSTEM |
| Windage tray |
Milodon |
| Oil pan |
Milodon |
| Oil pump |
Melling high volume |
| HEADS |
Casting Edelbrock Performer, ported
Combustion chamber volume 90 cc’s
Maximum flow at 28 inches of water |
| Intake |
304 cfm at 0.600-in lift |
| Exhaust |
232 cfm at 0.600-in lift |
| Compression Ratio |
7.96:1 |
| Valves |
Edelbrock SS, 2.11/1.66-in |
Angles used in valve job 30, 45, 75-deg
Rocker arms Comp Cams aluminum roller, 1.5:1 |
| Pushrods |
Smith Bros. restrictor- type 0.040, 3/8-in |
| CAM |
| Brand |
Comp Cams hyd. roller |
| Duration at 0.050 |
258/248-deg |
| Lift |
0.541/0.541-in |
| Centerline |
111-deg |
| Lobe separation angle |
115-deg |
| Installed position |
Straight up |
| Lifters brand |
Comp Cams roller |
| Valvesprings |
Edelbrock |
| Seat pressure |
140 lb |
| Open pressure |
360 lb |
| Timing chain |
Cloyes Tru-roller |
| INDUCTION |
| Type |
FAST EFI, MAP 3-bar, sequential |
| Throttle Body |
70mm Accufab |
| Fuel injectors |
FAST 83-lb/hr |
| Computer (ECM) |
FAST |
| FUEL SYSTEM |
| Fuel pump |
FAST electric |
| Intake manifold |
Edelbrock Victor Pontiac, port matched |
| POWER ADDER |
Turbocharger 2 - 70mm Turbonetics,
pair of 35mm Evolution Wastegates, mechanical |
| Down pipes |
3 in |
| Max boost |
Tested to 21 lbs |
| Intercooler |
Bell air-to-air 2.5-in |
| Blow-off valve Turbonetics Godzilla |
| IGNITION |
| Distributor |
MSD Crank trigger |
| |
modified for cam sync |
| Amplifier |
MSD |
| Coil |
MSD Pro Power |
| Wires |
Moroso suppression 8mm |
| EXHAUST |
| Headers |
Full custom stainless steel |
| |
fabricated by MCR |
| Primaries |
2-in |
| Collectors |
3-in |