HPP Engine Buildup Worksheet
Engine Displacement: 463 ci
Bore/Stroke: 4.185/4.210-in
Block/Crank Combo: Super-Duty / SCAT 4340 forged
Bore/Stroke Ratio: 0.994:1
Rod/Stroke Ratio: 1.57:1
Craig removes the rear float...
Craig removes the rear float bowl and metering block. The gaskets are specific for E85 applications so that ethanol doesn’t deteriorate the material. He swaps jets in the E85 carb in search of a few more horsepower.
Block Description: ’73 SD-455
Deck Height: 10.212-in
Crank: SCAT 4340 forged, 4.210-in stroke
Balancer: OEM
Rods: Eagle forged, 6.625-in
Bearings: Clevite
Pistons: SRP forged flattop, 4.185-in
Piston to Deck Height: 0.002-in
Piston Pins: SRP
Method Used to Retain Pins in Pistons: Spiro locks
Rings: Mahle 1⁄16, 1⁄16, 3⁄16-in
Rod Bolts and Head Bolts: ARP
Oiling System
Windage Tray: OEM
Oil Pan: OEM
Oil Pump: Melling
Heads
Casting Number: 16
Head Mods: Super Mod porting
Combustion Chamber Volume: 111 cc’s
Maximum Flow at 28 Inches of Pressure, Int/Exh: . 240-cfm at 0.500-in lift / 190-cfm at 0.500-in lift
Compression Ratio: 8.35:1
Valves: Manley SS 2.11/1.77-in
Angles Used in Valve Job: 30, 45, 65-deg
Rocker Arms: Comp Cams roller, 1.52:1
Pushrods: Comp Cams 5⁄16-in stock length
Cam
Type: Comp Cams hyd. roller
Duration at 0.050: 224/230-deg
Lift: 0.502/0.510-in
Centerline: 107-deg
Lobe Separation Angle: 110-deg
Installed Position: 107-deg
Lifters: Comp Cams hyd. roller
Valvesprings: Comp Cams, dual
Timing Chain: Comp Cams
With more than 35 pulls over...
With more than 35 pulls over our eight-hour test session, the SD-455 didn’t miss a beat.
Carb: Quick Fuel 750-cfm
Intake Manifold: Edelbrock Performer RPM
Ignition
Distributor: MSD
Coil: MSD
Wires: MSD 8mm
Exhaust
Headers, Brand: Hooker
Primary Tube Diameter: 1.875-in SD
Primary Tube Length: 28.00-in
Collector Size: 3.00-in
Gaskets
Brand: Fel-Pro/B.O.P.
Please note the change in fuel consumption is measured by BSFC (lb/HpHr) is the result of the different stoichiometric values of the different fuels. As the stoichiometric value goes lower, more fuel volume is required to support the engine.
Rockett Brand Base Fuel |
| QFT carburetor, 69/79 jets, 32 degrees BTDC |
| Average power from 3,500 to 5,000 rpm is 399.78 hp and 496.29 lb-ft of torque |
| RPM |
TQ |
HP |
BSFC |
| 3,000 |
528.5 |
301.9 |
0.51 |
| 3,100 |
527.7 |
311.5 |
0.48 |
| 3,200 |
527.1 |
321.1 |
0.47 |
| 3,300 |
525.2 |
330.0 |
0.46 |
| 3,400 |
524.1 |
339.3 |
0.47 |
| 3,500 |
523.6 |
349.0 |
0.47 |
| 3,600 |
519.7 |
356.2 |
0.47 |
| 3,700 |
517.8 |
364.8 |
0.47 |
| 3,800 |
515.3 |
372.8 |
0.46 |
| 3,900 |
515.6 |
382.8 |
0.46 |
| 4,000 |
511.5 |
389.6 |
0.47 |
| 4,100 |
509.9 |
398.0 |
0.46 |
| 4,200 |
505.6 |
404.4 |
0.46 |
| 4,300 |
498.1 |
407.8 |
0.47 |
| 4,400 |
491.7 |
411.9 |
0.47 |
| 4,500 |
486.3 |
416.7 |
0.47 |
| 4,600 |
480.9 |
421.1 |
0.47 |
| 4,700 |
475.8 |
425.8 |
0.47 |
| 4,800 |
470.0 |
429.6 |
0.48 |
| 4,900 |
462.0 |
431.1 |
0.48 |
| 5,000 |
456.8 |
434.8 |
0.48 |
| 5,100 |
449.1 |
436.1 |
0.49 |
| 5,200 |
442.2 |
437.8 |
0.49 |
| 5,300 |
433.6 |
437.6 |
0.50 |
Rockett Brand E10 |
| QFT carburetor 72/81 jets, 30 degrees BTDC |
| Average power from 3,500 to 5,000 rpm is 400.51 hp and 497.18 lb-ft of torque |
| RPM |
TQ |
HP |
BSFC |
| 3,000 |
528.1 |
301.6 |
0.49 |
| 3,100 |
528.0 |
311.6 |
0.48 |
| 3,200 |
527.1 |
321.3 |
0.48 |
| 3,300 |
527.2 |
331.3 |
0.47 |
| 3,400 |
526.3 |
340.7 |
0.47 |
| 3,500 |
523.0 |
348.5 |
0.47 |
| 3,600 |
521.7 |
357.6 |
0.48 |
| 3,700 |
518.0 |
364.9 |
0.49 |
| 3,800 |
517.3 |
374.3 |
0.48 |
| 3,900 |
515.5 |
382.8 |
0.47 |
| 4,000 |
513.2 |
390.9 |
0.47 |
| 4,100 |
509.9 |
398.0 |
0.47 |
| 4,200 |
505.9 |
404.6 |
0.47 |
| 4,300 |
499.6 |
409.0 |
0.48 |
| 4,400 |
493.2 |
413.2 |
0.49 |
| 4,500 |
487.8 |
417.9 |
0.49 |
| 4,600 |
481.2 |
421.5 |
0.49 |
| 4,700 |
476.7 |
426.6 |
0.49 |
| 4,800 |
471.1 |
430.5 |
0.48 |
| 4,900 |
463.0 |
431.9 |
0.49 |
| 5,000 |
457.8 |
435.8 |
0.48 |
| 5,100 |
451.1 |
438.0 |
0.49 |
| 5,200 |
451.1 |
438.2 |
0.50 |
| 5,300 |
434.4 |
438.4 |
0.51 |