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474ci Engine Build - Pump-Gas Poncho Power
| Engine Buildup Worksheet | | Engine | | Engine Displacement | 473.5 ci | | Peak Horsepower | 578 at 5,500 rpm | | Peak Torque | 588 lb-ft at 4,700 rpm | | Bore/Stroke | 4.212x4.25-in | | Bore/Stroke Ratio | 0.991:1 | | Rod/Stroke Ratio | 1.60:1 |
| Bottom End | | Block Description | YC-code No. 485428 | | Year | ’71 | | Block Preparation | Bored 0.060-in | | Deck Height | Zero | | Crankshaft | Butler Performance, forged-steel, 4.25-in stroke, 3.25-in main journal, 2.20-in rod journal | | Crank Preparation | Normal | | Main Caps | Pro-Gram Engineering, No. PRO-P455F front, No. PRO-P455C center three, No. PRO-P455R rear | | Main Bearing Clearance | 0.003 in | | Balancer | Performance Street Balancer No. PBO-PB1056ST | | Rods | Eagle Specialty Products, forged-steel, H-beam, 6.800-in length, 7/16-in ARP bolts | | Bearings | Federal Mogul No. 151M-STD main journal, Federal Mogul 8-7200CH-STD rod journal | | Piston | Ross custom, forged-aluminum, 4.211-in diameter, flat-top, 439.5 grams, 8.5cc reliefs | | Piston to Deck Height | Zero | | Piston Pins | Ferrea No. P70028-8, forged-alloy, 0.990-in diameter, 138 grams | | Piston Rings | Total Seal No. CR3455-65, plasma-moly, file-fit, 0.018-in gap | | Fasteners | ARP 194-5601 four-bolt main-stud kit | | Balanced | Yes |
| Oiling System | | Windage Tray | No | | Crank Scraper | No | | Oil Pan | Canton No. 15-450, road-race | | Oil Pump | Melling M54F | | Oil | Shell Rotella 30W |
| Heads | | Casting Number | Edelbrock No. 60569-2 | | Chamber | Open, hand-smoothed | | Combustion Chamber Volume | 90 cc’s | | Compression Ratio | 9.95:1 | | Head Mods | Fully ported intake and exhaust ports | | Intake Port Volume | Approx. 220 cc’s | | Intake/Exhaust Flow Ratio | 75 percent | | Intake/Exhaust Flow at 28-in: | | | 0.200 | 140/86 cfm | | 0.300 | 201/173 cfm | | 0.400 | 258/199 cfm | | 0.500 | 292/217 cfm | | 0.600 | 312/230 cfm | | 0.700 | 316/236 cfm | | Intake Valve | Ferrea No. 5073, stainless steel, 2.11-in, 5.100-in length | | Exhaust Valve | Ferrea No. 5144, stainless steel, 1.77-in, 5.100-in length | | Angles | Multi-angle with 45-deg seats | | Retainers | Comp Cams No. 740-16, 10 deg | | Locks | Comp Cams No. 611-16, 10 deg | | Valvesprings | Lunati No. 73100-16 | | Install Height | 1.79 in | | Seat Pressure | 137 psi | | Open Pressure | 338 psi | | Valveguides | Bronze, 0.530-in diameter | | Valve Seals | Viton | | Rocker Studs | ARP No. 100-7101, 7/16-in | | Rocker Arms | Comp Cams No. 19060, full roller | | Rocker Ratio | 1.5:1 | | Pushrods | Butler Performance No. SBR-581-R-16, 5/16-in diameter, 8.80-in length, chrome-moly | | Fasteners | ARP No. 190-3605 head-bolt kit |
Pontiac Solstice Research
Get updated on all your car buying needs from safety features, to specs, to crash test ratings and options. Get all the information you need if you are interested in buying a new car like the Pontiac Solstice. The L4 standard engine in the Solstice gives you 173 horsepower with an estimated 22 mpg. It has a comparable trade in value which should come in handy when you go to shop for your next car. The Pontiac Torrent and the Pontiac G6 are other vehicles that might interest you.
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