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21st Century Tri-Power 507 HorsePower Engine - Pontiac Tech
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With the engine not revving... With the engine not revving past 4,000 rpm on the initial pulls, Bryan and Dave Weber pull off a valve cover to see if there's a valvetrain issue. It was later determined to be carburetion. The SixShooter system went back to Barry Grant for correction; the company refurbished it and sent it back. | HIGH PERFORMANCE PONTIAC ENGINE BUILDUP WORKSHEET | | Engine Displacement | 449 ci | | Horsepower | 507.6 at 5,700 rpm | | Torque | 528.3 at 4,400 rpm | | Bore/Stroke | 4.10x4.25-in | | Block/Crank Combo | '64 Pontiac blockwith Eagle cast crank | | Bore/Stroke Ratio | 0.9641 | | Rod/Stroke Ratio | 1.61 | | BOTTOM END | | Block Description | '64, 78X GTOtwo-bolt main | | Preparation | Cleaned, derusted,degreased, bored 0.040-in, | | CNC square deck, align-honed, | deburred, installed new freeze plugsand cam bearings | | Deck Height | 10.222-in | | Crank | Eagle cast-steel, 4.25-in stroke | | Balancer | Replacement factory GM | | Rods | Eagle forged H-beam,6.800-in long | | Bearings | Federal Mogul | | Pistons | Wiseco custom-forged,16cc dish | | Piston Compression Height | 1.295-in | | Piston-to-Deck Height | -0- | | Piston Pins | Wiseco 0.990-in diameter | | Piston Pins Retention | Wiseco Spiraloxretainer clips | | Rings | Sealed Power plasma-moly 1/16,1/16, 3/16-inch, file-to-fit | | Rod Bolts | Eagle | | Balancing Specs | Internally balanced byWeber Racing Equipment | | OILING SYSTEM | | Windage Tray | Milodon | | Oil Pan | Milodon | | Oil Pump | Sealed Power high volume |
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