1972 Chevelle SS Big Block Chevrolet Engine - VERY SPECIAL

This is the motor! Enough to pull the wheels on an 85 Camaro at the drag track! Video available of it pulling the wheels at launch. Here is the video: https://youtu.be/2CaL3-tfjo8 6.9 s 1/8 mile@103 mph This is a very special 475 cubic inch engine that came out of a 1972 Chevrolet Chevelle SS. Rebuilt matching turbo 400 transmission also available for an additional price. This is not just an rebuilt high performance street engine but a well designed and tested engine developed by a team of engineers, not mechanics in a high performance shop, REAL MECHANICAL ENGINEERS. It was featured in 2 ten page articles in the magazine Popular Hot Rodding in 2005. The engine features ported and flow bench tested LS-6 heads with Crane Pro Gold Roller rockers. ARP's bullet proof head bolts secure the heads to the block. The valve springs were very special beehive springs. The beehive spring gave a 310 % weight reduction over the conventional springs, Further, with 8 lbs less force on the seat and 34 lbs less force over the nose, the Beehive spring delivered over 900 rpm higher that the conventional springs when tested on a Spintron test rig. This allowed a redline of 7000 rpm with 0.600 camshaft lift. The block was sonic tested and it was determined that the bore could be increased to +0.100 inches bring the displacement to 475 cubic inches from 454 cubic inches. Very special hypereutectic pistons were installed. Hypereutectic are aluminum alloy pistons with greater than 12.5 % silicon. This markedly increases hardness of the pistons and markedly decreases expansion of the pistons when they heat up in the engine. Thus, piston to bore clearance was reduced in comparison to forged aluminum pistons by 700%. This results in a large reduction of cold engine wear and blowby past the piston rings. This results in more power, less pollution and better fuel economy!! Compression ratio was set at 13:1. And because of other design choices, this engine will run on just plus gasoline. Premium is not required! For the pushrods, the stock 5/16 inch pushrods were replaced Competition Cams 3/8 inch Magnum replacements. Moroso racing oil pan, double roller timing chain with SFI racing approved chrome harmonic balancer. With support from Edelbrock, Crane Cams, Competition Cams and Holley, the engine performance was optimized for street performance and 1/8 mile runs at the drag track. The cam is a COMP cam Xtreme Energy camshaft Hydraulic Roller Tappet, Advertised Duration 276/282, Lift .510/.510. The engine was dyno tested for 3 months to obtain the optimal configuration and the intake manifold mattered! An Edelbrock Air Gap Performer manifold outperformed a Wieand Team G manifold by 28 hp at 5200 rpm! Final dyno test results for this street motor was 480 hp at 5000 rpm and 560 ft-lbf of torque at 3500 rpm. Perfect street motor in your classic Chevy! Enough to pull the wheels on an 85 Camaro at the drag track! Video available of it pulling the wheels at launch. Here is the video: https://youtu.be/2CaL3-tfjo8