With nearly 2 tons to move, Les Hays wanted to make certain that he would not have a power problem. So he assembled his own 588-inch big-block that converts pump gas into over 800 happy horses. Les's engine develops huge power by flowing lots of air through a set of Air Flow Research cylinder heads that flow 385 cfm measured at 0.600-inch lift. The bumpstick is a very big solid roller. We had a chance to hear the thunder of this motor and can attest that it is awesome.





Les Hays
'56 Chevy

Specs

Displacement - 588 ci
Block - Merlin block w/splayed billet caps
Bore x Stroke - 4.560 x 4.500 inches
Compression - 10.25:1
Rod - 6.700-inch, Scat

Induction

Carburetor - Holley Dominator 1,050-cfm
Intake - Edelbrock 454R

Camshaft Specs

Comp Cams solid roller

Valve lift - 0.714/0.714 inch
Duration - @ 0.050 266/272
Lobe separation - 112

Cylinder heads

AFR aluminum 335, CNC-ported

Valve size - 2.30/1.88-inch
Rockers - Jesel Sportsman, 1.7:1

Drivetrain

Transmission - TH400, Remac Transmission
Converter - Continental 9-inch
Rearend - 9-inch Bill Thomas Enterprises, Detroit Locker, Strange 33-spline axles
Gears -4.56:1

Rear rubber

33x21.50 Mickey Thompson Sportsman Pro

Numbers

Peak Horsepower - 837 @ 6,500 rpm
Peak Torque - 773 @ 4,900 rpm