ATK High Performance Chevy 383 Stroker 470 HP Mid-Dress Long Block Crate Engines HP101M

ATK High Performance Chevy 383 Stroker 470 HP Mid-Dress Long Block Crate Engines HP101M

Horsepower
470 hp at 5,200 rpm

Torque
490 lb.-ft. at 4,800 rpm

Block
Seasoned GM 4-bolt main with one-piece seal and passenger side dipstick

Crankshaft
Scat nodular iron

Connecting Rods
Scat 4340 Forged I-beam with ARP 8740 bolts

Pistons
Forged

Piston Rings
Moly rings

Compression Ratio
10:1

Camshaft
Hydraulic roller

Camshaft Specifications
224/236 duration at .050 and .591in/.591ex lift with 108° lobe separation

Cylinder Heads
Dart SHP aluminum 72 cc chamber with 2.02 in. intake and 1.60 in. exhaust valves

Rocker Arms
Billet 1.6 ratio aluminum roller rockers

Oil Pan
Original-style 5-quart pan

Oil Type
10W30

Recommended Plug Gap
0.035 in.

Water Pump
Designed to use a long water pump

Fuel Type
Dyno testing was done using 91 octane fuel

Torque Converter
2,500 rpm+ recommended for best results

Vacuum Note
Engine will not produce enough vacuum for power brakes