406" Long Block

Utilizing a big bore engine block and a medium stroke forged crankshaft, this engine loves to rev! Using only top of the line components like a fully forged rotating assembly, hydraulic roller camshaft and aluminum heads, the 406" Long Block is the engine your car needs. Check out our custom options and packages below to find your perfect combination!

Block: Smeding Heavy Duty 4 Bolt Mains, 9.025" Deck Height, 1 Piece Seal, 4.125" Bore
Crankshaft: Smeding 4340 Forged Steel, Internal/External Balance, 3.800" Stroke
Rods: Smeding 5140 Forged Steel I-Beam with 3/8" Bolts, 5.700" Length
Pistons: JE Forged Aluminum, Reverse Dome, 10.0:1 Compression
Rings: Stainless Steel Top, Napier 2nd, Low Friction Oil, 1.2/1.2/3.0
Rocker Arms: Smeding 1.5 Ratio, Full-Roller 
Cylinder Heads: Smeding Aluminum, 180 or 195cc Intake Port, 2.02”/1.60” Valves, 65cc Chambers
Warranty: 3 Year, Unlimited Miles

Cam Specs:
440hp: .495”/.502” Lift, 220°/224° Duration @ .050”, 112 LSA
500hp: .510”/.521” Lift, 231°/236° Duration @ .050”, 111 LSA
540hp: .544”/.543” Lift, 236°/244° Duration @ .050”, 110 LSA
550hp: .549”/.546” Lift, 242°/250° Duration @ .050”, 110 LSA

Torque Converter: 1,800-2,000rpm Stall w/ 440hp Cam, 2,000-2,400 Stall w/ 500hp Cam, 2,400-2,600 Stall w/ 540hp Cam & 2,600-3,000 Stall w/ 550hp Cam Recommended

Final assembly & tuning of this partial engine must be completed by an experienced engine assembler/builder. Smeding Performance is not responsible for damaged caused by user installed parts.