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The Power Adder SBC Short Block is built to handle serious power from turbochargers, blowers, or nitrous—perfect for your next forced induction build. For supercharged applications, we highly recommend the dual 3/16" keyway crank option. The ATI Blower Balancer features both SBC and Chrysler bolt patterns with a thick BBC hub, requiring a matching ATI timing cover and BBC seal. Compression ratios are calculated using 65cc cylinder heads.
Available Configurations:
| Engine | Short Block Specs |
|---|---|
| 383" |
Block: Heavy Duty 4-Bolt Mains, 9.025" Deck, 1-Piece Rear Main Seal, 4.000" Bore Crankshaft: 4340 Forged Steel, Internal/External Balance, 3.800" Stroke Rods: 4340 H-Beam w/ 7/16" Bolts, 5.700" Length Pistons: 2618 Forged Aluminum, Coated Skirts Rings: Plasma-Moly Top, Low Friction Oil, 5/64" x 5/64" x 3/16" |
| 406" |
Block: Heavy Duty 4-Bolt Mains, 9.025" Deck, 1-Piece Rear Main Seal, 4.125" Bore Crankshaft: 4340 Forged Steel, Internal/External Balance, 3.800" Stroke Rods: 4340 H-Beam w/ 7/16" Bolts, 5.700" Length Pistons: 2618 Forged Aluminum, Coated Skirts Rings: Stainless Top, Napier 2nd, Low Friction Oil, 1.2/1.2/3.0mm |
Included Components:
- Camshaft Kit: Includes camshaft, hydraulic roller lifters, roller timing set, thrust plate, dog bones & spring tray — installed
- Sealed-Up Kit: Includes oil pump, welded pick-up, hardened driveshaft, black timing cover & black oil pan — installed
Camshaft Options:
- Extreme: .510”/.521” Lift, 231°/236° @ .050”, 111 LSA
- Eliminator: .544”/.543” Lift, 236°/244° @ .050”, 110 LSA
- Mighty Mouse: .549”/.546” Lift, 242°/250° @ .050”, 110 LSA
Torque Converter Notes: Use a 2,400–2,800 stall converter with the Extreme cam. For the Eliminator cam, a 2,600–3,000 stall converter is required.
Pro Tip: Pair this short block with high-flow aluminum heads and a well-matched fuel system for big boost success. Don't forget to match your converter and cam choice for maximum drivability and performance.