ATK HP Marine Crate Engine Big Block Chevy 502ci / 515HP / 570TQ
In 2007 ATK launched a High Performance Division with one of the finest engine shops in the country. By reverse engineering all of their engines, they are able to eliminate any OEM deficiencies. This makes an ATK built crate engine have a superior design over the original engine by incorporating better components when needed. These quality built engines are offered in three different stages for ease of finishing an engine swap. ATK HP engines feature a 18 month/unlimited hour warranty.
This is a replacement engine for a Mercruiser 450hp 502ci marine engine.
- Horsepower: 515 hp
- Torque: 570 lb/ft
- Dart Big M 4-bolt main 1-piece rear main seal
- Bore/Stroke: 4.470" x 4.000"
- Displacement: 502ci
- Crankshaft: Scat nodular iron
- Balance: External
- Rods: Scat 4340 I Beam 6.385" with ARP 8740 bolts
- Compression Ratio: 8.9:1
- Pistons: Forged
- Rings: Moly
- Camshaft: Hydraulic roller
- Cam Duration @ .050": Intake 224 / Exhaust 224
- Cam Lift: Intake .483" / Exhaust .483"
- Lobe Separation Angle: 112lsa
- Timing Chain: Single roller
Cylinder Head Information:
- Cylinder Heads: Dart Iron Eagle
- Combustion Chamber: 119cc
- Intake Runner: 308cc
- Valve Size: 2.250" Intake / 1.880" Exhaust
- Rocker Arms: Stamped steel 1.7 ratio
- Short Block
- Timing Set
- Cylinder Heads
ATK Engines High Performance Marine Crate Engine Big Block Chevy 502ci / 515HP / 570TQ
High Performance Marine Crate Engine