[Radoye]

itsubishi MK8D Kinsei 54 (Ha 33-54)
14-cylinder air-cooled radial
No fuel injection
1,300 hp (969 kW) take-off,
1,200 hp (895 kW) at 9,842 ft (3000 m)
1,100 hp (820 kW) at 20,340 ft (6200 m)

If this helps...