BMW e30 turbo dyno with aluminium block m52b28: 490 hp

Few dyno pulls with my e30 m52b28 turbo. In first pull it gave 490 hp @ 1 bar but the RPM information was wrong, so we didn’t get real torque numbers. In second pull the RPM was correct, but it was lacking power. That was caused by trigger wheel almost falling off. But looking about the results, it looks like the first pull gave about 600 nm Engine specs: - m52b28 (from e36 328ia) - Aluminum cylinder block - m50 connecting rods - Athena cooper ring head gasket - Upgraded VANOS - e34 m50 oil pan, suction