I have no idea how many passes the motor has on it, but the rods have been in the motor since about 1996. Dad made about 30 passes a year and I maybe make 50 since I got it in 2005. The car has run a best of 11.28,366 cubes, 11.8:1,and I turn it 7200. I think it's a ticking time bomb, but it hasnt blown up yet? I'm hoping it will last a little while longer so I until I can get a new motor built.