The turbo on my Nuffield that I fitted from an old Rover Montego car in 2013 was shot so it has been re cored with a TB0253 as used in Volvo 440,460, Reno 5 and many other vehicles. The first video shows the tractor at 2000 revs , 9.4 lbs boost and indicated 58hp, as the dyno is calibrated at 1400 revs this equates to around 85hp. The second clip is at 1400 revs and showing 67hp. A normal Nuffield produces about 43hp at 1400 revs!