Without a turbo they are a little sluggish but for what they were sold against then they were far better than a 6.2/6.5 Chevy and the first 5.9 cummalongs weren't no power houses either, they were only 145 hp. With the turbo on it, it's 250 hp 545 Lbs of torque, considerably better than anything in the 80s and early 90s even
1992 F350 crew with the 460 for me. 8 miles to the gallon full or empty, pull a house down though! Love the OBS, so does the misses, she's always in it when I need it... !