Here ya go, Kaleb:
603.96x = 148hp @ 4600, 201lb-ft @ 2400 603.970 = 133hp @ 4000, 228lb-ft @ 2000 603.971 = 148hp @ 4000, 229lb-ft @ 2200 Max RPM (+/- 150rpm): 603.96x = 5150rpm 603.970 = 4250rpm 603.971 = 4750rpm For 1987 models with the trap oxidizer, the power dropped to 143hp and 195 lb-ft, at the same rpm's. I tweaked my pump to have the max RPM limit at the upper tolerance (5400 rpm). Nitpickers will note that the older published specs show +/- 150rpm, while later specs from the WIS show +/- 250rpm and a 5400rpm limit. The assorted spec sheets are here: http://www.w124performance.com/docs/mb/OM60X/ :-) -Dave M. > ------------------------------ > Date: Sun, 25 Dec 2005 10:00:30 -0600 > From: "Kaleb C. Striplin" <[EMAIL PROTECTED]> > Subject: [MBZ] 603 HP > > What is the horsepower rating of the various 603's? Im thinking the 3.0 > is 148 but not sure about the 3.5 in the 126 and in the 140.