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.

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