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  #1  
Old 06-06-2009, 07:30 PM
babymog's Avatar
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603.97x pump on a 603.96x engine, settings?

I know that the RPM will have to be turned up to 3.0L specs, does anybody know how that is done? What is full-load RPM and max. RPM (stock) of the 603.96 engine?

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Old 06-07-2009, 01:36 AM
auspumpen's Avatar
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You need to determine which .97 IP you have

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
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603.97x pump on a 603.96x engine, settings?-ip-adjustments.jpg  
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Old 06-08-2009, 08:07 PM
babymog's Avatar
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Thanks, looks like I need to increase about 900rpm to get to the normal 3.0L upper limit (.970 pump).

Looking at the disparity between the HP@rpm on the .970 vs .971, and knowing that the throttling zone of the internal/centrifugal governor can reduce max. fuel available at lower RPM, I wonder if the difference between the .970 and .971 is simply the governor setting. It is unrealistic IMO to expect this style of governor to allow full-fuel at 4000rpm and limit no-load rpm to 4250. I had made this change to a Cat 3208 and picked up significant power at the full-load setting (although it made the no-load rpm a bit high).

Again, thanks.

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