98cummins specs

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Cam Olfert - 30 May 2007 14:59 GMT

Can anyone tell me the peak power and economy RPM points for a 98 12 valve
Cummins? I have a feeling the best mileage happens around 1100, but would
like to get some more input.

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Roy - 30 May 2007 15:10 GMT

> Can anyone tell me the peak power and economy RPM points for a 98 12 valve
> Cummins? I have a feeling the best mileage happens around 1100, but would
> like to get some more input.

I maybe wrong but I thought it was 2200. Been a bit since I owned my 12v.

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Tom Lawrence - 30 May 2007 15:30 GMT

> Can anyone tell me the peak power and economy RPM points for a 98 12 valve
> Cummins? I have a feeling the best mileage happens around 1100, but would
> like to get some more input.

Fuel economy is usually best just above an engine's torque peak. In the
case of the 12V Cummins, that's around 1700-1800RPM (with peak torque
occurring at 1600RPM).

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