1983 300SD

Recently I have been toying with the idea of not putting shifter to D untill my car reaches 45-50 MPH. This is mostly slow driving situations, around town, or when going up hills at a speeds less than 50MPH which I do allot due to where I live.

Where I live I have to go up allot of long fairly steep hills and the car definitely goes allot faster in S compared to D when I climb these hills with the fuel pedal in the exact same position.

It amazed me when I first saw the car do this time and time again.

The reason I THINK this happens is because the engine if running in a better power band for effeciently.

I was sort of surprised of this but it happens. Try it.

As you would expect the turbo speeds up as the engine starts to burn the fuel more effeciently.

I was wondering if anybody else has noticed this or am I over looking something or misinterpretting this.

This cars shifting bushings have been rebuilt since I purchased the car so I'm thinking the previous owner my have been doing it also.

These engines don't seem to run very effeciently when the engine speed is below 2500 RPM, give or take.

Do any of you turbo owners do this on a regular basis?

Thanks.

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1982 300SD