AVG.RPM's

If I recall correctly RPM @ idle is 650 +/- 100 . But what about say going 65-70 mph? my 83 300D is spinning at about 3k. Is this normal at this speed. It drives fine but just SEEMS like the tach reading should be less. Maybe around 2000 instead.

As far as I know the rear end is stock, does any one know the gear ratio's?
How much power would I lose and how much would the RPM drop with a smaller rear end?
I am just curious, no biggie. as always. thanks. zachariah

[J. R. B.]

IIRC my 83 is about 3000 rpm at 68 to 70 mph depending if I'm going uphill or down. Transmission is probably slipping a little I don't know. Do a search on Easter Egg and you will find some good info.

Your rpm's are normal. The 82-84 300D turbo has a 3.07 final ratio. The 85 turbo was a higher ratio (better mileage) and the non-turbo 300D had lower ratios. If you search, you will find info on swapping ratios.

I'll check it out thanks a bunch

[pawoSD]

I was doing 80-90mph to and from ann arbor saturday, I don't really want to know what mileage I got running at 3.5-4k rpm But since I found a source of diesel around here for a DOLLAR EIGHTY NINE, yes, 1.89, a gallon. I am not too worried about it!

[BodhiBenz1987]

Originally Posted by pawoSD

I found a source of diesel around here for a DOLLAR EIGHTY NINE, yes, 1.89, a gallon. I am not too worried about it!

Are you sure it isn't red?

[Ara T.]

They're actually geared perfectly to what the speed limit was at the time when these cars were new.

[J. R. B.]

Originally Posted by BodhiBenz1987

Are you sure it isn't red?

That's just fuel additive.