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Old 05-28-2006, 09:54 AM
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1989 MB 300SE RPM's= MPH?

How many RPM's should I have at a cruising speed of 65 MPH in 4th gear (Drive)?
Thanks


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Old 05-28-2006, 10:52 AM
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I know it looks strange but it is normal for the rpm to be high, it's designed that way. I'm at about 3600 rpm at 70 mph.
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Old 05-28-2006, 08:39 PM
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Quote:
Originally Posted by jdc1244
I know it looks strange but it is normal for the rpm to be high, it's designed that way. I'm at about 3600 rpm at 70 mph.
About the same for me--in a 1989 300SE.

Joe B.
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Old 05-28-2006, 11:44 PM
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These engines rev high, 62.5 mph = 3000 rpm.

If you have a lot of noise and vibration, check and/or replace engine and trans mounts, flex discs and driveshaft center bearing.

The car should be smooth and quiet.
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Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.
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Old 05-28-2006, 11:54 PM
carson356
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at 80mph mine is at 4000

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