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Old 06-26-2005, 01:28 PM
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DieselBone DieselBone is offline
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Join Date: Dec 2004
Location: Mechanicsburg, Pennsylvania
Posts: 355
Quote:
Originally Posted by wsalopek
Is this the math for the rpm change?:

2.65/2.88 x given rpm = new rpm?

So:

.92 x 3400rpm (at 80mph) = 3128 ?

While that change would be welcome, I'm looking for a lot more than that...I'd like to get down to maybe 2500 rpm at 80 mph.

I don't know much about these things, but my 300DT revs seem high for 80mph...esp for a large car which typically is designed to loaf...seems to me, just intuitiuvely, that the rear end would be higher than 2.88.

What about the 2.47 that I've read about? Is that available for my car? That would potentially give me 2915...hmmm...nuts...again, welcome, but not the change I'd like to see.

Thanks...

I don't think you'll ever be able to get those RPM's down to that, even with a 5 speed. Our 300TD's (as well as 300D's) weren't made for that type of operation. I think if you get 2915 out of it, you'll be happy. Its just you can't lung these cars down, they're made for that "high" speed operation, just ask anyone. BTW, what condition is your hood-pad in?????
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1969 220D 4 speed (parts car)
1976 280C
1976 280S
1981 240D 4 speed (parts car)
1982 300D
1983 300TD (Ivory)
1983 300TD (gold)
1985 300TD (gray)
1987 190D 2.5
1970 280SEL (sold)
1977 240D 4 speed (sold)
1974 280 (rusted to death)
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1927 Chevy 4 door sedan
1938 Chevy 2 door sedan
1950 Willys Jeepster
1955 Studebaker President 4 door
1977 Ford F250
1979 Glastron 17'
1948 John Deere A
1960 John Deere 2010
1979 Satoh S650G
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