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#1
10-02-2006, 04:11 AM
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How many RPMs do you get at 75mph?
Just wondering, taking a survey.
My 1984 300 SD TD gets to 3500rpms at 75 mph. It has little hesitation to get to 75 mph after I changed the fuel filter. There is no shaking, no tremors at this speed. Pedal is 2/3 way down. I think that I got a good deal on this one, good engine! Is 3500 rpms considered high or normal? What do you guys get at 75 mph? Which model/year do you have? Frankie
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Frankie  It never ends! 1985 300D Turbo 181K Anthracite grey, "SOPHIA" 1984 300 SD Turbo(sold) 2004 Subaru Forester XT,Cayenne red. 
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#2
10-02-2006, 04:30 AM
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On my '85 300TD (wagon) I get the same RPM or slightly less at the same speed. Its very smooth over all.
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JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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#3
10-02-2006, 06:06 AM
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70mph for me is about 3000 (or 2950)... 2.88:1 gear with 205/70R14
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I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#4
10-02-2006, 07:37 AM
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OK, this is reassuring. So does this mean that the RPMs we are getting at 70-75 mph is normal or high? OR is it a preference thing that owners get their mechanics to adjust to their liking?
I sense that my rpms is within normal. Frankie
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Frankie It never ends! 1985 300D Turbo 181K Anthracite grey, "SOPHIA" 1984 300 SD Turbo(sold) 2004 Subaru Forester XT,Cayenne red.
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#5
10-02-2006, 08:20 AM
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Quote:
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#6
10-02-2006, 08:32 AM
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Quote:
It's normal, these were built to cruise 55mph per the fun DOT regulations (just like why many only have an 85mph speedo LOL). I get about 2400rpm @ 55mph, right on the torque peak... Drop in a 2.47:1 diff and you'll decrease RPM and fuel consumption. 2.88:1 is best for a hilly area, if you live in the flatlands like many of us do in Texas... a 2.47:1 is great.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#7
10-02-2006, 10:17 AM
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Damn you pawoSD for being able to reach 80mph! I'm jealous!
Oops, gotta go. Frankie
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Frankie It never ends! 1985 300D Turbo 181K Anthracite grey, "SOPHIA" 1984 300 SD Turbo(sold) 2004 Subaru Forester XT,Cayenne red.
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