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#1
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1967 250S (W108) 4 Speed Trans Manual
Hello, I just recently purchased a '67 250S w/ 4 speed on the column and noticed that it revs kind of high once I get into the fouth gear (at around 45mph). Is it me? or does it seem like there should have been a fifth gear? Any comments are most welcome. Thanks. Matt
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#2
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Compared to modern, more powerful cars equipped with an overdrive top gear, your 250S is going to seem a bit revvy at highway speeds. In order to get any kind of takeoff performance from a 2.5 liter engine in such a heavy car, overall gearing is lower than in most new cars.
I assume that your car is sound (clutch is not slipping). Try this link re: 250S performance parameters. When healthy, this is a 180kph/110mph car. www.geocities.com/SiliconValley/Pines/6633/w108w109/ |
#3
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That car came with a 3.92/1 rear axle ratio! That is what I use for racing. LOT of bottom end power, but no TOP end speed w/o a bunch of RPM!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#4
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I have to assume that a 250S 4-speed is pulling 3250-3500 RPM at 60MPH in 4th gear. This compares to the average big-6 American sedan which might see 2,000 RPM in overdrive 4th at that speed.
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