Thread: 603 into w123
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  #19  
Old 06-11-2008, 12:30 AM
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Location: Cupertino, CA
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Sixto, I need to see your car next to mine (assuming you still have the 124). Maybe at the GTG or sooner to see if this is realistic.

I figure that I currently average about 25 mpg, and can get an absolute max of 32, but a realistic max or about 28-29. I think with the 603 on the 124 gets probably an average of 28-30, absolute max of 39-40 and a realistic max of 35-36.

So add in a 5 speed with overdrive, and a taller rear end, and I see a realistic average of 40, a max of say 46, and could realistically obtain 42-43 mpgs.

Does this sound realistic? I am going to figure out the weight differences between the 123, 124, 617, 603, and the two transmissions.
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1983 300d Turbo (Daily Drive) -- 243,000 miles
1979 280ce AMG (Beginning extreme restoration) -- 141,410 miles
1979 Yamaha Chappy LB50 (Awating new points) -- 1411.6 miles

1981 300d Euro 4 speed -- 188,421 km -- SOLD
1979 300d Euro 4 speed (Sold to Brother) -- 257,000 miles

A Collection of w123 AMG Cars and Parts
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