[W126 Coupe] Help! : diff ratio's

[Divov]

Dawid,
The 500 is really a bit of a slouch off the line. The 560 is a rocket in comparison.
My 500 (at highveld altitude) does about 230 kph in 3rd (at 6000rpm) but max'es out at only 240 in top. At 240 it is only revving around 4200...
The 500 mill is free revving and goes to red line willingly (except in 4th!)
That 2.24 diff ratio on the 500 really really makes it an old mans car. 160 kph @ 2900! - its hardly working up a sweat.
Your 560 does about 7 sec  0 - 100 kph & is way, way faster. I think partly from more beans & partly from 
better ratios.
Clearly the 560 was aimed at being more sporty - and certainly is.
I have only 170KW vs your 220KW. That's a serious difference... 170 KW moving 1600kg aint no ball of fire.
Alec

  ----- Original Message ----- 
  From: Dawid Loubser 
  To: Mercedes Coupes Mailing Lists 
  Sent: Thursday, April 26, 2007 10:44 AM
  Subject: Re: [W126 Coupe] Help! : diff ratio's


  Hi Alec,


  According to information I found searching the mailing list archives, the standard diff ratio of the 560SEC
  is indeed 2.47. (Unless there's a difference between the US and European models, but there is not
  as far as I am aware, especially if you've seen many 2.47 ones around here.)


  I'm actually surprised that the 560SEC has a higher ratio (more RPM per km/h) than the 500SEC (at 2.24).
  I would have imagined them making the 560 more of a relaxed, higher-top-speed cruiser, considering 
  the more powerful engine. On the other hand, maybe the 5.6L M117 engine has better high-revving 
  characteristics, as well as the fact that the top speed is already artificially limited to 250km/h (with some 
  RPM left if the limitation is removed).


  But still, considering the Autobahn cruiser intent of the car, I'm surprised.


  regards,
  Dawid


  P.S. Mailing list archive search: http://www.mercedes.cx/560SEC/archives/secq.html




  On 26 Apr 2007, at 9:03 vm., Divov wrote:


    Please could anyone tell me what the standard diff ratio is on a 560SEC.
    This can easily be read off by looking at the diff from the rear and is stamped on the bottom left hand corner.
    Help greatly appreciated.
    (the 500SEC is 2.24)
    Thanks
    Alec D.
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