Currently, with my 3.07:1 axle, the 617.950 pulls hard in first and as soon as 2000 rpm comes up, I am developing 14.7 psi of boost. The 1st gear downshift is critical to having a 'peppy' 617.

I am preparing to swap in a 2.47:1 and 1st gear start is even more critical with a tall gear in the back...

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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership