Quote:
Originally Posted by pusherfans
The new standard Kirkham differential ratio is now 3.54. Before that it was the 3.42. There is not a lot of difference between the two.
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First, bummer. 20/20 hindsight, and I know there's little difference between the 3.42's and the 3.54's, I would prefer the 3.54's. My car feels like it wants more gear, probably because of the cam. At around 70-75 MPH, my car wants just a tad more gear. 2,000-2,200 RPM is works great, but I wouldn't mind being a couple hundred RPM higher.
I like my 3.42's with the 0.82 5th gear. I would NOT like the drop in RPM's, if I had gone to the 0.64.