Quote:
Originally Posted by dcb
Vago, have you considered a lower ratio rearend gear? It might be cost effective to do so with some shopping around.
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I have considered a taller gear ratio, as well as a Laycock-type overdrive unit. I could go down to a 3.23 rear end with a taller gear, or I could effectively go to a 2.77 rear end with the Laycock unit.
Trouble is, I'm not sure if doing either of these things would actually gain any FE on my truck. Either option would push my engine speed well below 2000 RPM at cruise (1800 with the 3.23 diff, and 1560 with the Laycock unit), and any gain from running at lower engine speeds may likely be offset by the fact that the engine would be running well into the bad part of the torque curve. Nobody's been really able to produce a dyno chart for my engine (apart from the OEM propaganda), showing torque at speeds below 2000 RPM, so I can't really tell for certain.