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In my VX lean burn stops at 2500 RPM, so I try to use lean burn almost exclusively. I can feel the power surge when I go beyond the lean burn threshold with throttle position, so in this case it is well below 80%, but that is just becasue of the lean burn feature of the VX. The VX pulls well enough from 1000 RPM in 5th gear at 30 MPH.
In Pales instance, lean burn is not an issue, and the proof of his point lies in his mileage.
Larger displacement long stroke engines should use lower RPM.
The other day I was accelerating next to a fairly large diesel box truck. We were shifting gears and accelerating at almost exactly the same pace until I moved ahead in 3rd gear, which in the VX will red line at close to 120 MPH.
regards
Mech
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