RPM'S

[8543bob]

Good morning all, I have 2 questions; I have been using my M quite a bit since the engine rebuild. Its 100% stock Wondering, whats the engine turning when I'm doing about 40-45MPH, I dont usually go over 45. Second; whats the PSI for the 16" NDT tires?? Thanks BOB

[Lifer]

At 45 mph, your engine will be turning somewhere in the neighborhood of 2,000 RPM.
Tire pressure should not exceed 40 PSI.

[W_A_Watson_II]

Bob,

My calculations (http://m37.wawii.com/images/MyM37SpeedChart.gif) show that the 5.83 gears would put you at about 2600 RPM for 45 MPH.

[cuz]

And those figures will work only if the speedo is accurate.