Where Does The “336” Come From In The Speed/RPM/Gear-Ratio/ Tire-Size Formula?Unlike other versions of this formula you may have seen, I now include trans gear ratio as a factor. Back in the ...

Since cam selection is largely determined by the other two factors, you need to know how to calculate your compression ratio and freeway rpm. We′ll show you how it's done.

Using this formula, you can see that a four-pole motor operating on the bench under no-load conditions runs at 1,800 rpm (7,200 ÷ 4 poles). Note that when an ac motor is loaded, the spinning magnetic ...