I hope some of you will find this RPM-finder useful. Just take the tire height information you learn above and use the drop-down
menus below to calculate your RPM's for a desired speed. Keep in mind these figures will
get you close but are not exact. Only OEM automatic transmissions are listed (manual
transmissions have too many variables) and the differential ratio menu contains most of
the common ratios. Hope you find this useful. Let me know if there's anything else I can
program to make your project easier. The answer will appear above the form.
Enter the length of wire you need (in feet) and the maximum amperage below to find
the MINIMUM suggested wire gauge for a 12-Volt DC system.
This is a handy tool to calculate the suggested MINIMUM AWG (American
Wire Gauge). This calculation is based on a 12-volt DC system with no more than a
0.5 voltage drop. This is only a suggestion!
NOTE: Keep in mind that 13.5 volts is typical when your engine in running and the Alternator is working
correctly. Also, sizing for lighting is more critical because a voltage
drop will decrease the luminous intensity of the light. A 1/2 volt drop can decrease a
lamps rated luminous intensity by 20%. That means a 100 watt lamp would only be operating
at 80 watts! That's why it's always wise to figure on the high side, especially when sizing wire for
lighting.
