what would happen if i hook up a heater with these specs to 12v instead? i know it would not get as warm but would it draw more amps even though the OHMS are set? I guess it would just draw less amps as well. do i have these equations right V/I=R Volt/Amps=resistance

specs: 66 OHMS, 2000 WATTS, 115V, 60 Hz

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'73 VW camper
'80 300td wagon

yes. that is true

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'73 VW camper
'80 300td wagon

So do you have a 12 volt power source that can sustain 166.6 amps?

Happy Motoring, Mark

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DrDKW

66 OHMS, 2000 WATTS, 115V, 60 Hz. The only number you would use is the 66 Ohms, but that's wrong. 2000 Watts at 115 V is 6.6 Ohms, but anyway...
I = E/R
R = 66
E = 12
I = 12/66
I = 1.82 Amps at 12 V in your car.

Then P = EI
P = 12 x 1.82
P = 21.8 Watts worth of heat

And if it has a 120 VAC fan, it would be unhappy at 12 VDC.

Get a 12v marine heater.

Some old air cooled cars had gasoline burning heaters. They will produce a tremendous amount of heat at a reasonable cost.

They are also great conversation pieces, BBQ jokes and such.