oil pressure sending unit ohm's
 

Does anyone know what ohm's correspond to what pressures the stock sending unit puts out? Engine is from a '02 trans am, i just need to know cause my gauge only goes up to 60, and the sending units are made for gauges up to 80psi, so its not reading right. If i knew what ohm's i should be looking for then I would know what pressure Im running. Thanks.