If your intake gauge shows 15 mmHg, how much lift do you have?

To determine the amount of lift that corresponds to a reading of 15 mmHg on an intake gauge, it's important to understand the relationship between pressure in inches of mercury (mmHg) and the lift in feet of water that can be achieved.

The conversion factor to find lift in feet of water from mmHg is based on the density of water and the properties of mercury. One inch of mercury is equivalent to approximately 1.13 feet of water. Since 1 mmHg is approximately 0.03937 inches, the conversion from mmHg to feet of water involves converting mmHg to inches first and then using the conversion factor to get to feet of water.

In this case, the calculation would be as follows:

1. Convert 15 mmHg to inches of mercury:

15 mmHg × 0.03937 inches/mmHg = approximately 0.59055 inches of mercury.

2. Convert inches of mercury to feet of water:

0.59055 inches × (1.13 ft water / 1 inch) = approximately 0.6679 ft water.

This conversion can be further simplified:

15 mmHg is usually multiplied directly by a conversion factor (typically around 1.133 feet of