Re: 1938 Super 8 1605 - adventures with a newbie

Posted by humanpotatohybrid On 2023/4/19 19:13:53

in. Hg is inches of mercury, not water, so 7 in. Hg is about 95 in. water or 130 in. gasoline.

Put another way, 7 in. Hg is about 3½ PSI which is pretty normal pressure after the fuel pump, so I would think it would be adequate before.

What looks strange to me is how quickly it loses vacuum.