HF leakdown test is a Piece of Big Steenkeeng SHTUFF but here is
OK I see some improvement.........
Top photo you can see the tap sticking out of the body of the unit on the right. The .040 jet I bought off ebay is at far far right. Turns out they have 8-32 threads. The original HF "orifice" is somewhere around 1/8" So all I had to do is ream the "orifice" out to tap drill size, and run an 8-32 tap through it. I used the original HF 0-100 gauge for "inlet" and was going to use one of my compression gauges, but it's 0-300. Then I remembered an old refrigeration manifold, and robbed a low side gauge.
This may not be "completely" accurate. With the plug hole hose plugged in, leaving it "open" and adjusting the inlet gauge for 80psi, the "low" gauge still indicates 8-10 psi. Seems like it should be zero which would be 100% leakage.
Nevertheless it IS a baseline and IS way WAAAAAAYYYY more resettable than the original setup
OK I see some improvement.........
Top photo you can see the tap sticking out of the body of the unit on the right. The .040 jet I bought off ebay is at far far right. Turns out they have 8-32 threads. The original HF "orifice" is somewhere around 1/8" So all I had to do is ream the "orifice" out to tap drill size, and run an 8-32 tap through it. I used the original HF 0-100 gauge for "inlet" and was going to use one of my compression gauges, but it's 0-300. Then I remembered an old refrigeration manifold, and robbed a low side gauge.
This may not be "completely" accurate. With the plug hole hose plugged in, leaving it "open" and adjusting the inlet gauge for 80psi, the "low" gauge still indicates 8-10 psi. Seems like it should be zero which would be 100% leakage.
Nevertheless it IS a baseline and IS way WAAAAAAYYYY more resettable than the original setup
