Metering Unit Testing

Going for this test using a vacuum pump with an ability to control the vacuum to use feeler gauges. Table:1

So i bought this little pump its sucks! but only 12 inhg.

So an upgrade was required this baby does suck 26 inHg! It only came with a plug so I made the control panel with a switch, manifold and a gauge holder for the gauge that attaches to plenum where the brake servo vacuum goes. The toilet roll is an essential make do filter at the moment.

Needed something to bench/vice hold the metering unit so a small weldment will suffice.

The weldment has multiple pcd offset so it can be used to refurbish the unit as well.

Short Video of the pump in action.

Holding Steady at 6 inHG ill take a picture of the feeler gauge checking at some point this should be 0.6mm from Table 1 above. So my engine is running 12 inHG at idle think I might plot a graph of my engine vacuum to rpm and see if there are differences. I guess if there is a play with the tension in the springs is needed to allow the vacuum to pull the cam the same as the readings in the table. Clear as mud as usual, there maybe bits I'm missing but its all a learning curve.

So doing the datum track checks on the bench is ok but a lot of work to take the metering unit off. So this weldment holds it in place when removed. It also holds it horizontal so the banjo fittings/seals can be serviced in place.

So what next hmm, maybe get this motor to run the metering unit so spray pattern test and a quantity of fuel can be attained.