I added a final few tools to my MFI setup arsenal - this little gem is required to set the internal angle on one of the levers inside the pump. It took me far too long to make:
I also had to make an adjustable fixture for setting the pump cold start enrichment to full warm, for testing.
I had previously made a few other tools, a puller for dismantling the front of the pump and a delivery valve extractor.
There are a grand total of FOUR digital readouts on my test rig, all of which are necessary to perform the pump tests. Including a DTI on the rack (with homemade adapter) and a handheld tach.
Last night I finished setting up the internals of the governor/compensator and perfomed the first few tests and adjustments. This seems to be going really well - precise, and repeatable. The rack travel baselines are set prior to doing the real meat of the tests, the volumetric measurements.
At some point I am going to have to figure out how and where to make the necessary adjustments for the greater fuel requirements - this will be a WAG for now, but I plan to map out the effect of the various adjustments on fuel flow so I can have a better chance of dialing in a curve that fits the requirements of the motor. There is more than one way to add (or subtract) fuel. Adding fuel at the main rack should be linear across the speed/load range but I need to verify this, and also map out the effect of various changes - IE I know that adding fuel to the midrange with the governor would have the same effect as reducing fuel at the low and high ranges and then adding with the main rack. However there would be a difference, and depending on the motors needs, one approach might be better that the other for a given case. Knowing this ahead of time (with a particular focus on effects on the light throttle delivery) should help to get the AFR dialled in sooner.
I should probably be taking notes.