I've been busy, but nothing looks any different on the car. Let's do point form for the first bit. Here's what Ive been up to (plus a million other little odds and ends):
1. Check, check, double check, the MFI pump. On the test stand. I did probably over 100 test runs, first checking the calibration (basically 2.7RS x 1.185 or so) but then fiddling with the various adjustments to see their effect, changing them back and checking, going the other way, etc. It was all very illuminating and I am more confident than ever that I this thing will sing!! Also discovered a few of my injectors were stuck/dribbling rather than operating as intended. They cleared themselves up but took a lot longer than you'd expect. Glad I checked off the car before first start.
Side note: I've had a few questions about the MFI setup - these pics will answer them for future curiosity, without wading back through 30 pages of posts:
2. PRIME the MFI system. The above exercise opened my eyes to the fact that it takes quite a while to fill the delivery lines with fuel. Not forever, but longer than you'd want to do on the starter. Again with first start in mind, I reassembled the system on the motor, flooded the pump input via gravity feed (think IV feed) and turned it with a drill. After a while (felt like forever but probably 30 seconds?) the shortest line filled, then the next, and the next until all 6 were giving a nice, idle speed, "poof" into the intake ports.
3. Time the MFI pump and button up install. This is simple enough, put the belt on and time it to the marks, even though you'd think they'd have made it a little more simple. You are timing to the FE mark on the pulley but after TDC of the overlap in cylinder #1, not TDC of the compression/power stroke. When you really dig into it, though, what they are doing is making sure the pump injection happens after the exhaust valve is closed and the intake is open.
4. Devise a way to keep the pump from injecting fuel during oil system priming. Always thinking about first start, here - I want to be able to crank the motor without injecting any fuel. The obvious way would be to take the drive belt off the pump but doing so with the motor in the car seems like a nuisance. An "ahah!" moment made me realize I can easily dissuade the pump from pumping by forcing the rack to zero, the same action tha thappens when the stop solenoid is energized. I used my dial indicator testing mount and an 8mm stud for this.
Don't Pump:
Pump:
