After completion of the retrofit, I just now charged up the system tonight.
For details of my retrofit, see section at the bottom.

I charged using canned R134a Interdynamics from Walmart.
Vacuum was pulled (see retrofit section at bottom).
After purging the air out of the fill hose (manifold guages) I added one full 13oz can. Engine revving on-off from 1K to 2K RPM (I was by myself), it took the can. Windows open, A/C dial on max blue, fan speed 3. Compressor kicked in quickly and never stopped.

I started adding another can (after purging air out of fill hose). This was again an Id 13oz can this time including leak sealer (hey why not). In time, maybe within 5 minutes, it took the whole can. I continued to try to keep RPM at around 1500. Compressor still running, never stopped. At this point should the compressor start to cycle (i.e. turn off sometimes)?

The air out of the vents was 'cool' slightly. The copper piping to the evaporator is cool too. Nothing more than that. After 3 minutes, compressor still hasn't stopped.

Low pressure around 45, high around 240. It was in my garage, door open, car running, maybe 100 degrees F.

I decided I might need some more refrigerant. Using the third can, I added around 1/3 of it (approx by weight). Air is somewhat cooler now, but compressor still has not cycled off.

Though I am not too happy with the coolness, but understand that the system might not be very efficient with orig evap and orig cond, I am wondering why the compressor is not cycling. The sight glass on the dryer shows a whiteness, no bubbles really, but not sure what it should look like.

Any thoughts? I don't want to run a system with a compressor that does not cycle, and kill the compressor prematurely. Should I add more refrigerant? So far it should contain roughly 13+13+4= 30 oz.

Does it need time to stabilize?

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Retrofit details:

New expansion valve
New dryer
Removed compressor , dumped oil, added 8oz ester 100.
New high pressure hose (it was leaking at the silencer)
New o-rings
Compressor is remanufactured about 3 years ago
Low pressure hose changed three years ago
R134 port adaptor fittings for high/low side at back of compressor
all else seems original

I pulled a vacuum with my mastercool 5CFM and it has held well for 3 days now, so I deduce no leak, since I found a leak at the high pressure hose too. Pulled vacuum for 10 minutes, then waited 30, then pulled again for 1 hour.

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