Fuel Flow Setup in NoCal

[Learjetter]

Bryan,
We do my NA IO-360s each annual with a very cool test set my avionics shop built. If you can make it to central OK, happy to help get yours all tuned up. It can be done by any A&P who can read the procedure. Turbos are a little trickier.

The procedure is straightforward and described in the old TCM SID 97-3, and now published in the TCM M-0 manual available on the tcm site. Usually takes a couple hours and several runs to get both engines dialed in and purring.

-LJ

[Joes]

A Shadin type fuel flow indicator seems to make the setup and checking a lot easier. The pressures equates to fuel flow (gph). The sid was created when the fuel flow indicator that was originally installed was a pressure type. Is this the correct way of looking at the setup and verification? Joe

[Learjetter]

Joe,
Yes, on the air-breathing TCM IO-360 series (most versions) “pressure is flow” and if you’ve nothing else ensuring you get @ 50RPM max rise when leaning from full-rich at 650 RPM smooth idle, and @ 18+ GPH at 2800RPM you will be in the ballpark. Our kit measures both unmetered (into throttle body) and metered (at flow divider), and makes dialing in to the exact pressures (and flows) easy. We use sensitive pressure transducers plumbed into the fuel lines with AN fittings and put the pressure digital display in a small pelican box that sits in the cockpit while we follow the steps in the M-0.

[amexbmorgan]

Yeah - I'm not getting the 18+ at 2800. At least according to the ships gauges.
I'm interested in traveling to get this resolved, but don't know anyone with the gauge and/or anyone who wants to work on it.

Thanks,

Bryan

[Kim Geyer]

I would not use a Shadin or jpi to set up your fuel flows. You must/ should use a calibrated gauge to set it up. The K factor on a Shadin or jpi can get off and give you an inaccurate reading. If I remember correctly we had a past member crashed because his fuel system was adjusted using his electronic system. He didn’t survive.

[Joes]

Learjetter, does your setup accommodate a tsio 360, and i would like to see pictures of the units if its possible.