Always an interesting thread,
It must be so noisy that if you have neighbors within 1 km they will think of a new war ... you will destroy the laboratory windows
i might suggest a marine type throttle remote. it will hold position easily. i have a mathers micro commander on one of my vessels and it has tiny servo motors attached to lead screws for the shift and throttle. also available are programmable outputs for engine management. this would be a "fly by wire" type control. older versions can be found very reasonably priced. of course you can always engineer your own solution...The Flavia engine has been repaired (new crankshaft, conrod and bearings) and installed on the new engine test stand and has been connected to the power meter. At the beginning it did not start because the ignition sequence was wrong. And I swear I did not change it!!! Once this problem had been solved, I shortly turned it up to 2500 rpm without the cooling water of the Schenck being running. The instrument did not move at all.
After turning on the water, the instrument woke up, while the engine stopped fairly quickly. The load lever of the power meter had been set too high. At that time, I got really nervous with the propshaft of the power meter idling right in front of me. Turned down the load with the remote control and started the engine again.
Did some playing with the engine revs and the power meter load but honestly was feared by the incredible noise the engine produced without exhaust installed while I had to stand very close to the rotating parts in order to operate the carburetor throttle for setting the revs. Made a few photos using the rc of the camera. The square instrument in the switch cabinet shows the revs. Engine revs and load interact and it needs some experience to balance them for correct measurement which I did not manage this time.
I made some jokes about the cable rc of the Schenck before, but now I see its legitimation. Even if you are not a milquetoast as I am it is difficult to observe the instruments, set the engine revs and the power meter load simultaneously while standing close to the roaring engine.
Each test brings a gain of knowledge! Still very many things to learn in order to get it right!
Next thing to be made is a remote control for operating the throttle and some emergency cutout to prevent going berserk of the engine. The throttle actuating will have to be sensitive and other than the pedal on the car will have to keep the position. The cutout should work on two features at least (ignition and fuel pump).
There is a spare Flaminia 2.5 3C without carbs on the shelf. I think I will install a 3B carb and put that on the meter next.
Just for reference: at maximum output (90hp) the meter should show 120N at 5500 rpm.
PS The engine frame is on wheels which allows to roll it under the chain hoist to install the engine, but during power metering it could be settled better. Will mount machine feet which can be lifted for taxiing
Pete,Curiosity question: Does the Flavia flat 4 engine have 2 camshafts, one on each side of the crankshaft, or one camshaft and the pushrods are longer for one side of the engine than the other please?
Other than the old devices (often Bosch in this part of the world) the modern tester is not designed for testing the high voltage part of the ignition. I have contacted the manufacturer about this. As far as i can see it should not be a problem to add a coil and a couple of spark plugs.as much as i like the old sun distributor consoles, i have to say the modern compact is the way to go. i have noticed the same thing about the peaks not being exactly lined up on my scope. this is on a distributor i have reconditioned and re-shimmed the gear for minimal play. this also has an electronic module in place of the points that has some programming for adaptable dwell angle. the only thing not reconditioned were the advance weight springs as i don't have a good way to check the advance curve. i can crudely check the curve using the advance dial timing light at different rpm values but it's far from accurate.
i may have to look into this small tester you have to add to my equipment.