Wow... this was a good thread! My fuel pumps make lots of noise, but guess what! Start the engine, and you don't notice it any more! Good questions Mark, and good answers Mark!
I'm fussing with my tachometer... I wired up a circuit, and it reads 0RPM. Those who were following last year... or about that time, the tack is reading 1/2 speed due to only getting 1/2 the pulses from my Compu-Fire ignition. Just ohmed it out last weekend. (I average about 1 200 mile round trip hangar vist every two months now). At any rate, the wiring is OK... I just need to dig and buy a Compu-Fire tack adaptor, and be done with it, my diodes, must either be too slow or I've otherwise hosed it up. Moral of the story... buy the tack adaptor from Compu-Fire. I tried the diode solution, but it hasn't been successful. Since I don't have the electrical specs for either the compu-fire, or the tach it makes designing a solution rather time consuming. I don't have time to take all the measurements to build some alternatives... I want to move on to stage2... (purge the brakelines, and taxi test). Ok well, we have all those Ellison carb/mixture & RPM settings to finish before taxi, which was why I wanted the tach to read properly in the first place. Hopefully in March/April for my next hangar trip, the weather will dry out here in Oregon. ;) (Going on 16 years and counting... no hurry). http://n541ry.us
