ok, THAT was marathon plane building! Everything from finalizing the carb mounting, intake & exhaust manifolds final fitting, wiring the entire instrument panel, installation of said panel, and hooking up a variety of temp and pressure sensors.
It was very cool having the panel all powered up and listening to local traffic on the radio while wiring up the last bits forward of the firewall. Checking the eIs temp sensors.. it was cool seeing them respond. I have a questrion tho.. Ya know those spark plug mounted temp sensors for the EIS?? Steve Bennett told me that they might be better placed under a head bolt (to get an average reading rather than peak, and less wear when changing out the spark plugs). I prefer them under the plug (I want peak temps displayed) but it looks like I have to router (gouge) out some metal from the head near the plug recess to make room for the device. If not, it looks like the device will be sheared off when tightening the plug. Should I remove the compression washer that came with the spark plug? When gouging out a space for the temp sensor to exit alongside the plug, where to make the cut? 12:00, 6:00, 9:00?? Is it different on each cylinder? Will the head(s) do something bad like crack under load? Itsa 2180 great planes motor with dual ignition. thanks jg N611GB Puyallup WA p.s. I bought used intake manifolds and today cleaned them out before their final mounting and WOW, what a load of dirt was in them! All coating the interior walls. Good grief, if that's what happens from not running an air filter, I am really glad I am running one..
