I read all the warnings. “Use a Van’s-approved engine or you’ll have a ton of trouble making everything fit.” Or this one: “By the time you convert the engine to what you want, you’ll have spent just as much money as if you’d bought new.” Tinker or fly? So, I now have a laundry list of issues related to my particular setup that will now require no small amount of customization, some of it in steel, which I haven’t had much to do with since shoehorning large snowmobile engines onto the backs of go-karts back in the mid-80’s. Here’s the list of fun so far:
-Throttle body interferes with the starter. The Kelley Aerospace starter has a retaining bolt on it that prevents the TB from being mounted in the diaphragm-up position.
-Stock brackets won’t work. Either the mixture or the throttle arm goes the wrong way when pushed, so a bellcrank is probably going to be required.
-AFP throttle body won’t play nice with the airbox. More fun with fiberglass.
-Fuel hose from engine pump to TB inlet is too short in any position except the one that won’t work because of the starter.
-Custom-length quadrant cables will be required.
-Throttle and mixture arms interfere with factory-set linkages when oriented in directions that work for me. I’ll need a straight arm from Don at Airflow.
-Right magneto interferes with battery box. Will need to be re-indexed for harness to clear and be retimed.
-Left magneto had to be removed to adjust oil cooler fitting. Timing will need to be reset.
-Breather tube is a little close to the RDAC. Should be OK though.
-Alternator interference unknown at this time, since I haven’t purchased it yet.
-Oil cooler taken off the engine when I got it is cracked. Need a new one.
-Oil pressure fitting is AN3, not AN4, so the supplied hose won’t work. Earl’s doesn’t seem to have a steel expander either.
So should I have listened to the warnings? Waited for a a good deal on an engine with a standard Bendix fuel injection system that wouldnt’ have necessitated an aftermarket, oddball sump? Maybe. Am I kicking myself for not doing so? A little. Thanks to the teardown/rebuild, I’m pretty much out of money and it’s going to take some time to build up reserves. I could probably still fit the cowl, and I can definitely get the avionics and wiring done, but the firewall-forward engineering may be my greatest challenge yet. But I know a guy at Crashspace with a 6-axis mill and a lathe. Van’s Air Force is still my lifeline. And I’m in too deep to quit now.
As I write this, I’m on Alaska Airlines on initial descent into LAX, returning from Vancouver, BC. If human beings can figure out a way to get me online in a big spam can at FL30, I can find a solution to the nearly-overconstrained problem of the firewall forward situation.