Mike, I haven't had a chance to install the TBI, but I have made progress improving the performance of the Bing. It's been another busy year, we just sold a house and purchased another, so the airplane hasn't been a priority. Here are the known knowns ;-)

I've developed a new Bing inlet, my version of the Jabiru Cobra head, and airbox, basically a cold air intake. This is a modification of a previous design that replaced the stock filter airbox (FAB) that addressed the EGT span issues. This new intake is a significant improvement, I was up to a 290 main jet to get the EGT's down, stock is 255, and had to reduce to 260, 255 would work, but I had drilled it out. Cruise EGT's were excellent, but I was still running rich above 2,850 rpm, not developing full power.

The next modification was to make the balance tube adjustable, creating mixture control. It's currently setup as ground adjustable, but I'll be adding an assembly that will allow for inflight mixture control. The balance tube is the fuel bowl vent, increasing suction leans the mixture, think HACman without the plumbing.

So, I've set the balance tube to lean the mixture above 2,850 rpm on high speed taxi tests and hope to do some flying in a week or so, then I'll add the ability to make it inflight adjustable. Through all this madness, I've come to believe that the Bing is more than adequate if it has an optimized intake system. I don't think that spending the money on a TBI is necessary, but I have one and after I get 20-30 hours on the Bing, I'll install the TBI, just for grins.

The key is a better intake regardless if you're running a Bing or TBI.

Jake