Making a bit of progress. The engine has always run OK and it was easy enough to make changes to sort out issues at lower revs and loads. I've now had a couple of days on the ESE dyno and have been doing full throttle runs to whatever revs it will do.
I had a configuration programmed that I thought was not going to work after the first day. We gave it another shot today and it is good enough that I'm not bothering to change it. One difficulty today was a fueling issue just as it is coming up on boost. We never really got it sorted. It was actually better at half throttle. A pleasant surprise is how easily it pulls boost. If the revs drop to 6K you can give it full throttle and by 10K it has boost and would probably have more if the fueling was better. If you have had revs high and let it run down to 10K and open the throttle full it pulls 140kPa straight away. i'm pretty sure the turbo wastegate is opening at 140kPa so that's all I've seen. A real problem is that it isn't happy revving over 16K or so. the AFR moves about a bit and as it approaches 16K it suddenly goes very rich. We were thinking it was an ignition issue but I think not. Lambda meters measure the oxygen in the exhaust and if ignition failed there would be more oxygen and a lean indication. something to check some other day.
The motor might be making a bit of noise, a sort of top end rattle. I'll be taking the camcover off to have a look and will check tappets and cam chain.
Anyway, the end result is a pretty impressive torque curve and an OK horsepower figure. There's more to go if I haven't broken the motor. There's 2K rpm to go for instance. The turbo will hold the torque up which with revs will make more horsepower.
One thing I like with this setup is how the throttle can be moved how you like at any revs and the motor smoothly goes about it's business.
Must sort out a generator for the bike. The small battery charger wasn't keeping up with the supply and the little battery ended up dropping to 9V or so. The bigger battery and charger sorted it out today.
It's a thirsty little beast as well.
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