All things being equal, it would be great if Terry could run some baseline numbers using a set pump gas/oil mix ratio and then without adjusting anything other than the high speed needle, give comparison numbers for different fuels...
Who knows, maybe he already has plans for something like this... and probably has a long list of stuff to try out once his dyno is done.
Terry, as others has said before, Thank you!! for all you are doing to benefit us little guys out here understand how to extract top performance from these little powerhouses
and cut thru all the hype and claims!!!
Ya got me thinking now. Watching various motorsports and dyno testing for both engine dyno's and chassis dyno's. It's generally about max performance to varying degrees, all the way to the portable chassis dyno's that travel around and guy's pull their "dyno queens" onto for bragging rights. I have no issue with any of that - do what you want. A dyno is a tool that has many applications and uses for both manufacturer and end user.
Dyno testing can be far more useful than just engine tuning - as you alluded to, making testing comparisons as well.
Another one I would love to see are some dyno results on engine vibration isolation and types of engine mounts to include overall mass. Notice I didn't refer to them as "vibration dampers" because they really are not that in engine mounting in a race vehicle. It doesn't seem like they would dampen anything - they decouple vibration. Some racing vehicles use them, some don't. Drag boats, drag cars hard mount to the chassis, as do sprint cars, karts, many motorcycles.
Decoupling engine vibration in model boating was recommended to me years ago by Don Pinkert for a Thundergator twin I was building. Don explained in a twin there is harmonic interaction vibration from the two engines - which made perfect sense to me.
But, why on a single engine setup? Decoupling decreases hull vibration and likely increases engine vibration in the process. Hardness and stiffness of mounting also is a factor. I've seen discussions about high engine vibration and broken glow coils and such from softer rubber isolation pads. That would be most interesting to see some dyno results of varying engine mounting and decoupling versus solid mounting.
It may be that decoupling in a single engine condition simply increases engine wear and decreases performance. Not sure, would love to see some dyno testing and monitoring such as strain gauge stuff.
The model engine dyno's I've seen are all rigid mount types. Perhaps someone has already done this and published the results? Common knowledge in the model boating community and I'm just behind the times?