Old timers used to change the oil in their semis and then dump that ten gallons of used oil straight into their fuel tanks, Sure there is always metal particles but that is what fuel filters are for and Many a truck went hundreds of thousands of miles doing that. Now to today. My buddy worked...
Convert a 4 stroke to a 2 stroke that way you have more firings for a given number of revs. A super charger/ turbo charger set up will be needed since you probably don't want to do all the work to make it a crankcase charged setup.
Just an idea!! Check out the old big 2 stroke diesel trucks...
Portal axles!! The VW thing used them so maybe you could adapt those to your project and be cheap or you could go with the Hummvee ones $$$$ It depends on your freeboard height but say you have a portal axle that is 1 1/2' from input to output, You could have the axle connected with an air...
How about one of those bicycle trainers, They have a display that shows you how many watts you are putting out.
They are available in magnetic resistance, viscous and in air resistance. It would probably be easier to adapt one of those to this project. They start at about $100.00 and go up from...
I know it's old but it might help someone else in the future. A colortune adapter will tell you what kind of burn you are getting in the bad cylinder. It screws into the spark plug hole and allows you to visualize the burn and then you can compare that to the other cylinders.
It is a nice...