Today I installed my cng injection system on a Case tractor. After getting everything adjusted, we took it to a tractor dealer who had a PTO dyno. On #2 only, it dynoed 168 hp. We then turned on the gas and it made 238 hp. The owned isn't doing this for the power, but we wanted to see how it did. He has gas wells on the farm and this will greatly cut his operating cost. The tractor is mainly used for stationary work and can be hooked up to low pressure gas, saving all the compressing costs. When he needs to be mobile, it can run on high pressure gas from a tank. I hope to take the #2 consumption from 7 gal/hr to around 3. Here is a pic.

That's awesome! Now all he needs is a straight pipe and a boost valve.

The tractor owner was also impressed with how much it quieted the engine down. At idle, it almost sounded like a gas engine. It's much quieter at heavy load also.