I got my ACB this morning and will give the diesel one more try with 1.5% in the fuel. I am starting to think that this engine is not a good candidate for a diesel. I replaced the diesel head with the glow head and fired it up on 15% nitro glow fuel with the same redneck prop load I had on the diesel setup and got a full 2000 rpm higher with the glow than I could get with the diesel and the engine was a lot smoother and quieter running. It idled a little higher than the diesel, 2500 rpm vs the 2000 rpm. I was getting 9200 rpm with the glow vs the 7000 rpm with the diesel. We will give this ACB a try and see if it improves the power any.