Yes, but the fuels are so different that it's not the oxygen that makes the power. What's the combo. The CHP was designed for low compression crate style circle track engines. The 113 will still work in this combo, but will be too much octane. Just depends what the racer is doing with the engine. Plus the CHP is a bit more than the 113.
Jason , the customer is in the process of building an engine. I'm not too sure yet on what his plans are but he asked me too get a little more info on the CHP to compare. I'll wait to hear more on his setup before I give him my opinion