"Problem is, I'm gonna have trouble keeping my Magnum from exceeding the 17,500 RPM limit in SSC. With a brand new, piston and liner, on 5% fuel, it was turning 16,800, running rich. It's only going to get stronger, and I'm sure it's going to top out close to 18,000. "

With 5%, what did it pinch at? I've never heard of anybody not passing the pinch test using 5%. I normally need 15-20% to get to my target of 17,300-17,400rpm. My tach is always under what the official tachs have been reading, so I shoot for something below 17,500.

I just bought a jug of nitro, so I can match the nitro content at the field to get what I need without having to carry 2 or 3 extra bottles of pre-mixed...