This was one of the most entertaining reads I have read. You did well. I have been messing with these little cars and nitro engines since 1969 (a Cox Buggy), and I love getting the absolute best out of them. I salute you! However, I do have a question; did you ever try cutting a little off the header? If not, I think that will help you a little more.
Originally Posted by
fyrstormer
As I predicted, the car hit 50mph more reliably with the original pinions and smaller spurs, meaning it goes a fraction of a MPH faster than before. It still has more than enough torque to spin donuts when I feel like being silly, though. I can finally say this project is done.